M CM200/CM300/PM400 Radios Detailed Service Manual 6881098C00-A
Foreword This manual is intended for use by service technicians familiar with similar types of equipment. It contains service information required for the equipment described and is current as of the printing date. Changes which occur after the printing date may be incorporated by a complete Manual revision or alternatively as additions. Note: Before operating or testing these units, please read the Product Safety and RF Exposure Compliance section.
CM200/CM300/PM400 Radios Detailed Service Manual 6881098C00-A Contents Section 1 Service Maintainability Section 2 Control Head Service Information Section 3 UHF2 Low Power (1-25 W) Service Information (438-470 MHz) Section 4 UHF2 High Power (25-40 W) Service Information (438-470 MHz) Section 5 UHF3 High Power (25-40 W) Service Information (465-495 MHz)
Notes THIS PAGE INTENTIONALLY LEFT BLANK
M CM200/CM300/PM400 Radios Service Maintainability Issue: November, 2007
ii Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form, the copyrighted computer program.
iii Table of Contents SAFETY INFORMATION .......................................................................................... v Chapter 1 INTRODUCTION 1.0 Scope of Manual ..................................................................................................1-1 2.0 Warranty and Service Support.............................................................................1-1 2.1 Warranty Period and Return Instructions .......................................................1-1 2.
iv Notes
v SAFETY INFORMATION Product Safety and RF Exposure Compliance Note: Before using this product, read the operating instructions for safe usage contained in the Product Safety and RF Exposure booklet enclosed with your radio. ATTENTION! This radio is restricted to occupational use only to satisfy FCC RF energy exposure requirements.
vi Notes
Chapter 1 INTRODUCTION 1.0 Scope of Manual This manual is intended for use by service technicians familiar with similar types of equipment. It contains service information required for the equipment described and is current as of the printing date. Changes which occur after the printing date may be incorporated by a complete Manual revision or alternatively as additions. NOTE Before operating or testing these units, please read the Safety Information Section in the front of this manual. 2.
1-2 INTRODUCTION 3.0 Replacement Parts Ordering 3.1 Basic Ordering Information When ordering replacement parts or equipment information, the complete identification number should be included. This applied to all components, kits, and chassis. If the component part number is not known, the order should include the number of the chassis or kit of which it is a part, a sufficient description of the desired component to identify it. 3.
Radio Model Information 3.6 1-3 Parts Identification Radio Products and Solutions Organization* (United States and Canada) 1-800-422-4210 * The Radio Products and Solutions Organization (RPSO) was formerly known as the Radio Products Services Division (RPSD) and/or the Accessories and Aftermarket Division (AAD). Radio Model Information The model number and serial number are located on a label attached to the back of your radio.
1-4 INTRODUCTION Notes
Chapter 2 MAINTENANCE 1.0 Introduction This chapter of the manual describes: 2.0 • preventive maintenance • safe handling of CMOS devices • repair procedures and techniques Preventive Maintenance The radios do not require a scheduled preventive maintenance program; however, periodic visual inspection and cleaning is recommended. 2.1 Inspection Check that the external surfaces of the radio are clean, and that all external controls and switches are functional.
2-2 MAINTENANCE NOTE 3.0 Always use a fresh supply of alcohol and a clean container to prevent contamination by dissolved material (from previous usage). Safe Handling of CMOS and LDMOS Complementary metal-oxide semiconductor (CMOS) devices are used in this family of radios. CMOS characteristics make them susceptible to damage by electrostatic or high voltage charges. Damage can be latent, resulting in failures occurring weeks or months later.
General Repair Procedures and Techniques 2-3 Chip Components Use either the RLN4062 Hot-Air Repair Station or the Motorola 0180381B45 Repair Station for chip component replacement. When using the 0180381B45 Repair Station, select the TJ-65 minithermojet hand piece. On either unit, adjust the temperature control to 370 °C (700 °F), and adjust the airflow to a minimum setting. Airflow can vary due to component density. • • • To remove a chip component: 1.
2-4 MAINTENANCE Shields Removing and replacing shields will be done with the R1070 station with the temperature control set to approximately 215°C (415°F) [230°C (445°F) maximum]. • • To remove the shield: 1. Place the circuit board in the R1070 circuit board holder. 2. Select the proper heat focus head and attach it to the heater chimney. 3. Add solder paste flux around the base of the shield. 4. Position the shield under the heat-focus head. 5.
Notes For All Schematics and Circuit Boards 5.0 2-5 Notes For All Schematics and Circuit Boards * Component is frequency sensitive. Refer to the Electrical Parts List for value and usage. 1. Unless otherwise stated, resistances are in Ohms (k = 1000), and capacitances are in picofarads (pF) or microfarads (µF). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multimeter or equivalent. Transmitter measurements should be made with a 1.
2-6 MAINTENANCE MIC_PTT_CH Microphone PTT Input MOD_IN Modulation Signal from ASFIC MOD_OUT Modulation Signal to the Synthesizer ONOFF_SENSE On off sense switch OPT_DATA_R_OPRD DATA/Ready Request from Option Board OPT_EN_OPBD Option Board Chip Select PA_BIAS PA Control bias voltage PA_CURRENT Not used POST_LIMITER_TX AUDIO_RETURN_OPT_BRD Flat TX Input from Option Board PROG x IN ACC y General Purpose Input x accessory connector Pin y PROG x INOUT ACC y General Purpose Input/Output x a
Notes For All Schematics and Circuit Boards 2-7 VS AUDIO_SEL Switch signal to Enable option board audio output signal VS GAIN_SEL Voice Storage Gain Select line VS_MIC Voice Storage Audio Signal to microphone path VS_INT Voice Storage Interrupt line VS_RAC Voice storage Row Address Clock Signal VSTBY 3.
2-8 MAINTENANCE Notes
Chapter 3 SERVICE AIDS 1.0 Recommended Test Tools Table 3-1 lists the service aids recommended for working on the radio. While all of these items are available from Motorola, most are standard workshop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed. Table 3-1 Service Aids Motorola Part No. Description Application RLN4460_ Portable Test Set Enables connection to audio/accessory jack. Allows switching for radio testing.
3-2 2.0 SERVICE AIDS Test Equipment Table 3-2 lists test equipment required to service the radio and other two-way radios. Table 3-2 Recommended Test Equipment Motorola Part No.
M CM200/CM300/PM400 Radios Control Head Service Information Issue: November, 2007
ii Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form, the copyrighted computer program.
iii Table of Contents Chapter 1 OVERVIEW 1.0 CM200 Model.......................................................................................................1-1 2.0 CM300/PM400 Models ........................................................................................1-1 Chapter 2 THEORY OF OPERATION 1.0 Introduction ..........................................................................................................2-1 2.0 Control Head Model for CM200 ......................................
iv 2.1 Control Head PCB 8488998U01 Parts List .................................................... 4-5 3.0 Control Head CM300/PM400 - PCB 8489714U01 / Schematics ......................... 4-6 3.1 Control Head PCB 8489714U01 Parts List ....................................................
Chapter 1 OVERVIEW 1.0 CM200 Model The control head contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio, three indicator Light Emitting Diodes (LED) to inform the user about the radio status, and a single character 7-segment display for numeric information e.g. channel number. 2.
1-2 OVERVIEW Notes
Chapter 2 THEORY OF OPERATION 1.0 Introduction This Chapter provides a detailed theory of operation for the Control head circuits. For details of the trouble shooting refer to the related chapter in this section. 2.
2-2 THEORY OF OPERATION When the host radio needs to send date to the shift register, the radio asserts the shift register chip select and the data is loaded to the shift register. For example, the host radio sends data to change display channel or change LED status. 2.3 Keypad Keys The head keypad is a four-key design. All keys are configured as two analog lines read by µP. The voltage on the analog lines varies between 0V and 3.3 V depending on which key is pressed.
Control Head Model for CM200 2-3 If the BOOT_RES (J802-7) line is connected to >5V (e.g. 9.3V) at turn-on, the uP will start in boot mode instead of normal operation. This mode is used to programme new firmware into the FLASH memory (U404 mainboard). 2.6 Speaker The head contains a speaker for the receiver audio. The receiver audio signal from the differential audio output of the audio amplifier located on the radio’s ler is fed via connector J803-1, 2 to the speaker connector P801 pin 1 and pin 2.
2-4 3.0 THEORY OF OPERATION Control Head Model for CM300/PM400 The control head contains the internal speaker, the on/off/volume knob, the microphone connector, several buttons to operate the radio, three indicator Light Emitting Diodes (LED) to inform the user about the radio status, and an 8 character Liquid Crystal Display (LCD) for alpha - numerical information e.g. channel number or call address name. 9.3V LCD LED Backlight LED Indicators LCD Driver Level Shifter 9.
Control Head Model for CM300/PM400 3.3 2-5 Keypad Keys The control head keypad is a four-key design. All keys are configured as two analog lines read by µP. The voltage on the analog lines varies between 0V and 3.3 V depending on which key is pressed. If no key is pressed, the voltage at both lines is 3.3V. The key configuration can be thought of as a matrix where the two lines represent one row and one column. Each line is connected to a resistive divider powered by 3.3V.
2-6 THEORY OF OPERATION The HOOK line (J102-6) is used to inform the uP which type of microphone or SCI lead is connected to the microphone socket. The voltage of the HOOK line is monitored by the uP (port PE0, MIC_SENSE) through a resistor divider on the main board. When the HOOK line is grounded (on hook condition) or floating (2.8V nominal), the uP sets the mux (U8) for keypad operation to allow the use of microphones with a keypad. When the HOOK line is connected to 9.
Chapter 3 TROUBLESHOOTING CHARTS 1.0 1.1 Control Head CM200 Troubleshooting Chart Control Head Failure Control Head Check Back light OK ? Check 9.
3-2 1.2 TROUBLESHOOTING CHARTS Button/Tones Select Error (Page 1 of 2) Button/Tones Check Check Voltage Levels on TP401 (Keypad Col) and TP402 (Keypad Row) (see table on next page) Right Voltage Up Key No Check R846, R811 on Control Head ? YES Right Voltage No on Down Key ? Check R845, R810 on Control Head YES Right Voltage on P1/P2 Keys ? No Check R813, R814 on Control Head YES Connect DTMF Mic to TELCO Connector Is there 0.
Control Head CM200 Troubleshooting Chart Button/Tones Select Error (Page 2 of 2) A Right Voltage on DTMF keys ? Does Q812 on Control Head operates well ? No YES Key_Col Voltage (TP401) No Replace Q812 YES Replace U803 on Control Head Button/Tones Keys Okay Key_Row Voltage TP402 1.3 3-3 Key_Column Voltage TP401 0.008 V 0.675 V 1.346 V 1.997 V 2.650 V 0.008 V Up 0.675 V 1 2 3 1.346 V 4 5 6 7 1.997 V 8 9 0 * 2.650 V # C B A Left Key P1 Right Key P2 3.300 V 3.
3-4 2.0 2.1 TROUBLESHOOTING CHARTS Control Head CM300/PM400 Troubleshooting Chart Control Head Failure Control Head Check Back light OK ? Check 9.3V on Q12, U1 and associated parts and U8 No YES Power-up Alert Tone OK ? No Check Speaker Connection No Check Q8-Q10, U8 and 9.3V YES Indicator LED’S OK ? YES Display OK? No Check LCD connections, U3 for 5V, Osc.
Control Head CM300/PM400 Troubleshooting Chart 2.2 3-5 Button/Tones Select Error (Page 1 of 2) Button/Tones Check Check Voltage Levels on TP401 (Keypad Col) and TP402 (Keypad Row) (see table on next page) Right Voltage Up Key? No Check R13, R45 on Control Head No Check R12, R49 on Control Head No Check R31, R29 R51, R11 on Control Head YES Right Voltage on Down Key? YES Right Voltage on P1-P4 Keys ? YES Connect DTMF Mic to TELCO Connector Is there 0.
3-6 Button/Tones Select Error (Page 2 of 2) A Right Voltage on DTMF keys ? Does Q41 on Control Head operates well ? No YES Key_Col Voltage (TP401) No Replace Q41 YES Replace U8 on Control Head Button/Tones Keys Okay Key_Row Voltage TP402 2.3 TROUBLESHOOTING CHARTS Key_Column Voltage TP401 0.008 V 0.675 V 1.346 V 1.997 V 2.650 V 0.008 V Up 0.675 V 1 2 3 1.346 V 4 5 6 7 1.997 V 8 9 0 * 2.650 V # C B A Left Key P1 Right Key P2 P3 P4 3.300 V 3.
Chapter 4 CONTROLHEAD PCB / SCHEMATICS / PARTS LISTS 1.
4-2 CONTROLHEAD PCB / SCHEMATICS / PARTS LISTS Notes
Control Head CM200 - PCB 8488998U01 / Schematics Control Head CM200 - PCB 8488998U01 / Schematics D802 D801 D803 J804 DS801 D806 SH1 J805 J802 S802 D805 D804 S801 Top Side SHOWN FROM SIDE 1 8488998u01_p3 C814 C802 C801 C813 C803 C805 C804 C811 C806 C812 C809 C807 C810 C808 R808 R818 R809 R819 R820 Bottom Side SHOWN FROM SIDE 2 Q802 R807 R806 Q801 C822 C821 C820 C819 VR802 VR804 R833 M804 C818 C816 C817 M802 C815 1 R840 R801 R804 R834 VR803 C823 R805 R80
4-4 Control Head CM200 - PCB 8488998U01 / Schematics D3_3V R842 R847 10.K 10.K 1 C825 C824 M801 100n 220.p THESE ARE THE 1 BI M802 ESD PROTECTION D3_3V 1 M803 CONTACTS (SPRINGS) DNP 1 M804 9_3V C826 DS801 C827 R829 R843 100n 10.K 10.K DNP 9_3V R821 33. R822 33. 220.p D3_3V 16 HDSP-513G ANODE_A R819 R820 3.9K 680. 680. ANODE_D 10 A2 LE B2 BI C2 U802 LT 4 ANODE_G ANODE_DP 33. R826 33. R827 33.
Control Head CM200 - PCB 8488998U01 / Schematics 2.
Control Head CM300/PM400 PCB 8489714U01 C33 R22 C18 R21 C2 R17 R16 R54 R31 VR2 R3 Q41 1 VR1 VR3 16 C34 Q14 C5 R33 R43 D9 D20 S2 C3 R48 R12 R25 D26 S1 1 1 1 1 D4 S4 C29 M1 R13 R46 R45 R44 R18 C17 4 5 S3 C42 R38 R34 R50 R19 R27 R26 U1 C24 1 8 3 D12 D13 D23 D25 D22 D11 D16 D15 D14 D17 D21 D8 D5 D27 D3 D24 DS1 R42 J103 R36 R49 C45 C8 C44 C46 C48 C47 C50 C27 C4 C49 C38 C51 C52 C53 C55 C54 C41 1 R35 Q13 R41 C56 R40 R14
Control Head CM300/PM400 - PCB 8489714U01 / Schematics 4-7 D3_3V COM3 4 COM2 3 COM1 2 COM0 1 9_3V R37 47K SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 DS1 LCD_36PIN DNF R36 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 5V_CH Q14 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 1
4-8 3.
M CM200/CM300/PM400 Radios UHF2 (438-470 MHz) 1-25 W Service Information Issue: November, 2007
ii Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form, the copyrighted computer program.
iii Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM200/CM300/PM400 Model Chart....................................................................1-1 2.0 Technical Specifications ......................................................................................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ..........................................................................................................2-1 2.0 UHF (438-470 MHz) Receiver .....................
iv 8.3 Dual Tone Multiple Frequency (DTMF) Data............................................. 2-18 9.0 Receive Audio Circuits....................................................................................... 2-19 9.1 Squelch Detect .......................................................................................... 2-19 9.2 Audio Processing and Digital Volume Control ........................................... 2-20 9.3 Audio Amplification Speaker (+) Speaker (-) ..................................
v UHF2 (438-470 MHz) 1-25 W Power Control Circuit ........................................4-18 2.1 UHF2 PCB 8488978U01 (rev. P9) Parts List 1-25 W ................................4-19 3.0 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics .........................4-30 UHF2 Interconnection between Main Board and Power Amplifier Compartment ..........................................................................4-30 UHF2 (438-470 MHz) 1-25 W 848668Z02 (Rev. A), Top Side .........................
vi Notes
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.
1-2 2.0 MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification Frequency Range: Frequency Stability (-30°C to +60°C, 25°C Ref.) UHF2 438-470 MHz ±2.5 PPM Channel Capacity: CM200 - 4 CM300 - 32 PM400 - 64 Channel Spacing: 12.5/20/25 kHz Power Supply: Dimensions (L x W x H) Weight FCC Description Operating Temperature 13.8 Vdc (11 Vdc - 16.6 Vdc) negative Vehicle ground 4.65” X 6.67” X 1.73” (118mm X 169.
Technical Specifications 1-3 Transmitter Specification UHF2 Power Output 1-25W Conducted/Radiated Emissions: -36 dBm < 1 GHz -30 dBm > 1 GHz Audio Response: (from 6 dB/ oct. Pre-Emphasis, 300 to 3000Hz) TIA603 and CEPT Tx Audio Distortion < 3% Modulation Limiting: ±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 25 kHz FM Hum and Noise: -35 dB@12.5 kHz -40 dB@25 kHz Receiver Specification Sensitivity (12 dB SINAD): UHF2 0.35 μV @ 12.5 kHz 0.3 μV @ 25 kHz Intermodulation: 60 dB@12.
1-4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes
Chapter 2 THEORY OF OPERATION 1.0 Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual. 2.0 UHF (438-470 MHz) Receiver 2.1 Receiver Front-End The received signal is applied to the radio’s antenna input connector and routed through the harmonic filter and antenna switch.
2-2 THEORY OF OPERATION 2.2 Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz. The second LO uses the external crystal Y301. The second IF signal is amplified and filtered by two external ceramic filters (FL303/FL302 for 12.5 kHz channel spacing and FL304/FL301 for 25 kHz channel spacing).
UHF Transmitter Power Amplifier (438-470 MHz) 2-3 power of the PA.Op-amp U103-3 monitors the drain current of U101 via resistor R122 and adjusts the bias voltage of U101. In receive mode, the DC voltage from RX_EN line turns on Q101, which in turn switches off the biasing voltage to U101. 3.2 Power Controlled Driver Stage The next stage is an LDMOS device (Q105) which provides a gain of 12 dB. This device requires a positive gate bias and a quiescent current flow for proper operation.
2-4 3.6 THEORY OF OPERATION Harmonic Filter Inductors L111 and L113 along with capacitors C1011, C1023, C1020 and C1016 form a low-pass filter to attenuate harmonic energy coming from the transmitter. Resistor R150 along with L126 drains any electrostatic charges that might otherwise build up on the antenna. The harmonic filter also prevents high level RF signals above the receiver passband from reaching the receiver circuits to improve spurious response rejection. 3.
UHF (438-470 MHz) Frequency Synthesis 2-5 This oscillator is temperature compensated to an accuracy of +/-2.5 PPM from -30 to 60 degrees C. The temperature compensation scheme is implemented by an algorithm that uses five crystal parameters (four characterize the inverse Bechmann voltage curve and one for frequency accuracy of the reference oscillator at 25 degrees C). This algorithm is implemented by the LVFRAC-N (U200) at the power up of the radio.
2-6 THEORY OF OPERATION 4.3 Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) consists of the VCO/Buffer IC (VCOBIC, U201), the TX and RX tank circuits, the external RX buffer stages, and the modulation circuitry.
UHF (438-470 MHz) Frequency Synthesis 4.4 2-7 Synthesizer Operation The synthesizer consists of a low voltage FRAC-N IC (LVFRAC-N), reference oscillator, charge pump circuits, loop filter circuit, and DC supply. The output signal (PRESC_OUT) of the VCOBIC (U201, pin 12) is fed to the PREIN, pin 32 of U200 via a low pass filter which attenuates harmonics and provides a correct input level to the LVFRAC-N in order to close the synthesizer loop.
2-8 5.0 THEORY OF OPERATION Controller Theory of Operation This section provides a detailed theory of operation for the radio and its components. The main radio is a single-board design, consisting of the transmitter, receiver, and controller circuits. A control head is connected by an extension cable. The control head contains LED indicators, a microphone connector, buttons, and speaker.
Controller Theory of Operation 2-9 The DC voltage applied to connector P2 supplies power directly to the following circuitry: • Electronic on/off control • RF power amplifier • 12 volts P-cH FET -U514 • 9.3 volt regulator • Audio PA Ignition Auto On/Off Switch Control B+ Control Head RF_PA Audio_PA Mic Connector Ferrite Bit Filt_B+ Antenna Switch Power Control 500mA FET P-CH On/Off Control SW_Filt_B+ 11-16.6 V 0.
2-10 THEORY OF OPERATION Voltage regulator U503 provides 5 V for the RF circuits. Input and output capacitors are used to reduce the high frequency noise and provide proper operation during battery transients. 5.2 Protection Devices Diode VR500 acts as protection against ESD, wrong polarity of the supply voltage, and load dump. VR692 - VR699 are for ESD protection. 5.3 Automatic On/Off The radio can be switched ON in any one of the following three ways: 5.3.1 • On/Off switch.
Controller Theory of Operation 2-11 While the radio is switched on, the µP monitors the voltage at the emergency input on the accessory connector via U403-pin 62. Three different conditions are distinguished: no emergency kit is connected, emergency kit connected (unpressed), and emergency press. If no emergency switch is connected or the connection to the emergency switch is broken, the resistive divider R5030 / R5049 will set the voltage to about 3.
2-12 5.5 THEORY OF OPERATION Serial Peripheral Interface (SPI) The µP communicates to many of the IC’s through its SPI port. This port consists of SPI TRANSMIT DATA (MOSI) (U403-pin100), SPI RECEIVE DATA (MISO) (U403-pin 99), SPI CLK (U0403-pin1) and chip select lines going to the various IC’s, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI RECEIVE DATA) is sent.
Controller Theory of Operation 5.8 2-13 Normal Microprocessor Operation For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory. In normal operation of the radio the µP is operating in expanded mode as described below.
2-14 5.9 THEORY OF OPERATION Static Random Access Memory (SRAM) The SRAM (U402) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off. The device allows an unlimited number of write cycles. SRAM accesses are indicated by the CS signal U402 (which comes from U403-CSGP2) going low.
Transmit Audio Circuits 7.0 2-15 Transmit Audio Circuits J2 24kOhms U509 15 MIC 46 35 P1 48 2 FLAT TX AUDIO MIC INT GCB3 MIC EXT U509 5 36 TX RTN MUX CONTROL HEAD CONNECTOR EXT MIC 44 TX SND 42 MUX AUX TX ACCESSORY CONNECTOR FILTERS AND PREEMPHASIS MIC ASFIC_CMP IN U504 LIMITER HS SUMMER SPLATTER FILTER LS SUMMER 38 GCB5 FLAT TX AUDIO MUTE VCO ATN ATTENUATOR MOD IN 40 TO RF SECTION (SYNTHESIZER) Figure 2-7 Transmit Audio Paths 7.
2-16 7.1.2 THEORY OF OPERATION Standard Microphone Hook Pin is shorted to the hook mic inside the standard Mic, If the mic is out off hook, 3.3 V is routed to R429 via R458, D401, and it create 0.7 V on MIC_SENSE (u.P U403-67) by Voltage Divider R429/R430. U403 senses this voltage and sends command to ASFIC_CMP U504 to get GCB3 =‘1’.
Transmit Signalling Circuits 8.
2-18 8.2 THEORY OF OPERATION High Speed Data High speed data refers to the 3600 baud data waveforms, known as Inbound Signaling Words (ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC CMP (U504) to the proper filter and gain settings. It then begins strobing U504-pin 19 (HSIO) with a pulse when the data is supposed to change states.
Receive Audio Circuits 9.0 2-19 Receive Audio Circuits ACCESSORY CONNECTOR 11 1 AUDIO PA U502 9 4 SPKR + 16 SPKR - 1 EXTERNAL SPEAKER 6 INT SPKR+ INT SPKRCONTROL HEAD CONNECTOR 19 MUTE U509 FLT RX AUDIO P1 INTERNAL SPEAKER 20 J2 18 HANDSET AUDIO U505 37 39 10 GCB4 U IO 43 AUX RX 14 41 URX OUT AUDIO GCB1 VOLUME ATTEN.
2-20 9.2 THEORY OF OPERATION Audio Processing and Digital Volume Control The receiver audio signal (DISC AUDIO) enters the controller section from the IF IC where it is.DC coupled to ASFIC CMP via the DISC input U504-pin 2.
Receive Signalling Circuits 9.4 2-21 Handset Audio Certain handheld accessories have a speaker within them which require a different voltage level than that provided by U502. For these devices HANDSET AUDIO is available at control head connector J2 pin18. The received audio from the output of the ASFIC CMP’s digital volume attenuator is routed to U505 pin 2 where it is amplified. This signal is routed from the output of the op-amp U505 to J2-pin 18.
2-22 THEORY OF OPERATION The low speed limited data output (PL, DPL, and trunking LS) appears at U504-pin18, where it connects to the µP U403-pin 80. The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC CMP stores one bit every clock cycle. The external capacitors C5028, and C5026 set the low frequency pole for a zero crossings detector in the limiters for PL and HS data.
Chapter 3 TROUBLESHOOTING CHARTS This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio. Most troubleshooting charts end up by pointing to an IC to replace.
3-2 1.
Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) 1.
3-4 2.
Troubleshooting Flow TX RF (No Output Power) 2.
3-6 2.
Troubleshooting Flow Chart for Synthesizer 3.0 3-7 Troubleshooting Flow Chart for Synthesizer Start NO Correct Problem Check D200, D201, C2026, C2025, & C2027 5V at U200 pins 5, 20, 34 & 36 Visual check of the Board OK? NO Check 5V Regulator U503 YES YES YES 5V at pin 6 of D200 NO Is U200 Pin 47 at = 13VDC ? NO +5V at U200 Pin’s 13 & 30 ? NO YES Check R228 Check R201 Is U201 Pin 19 <40 mVDC in RX & >4.
3-8 TROUBLESHOOTING CHARTS 4.0 Troubleshooting Flow Chart for VCO RX VCO Low or no RF Signal at input to PA Low or no RF Signal at TP1 Visual check of board OK? NO Correct Problem NO Visual check of board OK? YES YES Make sure Synthesizer is working correctly and runner between U200 Pin 28 and U201 Pin 14 & and is OK NO 4.5V DC at U201 Pin 14 & 18 OK ? 4.5V DC at U201 Pin 14&18 OK ? NO YES YES 35mV DC at U201 Pin 19 OK? TX VCO Check runner between U200 Pin 2 and U201 Pin 19 NO NO 4.
Troubleshooting Flow Chart for DC Supply (1 of 2) 5.0 3-9 Troubleshooting Flow Chart for DC Supply (1 of 2) Since the failure of a critical voltage supply might cause the radio to automatically power down, supply voltages should first be probed with a multimeter. If all the board voltages are absent, then the voltage test point should be retested using a rising-edge-triggered oscilloscope. If the voltage is still absent, then another voltage should be tested using the oscilloscope.
3-10 5.1 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for DC Supply (2 of 2) D3_3V Check VDC on C5007 Go to Digital Section Replace U510 Yes Yes V=3.3V ? 9v
Chapter 4 UHF2 PCB/ SCHEMATICS/ PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards 1.1 UHF2 and Controller Circuits The UHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for both the UHF circuits and the Controller circuits. The PCB component layouts and the Parts Lists in this Chapter show both the Controller and UHF circuit components.
4-2 UHF2 PCB/ SCHEMATICS/ PARTS LISTS Notes
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 2.0 4-3 UHF 1-25 W Band 2 PCB 8488978U01 (rev.
4-4 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 8488978U01_P9 R440 C621 C628 C629 R602 R5087 C620 C622 R601 C623 C632 C631 C625 C662 C624 R610 C678 R5085 C5021 C5033 R5022 9 1 OL OL SHOWN FROM SIDE 1 UHF2 (438-470 MHz) 1-25 W 8488978U01 (rev.
UHF 1-25 W Band 2 PCB 8488978U01 (rev.
4-6 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics FILT_SW_B+ D3_3V D3_3V TX_EN SPI_CLK SPI_MOSI TO SHEET 1 FILT_SW_B+ SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS DIGITAL CH_ACT SQ_DET LSIO HSIO F1200 uP_CLK DNP NC ELP ONLY SHIFT_R_CS COMM_DATA_SEL_CH KEYPAD_COL_CH KEYPAD_ROW_CH SCI_CH BOOT_EN_IN_CH MIC_PTT_CH HOOK_CH DNP DNP 31 30 29 32 J3-31 J3-30 J3-29 J3-32 1 6 3 9 8 17 5 10 16 13 DISPLAY_DRIVER_CS_EN SHIFT_REG_CS 9.
UHF 1-25 W Band 2 PCB 8488978U01 (rev.
4-8 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics PA_FILT_B+ (SOURCE) L100 1019447 IF108 Place inside of the PA compartment 1 L119 1019447 COMP_B+ R186 IF109 5.1 R137 39.K C1000 C1112 120.p 39.p C1111 39.p 1 C1110 C1109 C1106 C1089 C1107 C1103 39.p 39.p 39.p 120.p 120.p 33n C1115 C1099 C1100 C1116 39.p 120.p 120.p 39.p C1027 10u C1053 180.p C1072 120.p FLT_9V C1040 1.n V_CTRL_PREDRIVER R130 0. 36.K 2.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 4-9 U102 LM2904 4 5 7 Current sense protection (option) 8 6 FILT_SW_B+_PA C1073 120.p CONTACTS FOR PA CLIP C1002 18.n 100.p Coupler width 2.032 7.5 C1011 39.p D104 D DNP S4 C1009 C1008 C1007 C1021 C1013 36.p 27.p 22.p 12.p 120.p 9.1p 8.2p M114 M113 1 C1026 L126 R150 6.2p 390.n 10K J11-3 3.3p 9.1p C1004 J11-2 6.8p C1020 C1023 DNP C1005 M112 J11-1 L111 17.n C1016 GND2 G 1 Antenna Connector 17.
4-10 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 5V 5V L217 C2026 10n 390nH R225 3V C2000 C2015 C2034 2.2uF 0.1uF 120.p 150. C2025 10n C2055 22p C2024 3V K3 A3 R228 K2 K1 A2 A1 100. 10n L200 C2198 390nH 1.n C2023 C2005 R226 150. D201 C2027 10n C2035 120.p 10n 2.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 4-11 V_SF L201 R231 51. 680nH R220 L209 510. 100.0n C2009 C2038 R235 C2040 100n 120.p 18. 120.p C2008 C2007 0.1uF 0.1uF C2042 C2041 120.p 120.p C2011 0.1uF V_SF C2021 L208 1.n 100.0n 2 C2064 3 6.2p 12p 4 5 6 16 D203 L211 C2069 L206 100.0n 1.2p 12.5n 15 20 C2057 19 5.1p R232 47. C2056 DNP SUPER_FLTR COLL_RFIN U201 50U54 RX_BASE RX_EMITTER TX_BASE FLIP_IN C2076 C2012 C2030 100.n 0.1uF 3.
4-12 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics FRONT-END SHIELD 9R 9V Q304 Q306 9V R334 3V R300 R346 10.K 3V R310 10.K 430. LOC_DIST 15.K C321 120.p 5V 5V R345 10.K Q300 R336 L304 220. C323 RX_EN 1n C350 120.p 150.n Q301 D305 MIXER SHIELD R331 L301 150.n SH300 SH301 SHIELD SHIELD C349 100. R326 2.7K 120.p C351 100n RX 1 1 R330 C326 820. 22.n R347 15. C341 4.7p C340 2.4p C345 3.9p C328 C370 Q303 43.p 24.p BFS540 C334 20.p C1121 5.6p C300 51.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 4-13 1 7 R315 12.K R306 U301 TC7W04F FL301 20.K FLTR C313 100n OUT 2 GND 1 IN 3 U301 TC7W04F 6 2 BW_SEL D302 1 IN 8 U301 PWR_GND R327 R324 2.4K 3.3K D301 FLTR OUT 2 R314 12.K GND Check if it is 3v or another value 3V R316 12.K FL302 R305 20.K C312 100n VCC 3 C316 GND 4 0.1uF R317 12.K R307 FL304 CFWC455D 20.K U301 TC7W04F 3V OUT 2 3 4 GND2 5 GND1 C317 0.1uF R318 C311 12.K R308 D303 20.
4-14 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics L120 1 1019447 IF502 COMP_B+ IF503 1 C1113 SOURCE FILT_B+ L500 C1097 39.p 120.p C1088 39.p 1019447 B+ ON_OFF C5000 C5061 C5084 C5086 100.n 120.p 22.n C5067 VR500 TP500 TEST_POINT 1 C5060 C5083 C5085 C5001 R5038 100.n 120.p 22.n 10.u 33.K 1n 28.0 39.p 9V ADJ SOURCE 1 9V R5081 6.34K C5005 C5015 C5074 C5095 C5096 C1087 1% 100.u 100n 120.p 220.p 220.p 39.p C1034 39.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 4-15 POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD DNP DNP R5024 100.K C5101 C5081 C5033 120.p 100n 1.n R5023 100.K FLAT_TX_AUDIO_INPUT_ACCESS_CONN R5025 3 C5032 3V R5057 R5067 6.2K C5027 100n U509 MC14053B R5034 10. 12 36K 47.K R5032 C5012 R5043 24.K EN X0 3 C5044 1u C5079 120.p U505 6 8 LM2904 7 RX_AUDIO_OUTPUT_ACCESS_CONN 5 VAG 15 Y 10 B 4 C5003 R5065 47u R5086 560. R5087 100.K 6.
4-16 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics D400 D3_3V R462 51. C410 100n R439 10.K TP404 TEST_POINT 1 SPI_MOSI TP410 TEST_POINT 1 SPI_MISO SPI_CLK LSIO 10.K 1 10.K SCI_CH TP406 TEST_POINT R450 R451 CH_ACT SQ_DET HSIO ASFIC_CS OPT_DATA_R_OPBD Q407 Q400 SYNTH_CS SPI_MISO SPI_MOSI SPI_CLK ASFIC_CS EE_CS SYNTH_CS DISPLAY_CS_CH SHIFT_R_CS LOC_DIST DO NOT CONNECT THIS CS IN ORDER TO PROVIDE WIRED OR OPERATION ON CSPROG R428 100.K PLACE NEAR U402 8 VR401 4.3 120.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 4-17 FILT_SW_B+ D3_3V R460 1.5K R401 2.7K Q403 PROG_OUT-ALARM_4 R444 TP405 TEST_POINT DNP DNP Q401 1 10.K D3_3V DNP BOOT_EN_IN_CH Q415 DNP R431 10.K DNP 33.K 6.80 R459 47.K D3_3V R436 VR400 R457 Q412 3.3K ACCESS_PTT C490 1.u R458 3.3K D401 D3_3V R445 HOOK_CH SCI_CH 10.K R421 220. R429 100.K MIC_SENSE 1 TP408 TEST_POINT Q414 D3_3V C418 120.p R430 39.K R435 33.K R456 Q411 3.
4-18 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics FILT_SW_B+ U100 LM2904 INTEGRATOR 1 4 IF701 L101 3 1 R141 22.K 8 C1071 2 1.u IF700 1 C1046 DET_VFWD 120.p 120.p C1082 39.p C1045 C1075 120.p 39.p R117 15K R140 27.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 2.1 UHF2 PCB 8488978U01 (rev. P9) Parts List 1-25 W Circuit Ref. Motorola Part No. Description C1000 2113740F53 CAP CHIP REEL CL1 +/30 120 C1001 2311049A08 KEMET CAPS C1002 2111078B42 CAP CHIP RF 100 5 NPO 100V 4-19 Circuit Ref. Motorola Part No.
4-20 Circuit Ref. UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description C1098 2113740F53 CAP CHIP REEL CL1 +/30 120 C1121 2113740F21 CAP CHIP REEL CL1+/30 5.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Circuit Ref. Motorola Part No. Description 4-21 Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description C2043 2113740L14 CAP CER CHIP 6.8PF +0.1PF C2063 2113740L16 CAP CER CHIP 8.2 PF+0.1PF C2129 2113740F53 CAP CHIP REEL CL1 +/30 120 C324 2113740F53 CAP CHIP REEL CL1 +/30 120 C2044 NOT PLACED GCAM DUMMY PART NUMBER C2064 2113740L13 CAP CER CHIP 6.
4-22 Circuit Ref. UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Motorola Part No. Description Circuit Ref. Motorola Part No. Description C345 2113740L08 CAP CER CHIP 3.9 PF+/0.1PF C367 2113740L16 CAP CER CHIP 8.2 PF+0.1PF C346 2113740L09 CAP CER CHIP 4.3 PF +0.1PF C368 2113740F25 CAP CHIP REEL CL1+/30 8.2 C347 2113740L07 CAP CER CHIP 3.6PF +0.1PF C369 2113740F25 CAP CHIP REEL CL1+/30 8.2 C348 2113740L06 CAP CER CHIP 3.3 PF+/0.1PF C370 2113740L27 CAP 24.0 PF 50V 2.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Circuit Ref. Motorola Part No. Description C5046 2113743E20 CAP CHIP. 10 UF 10% C5047 2113743E20 CAP CHIP. 10 UF 10% C5048 2113743E20 CAP CHIP. 10 UF 10% C5049 2113743E20 CAP CHIP. 10 UF 10% C5050 2113743E20 CAP CHIP. 10 UF 10% C5051 2113743E20 CAP CHIP. 10 UF 10% (Not used in GM3188/ GM3189) C5052 2113743E20 CAP CHIP. 10 UF 10% C5053 2113743E20 CAP CHIP. 10 UF 10% (Not used in GM3188/ GM3189) C5054 2113743E20 CAP CHIP.
4-24 Circuit Ref. UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Circuit Ref. Motorola Part No. 4-25 Circuit Ref. Description Motorola Part No. Description Circuit Ref. Motorola Part No. Description L209 2413926N24 IND CER CHIP 100.0 NH 5% L313 2460591C35 COIL AIR WOUND INDUC 18.08 Q103 4813824A06 XSTR NPN 30V DARLINGTON L210 2413926N18 IND CER CHIP 33.0 NH 5% L314 2460591C35 COIL AIR WOUND INDUC 18.08 Q105 4886212B01 LDMOS PWR TSTR MRF1518 L211 2413926N24 IND CER CHIP 100.
4-26 Circuit Ref. UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Motorola Part No. Description R127 0662057C03 CHIP RES 1.0 OHMS 5% R128 0662057C03 CHIP RES 1.0 OHMS 5% R130 0662057B47 CHIP RES 0 OHMS +-.050 OHMS R131 0662057A97 CHIP RES 100K OHMS 5% R134 0662057A59 CHIP RES 2700 OHMS 5% R135 0662057A88 CHIP RES 43K OHMS 5% Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Circuit Ref. Motorola Part No. Description 4-27 Circuit Ref. Motorola Part No. Description R320 0662057A73 CHIP RES 10K OHMS 5% R403 0662057B47 R321 0662057A71 CHIP RES 8200 OHMS 5% CHIP RES 0 OHMS +-.050 OHMS R404 0662057B47 CHIP RES 4700 OHMS 5% CHIP RES 0 OHMS +-.050 OHMS R405 0662057B47 CHIP RES 0 OHMS +-.050 OHMS R322 R323 R324 R325 R326 R327 0662057A65 0662057A65 0662057A61 0662057A61 0662057A59 0662057A58 Circuit Ref.
4-28 Circuit Ref. UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Motorola Part No. Description R5023 0662057A97 CHIP RES 100K OHMS 5% R5024 0662057A97 CHIP RES 100K OHMS 5% (Not used in GM3188/ GM3189) R5025 0662057A97 Circuit Ref. Motorola Part No.
UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Circuit Ref. Motorola Part No. Description 4-29 Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description U102 5113818A01 IC LOW COST SING SPLY LM2904DR U509 5113806A20 IC MUX/DEMUX TRIPLE 2-CHNL VR697 4813830A75 DIODE DUAL COM ANODE U103 5113819A04 IC QD OP AMP GEN PURP MC3303D U510 5104187K94 IC LP2986ILDX-3.
4-30 3.0 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics UHF 1-25 W Band 2 PCB 8486684Z02 (Rev.
SH202 VR504 SH200 D401 R5066 C5010 U505 C5028 4 C5020 C5013 C5076 C5048 43 6 C5071 R5075 C5102 C5025 C5103 R5009 R5084 C1123 9 R5018 C5005 R5063 1 R461 D502 C5034 C5029 C5044 16 C5053 R5064 R5040 C5001 R5074 R5089 C5111 R5048 C624 R610 C678 C662 C5110 R5039 C1065 C1104 R440 R406 1 15 C626 16 C621 C628 R602 C629 R5087 C622 C620 R601 C630 C623 C631 C632 C633 C627 C625 L119 C1116 C1100 2 R5073 Q500 R5082 D500 Q503 R5085 C5038 D513 R5081 C5096 C50
C1112 R107 VR102 D105 R118 C1035 R172 C1067 R103 L100 C1076 R104 C1101 D106 R185 R108 VR101 D102 C1050 R183 Q103 C1079 R160 C1080 R119 C1036 C1029 R181 C1081 C1059 R161 C1077 R157 C1109 C1130 C1111 C1078 L302 C339 R340 L309 L310 C370 T300 3 C353 C338 R213 C2022 C2009 R215 L201 Q301 R326 C349 R330 R310 R336 R331 R347 L301 Q303 C326 C346 C331 C357 C355 C342 C330 SH301 C347 C332 C321 C344 L313 R334 C348 C343 L311 D305 C358 R338 R223 R227 R2
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics FILT_SW_B+ D3_3V D3_3V TX_EN SPI_CLK SPI_MOSI TO SHEET 1 FILT_SW_B+ 4-33 SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS DIGITAL CH_ACT SQ_DET LSIO HSIO F1200 uP_CLK DNP NC ELP ONLY SHIFT_R_CS COMM_DATA_SEL_CH KEYPAD_COL_CH KEYPAD_ROW_CH SCI_CH BOOT_EN_IN_CH MIC_PTT_CH HOOK_CH C603 C604 C605 1n 1n 1n DNP DNP 31 30 29 32 J3-31 J3-30 J3-29 J3-32 1 6 3 9 8 17 5 10 16 13 DISPLAY_DRIVER_CS_EN SHIFT_REG_CS 9.
4-34 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics 4-35 PA_FILT_B+ (SOURCE) L100 1019447 IF108 Place inside of the PA compartment L119 1019447 1 COMP_B+ R186 5.1 R137 C1000 120.p 39.K C1112 39.p C1110 39.p C1111 39.p C1109 39.p C1089 120.p C1106 39.p IF109 1 C1103 33n C1107 120.p C1099 120.p C1115 39.p C1100 120.p C1116 39.p C1027 10u C1053 180.p C1072 120.p MC3303 U103 4 8 V_CTRL_PREDRIVER FLT_9V C1040 1.n DNP U102 LM2904 R122 4.7 C1060 120.p 11 FLT_9V R138 36.K R168 2.
4-36 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics U102 LM2904 7 Current sense protection (option) FILT_SW_B+_PA C1073 120.p 1019447 L115 18.n M113 M114 1 1 1 1 GND L117 M112 CONTACTS FOR PA CLIP M4 PLTD_HOLE3_5x7_0_TRIMMED M111 8 6 1 4 5 C1002 100.p C1011 39.p Coupler width 2.032 7.5 D104 Antenna Connector L113 17.n J11-1 Q100 D V_forward GND1 GND2 DNP DNP G S1 S2 S3 S4 C1005 36.p C1004 27.p C1009 22.p C1008 10.p C1023 7.5p DNP C1007 120.p C1021 5.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics 4-37 5V 5V L217 390nH 3V 3V C2026 10n R225 150. C2034 120.p C2015 0.1uF C2000 2.2uF C2025 10n C2055 22p C2024 10n L200 390nH C2198 1.n C2005 2.2uF C2023 10n K3 K2 K1 5 34 20 36 13 47 NC 8 CLK 9 CEX 10 7 30 SYNTH_CS 35 21 MOD_IN 40 39 SPI_MOSI PD_VDD PRE_VDD AVDD DVDD VRO VCP SPI_CLK 19 FREFOUT 41 MODOUT 37 TEST1 38 TEST2 C2045 120.p 18 REFSEL 42 CCOMP C2006 2.
4-38 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics V_SF L201 680nH R231 51. C2009 100n C2038 120.p C2040 R235 18. 120.p C2008 0.1uF L209 100.0n C2042 120.p C2007 0.1uF R220 510. C2011 0.1uF C2041 120.p V_SF C2021 1.n L208 100.0n C2022 10n C2069 4.3p L206 8n 9 GND_FLAG 11 GND_BUFFERS 17 GND_LOGIC L211 22n C2057 5.1p L203 150.n DNP DNP C2076 100.n C2012 0.1uF C2056 5.1p C2030 3900pF L204 150.n R215 3.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics 4-39 FRONT-END SHIELD 9R 9V Q304 Q306 9V R334 430. 3V R346 10.K 3V R300 10.K LOC_DIST R310 15.K C321 120.p 5V 5V Q300 R345 10.K R336 220. C323 1n RX_EN L304 150.n C350 120.p Q301 D305 MIXER SHIELD SH300 SH301 SHIELD SHIELD 1 C349 120.p L301 150.n R326 2.7K DNP C300 51.p C340 3.6p C345 2.0p C328 47.p C334 8.2.p CR301 L300 18.08n C338 18.p C335 20.p DNP C353 82.p DNP C357 36.p C327 330p T300 6 XFMR 1 R338 100.
4-40 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics 1 7 R306 20.K U301 TC7W04F C313 100n R315 12.K FL301 FLTR OUT 2 GND 1 IN 6 BW_SEL 3 U301 TC7W04F 2 D302 1 IN 8 R314 12.K GND R327 2.4K PWR_GND VCC C316 0.1uF 4 GND R307 20.K R317 12.K FL304 CFWC455D U301 TC7W04F 1 IN 3V OUT 2 3 R339 51. C304 100n TO SHEET 2 FL300 FLTR_44.85M FREQ GND2 C362 18.p OUT 6 4 2 CC1 5 CC2 1 GND1 3 IN C337 6.8p R322 4.7K GND 15 R329 1.2K Y300 45B02 455KHz C315 100n L305 1.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics 4-41 L120 1 1019447 IF502 COMP_B+ IF503 1 C1113 SOURCE FILT_B+ L500 C1097 39.p 120.p C1088 39.p 1019447 ON_OFF C5061 C5084 C5086 100.n 120.p 22.n C5067 VR500 TP500 TEST_POINT 1 C5060 C5083 C5085 C5001 R5038 100.n 120.p 22.n 10.u 33.K 1n 28.0 9V ADJ SOURCE 1 9V R5081 6.34K C5005 C5015 C5074 C5095 C5096 C1087 1% 100.u 100n 120.p 220.p 220.p 39.p C1034 39.p C1122 C1123 C1124 C1125 C1127 39.p 39.
4-42 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD DNP DNP R5024 100.K C5101 C5081 C5033 120.p 100n 1.n R5023 100.K FLAT_TX_AUDIO_INPUT_ACCESS_CONN R5025 3 C5032 3V R5057 R5067 3V 6.2K C5057 R5009 C5027 0. 100n U509 MC14053B R5080 12 36K R5034 10. 47.K R5032 C5012 3 C5052 100n Z1 C5044 1u C5079 120.p U505 6 8 LM2904 7 RX_AUDIO_OUTPUT_ACCESS_CONN 5 VAG 15 Y 10 B 4 C5003 R5065 47u R5086 560. R5087 100.K 6.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics 4-43 D400 D3_3V R462 51. C410 R450 R451 100n R439 10.K TP404 TEST_POINT TP410 TEST_POINT 1 SPI_MOSI 1 SPI_MISO SPI_CLK LSIO 10.K 1 10.K SCI_CH TP406 TEST_POINT CH_ACT SQ_DET HSIO ASFIC_CS OPT_DATA_R_OPBD Q407 Q400 SYNTH_CS SPI_MISO SPI_MOSI SPI_CLK ASFIC_CS EE_CS SYNTH_CS DISPLAY_CS_CH SHIFT_R_CS LOC_DIST DO NOT CONNECT THIS CS IN ORDER TO PROVIDE WIRED OR OPERATION ON CSPROG R428 100.K D3_3V PLACE NEAR U402 C402 120.
4-44 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics FILT_SW_B+ D3_3V R460 1.5K R401 2.7K Q403 PROG_OUT-ALARM_4 R444 TP405 TEST_POINT DNP DNP Q401 1 10.K D3_3V DNP BOOT_EN_IN_CH Q415 DNP R431 10.K DNP 33.K 6.80 R459 47.K D3_3V R436 VR400 R457 Q412 3.3K ACCESS_PTT C490 1.u R458 3.3K D401 D3_3V R445 HOOK_CH SCI_CH 10.K R421 220. R429 100.K MIC_SENSE 1 TP408 TEST_POINT Q414 D3_3V C418 120.p R430 39.K R435 33.K R456 Q411 3.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics 4-45 FILT_SW_B+ U100 LM2904 INTEGRATOR 1 4 IF701 L101 3 1 R141 22.K 8 C1071 2 1.u IF700 1 C1046 DET_VFWD 120.p 120.p C1082 39.p C1045 C1075 120.p 39.p R117 15K R140 27.
4-46 3.1 UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics UHF2 PCB 8486684Z02 (Rev. A) Parts List 1-25 W Circuit Ref. Motorola Part No. Description C1000 2113740F53 CAP CHIP REEL CL1 +/30 120 C1001 2311049A08 KEMET CAPS C1002 2111078B42 CAP CHIP RF 100 5 NPO 100V Circuit Ref. Motorola Part No.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Circuit Ref. Motorola Part No. Description 4-47 Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description C1099 2113740F53 CAP CHIP REEL CL1 +/30 120 C1121 2113740F21 CAP CHIP REEL CL1+/30 5.
4-48 Circuit Ref. UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Circuit Ref. Motorola Part No. Description 4-49 Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description C347 2113740L07 CAP CER CHIP 3.6PF +0.1PF C369 2113740F25 CAP CHIP REEL CL1+/30 8.2 C490 NOT PLACED GCAM DUMMY PART NUMBER C348 2113740L06 CAP CER CHIP 3.3 PF+/0.1PF C370 2113740L27 CAP 24.0 PF 50V 2.
4-50 Circuit Ref. UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Motorola Part No. Description C5049 2113743E20 CAP CHIP. 10 UF 10% C5050 2113743E20 CAP CHIP. 10 UF 10% C5051 2113743E20 CAP CHIP. 10 UF 10% (Not used in GM3188/ GM3189) C5052 2113743E20 CAP CHIP. 10 UF 10% C5053 2113743E20 CAP CHIP. 10 UF 10% (Not used in GM3188/ GM3189) C5054 2113743E20 CAP CHIP. 10 UF 10% (Not used in GM3188/ GM3189) Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Circuit Ref. Motorola Part No. Description 4-51 Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description C613 2113740F41 CAP CHIP REEL CL1 +/30 39 C632 2113740F41 CAP CHIP REEL CL1 +/30 39 D400 4813833C07 DIODE DUAL 100V ‘5C’ SERIES L107 2460591B04 COIL AIR WOUND INDUC 11.
4-52 Circuit Ref. UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Motorola Part No. Description Circuit Ref. Motorola Part No. Description L211 2413926N24 IND CER CHIP 100.0 NH 5% L315 NOT PLACED GCAM DUMMY PART NUMBER L212 2413926N18 IND CER CHIP 33.0 NH 5% L500 7686135U02 FLTR,EMI L501 7686135U02 FLTR,EMI L213 2413926N24 IND CER CHIP 100.0 NH 5% L502 7686135U02 FLTR,EMI L214 2413926H20 IND CHIP 47.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Circuit Ref. Motorola Part No. Description 4-53 Circuit Ref. Motorola Part No. Description Circuit Ref. Motorola Part No. Description R130 0662057B47 CHIP RES 0 OHMS +-.
4-54 Circuit Ref. UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Motorola Part No. Description Circuit Ref. Motorola Part No. Description R321 0662057A71 CHIP RES 8200 OHMS 5% R403 0662057B47 CHIP RES 0 OHMS +-.050 OHMS R322 0662057A65 CHIP RES 4700 OHMS 5% R404 0662057B47 CHIP RES 0 OHMS +-.050 OHMS R323 0662057A65 CHIP RES 4700 OHMS 5% R405 0662057B47 CHIP RES 0 OHMS +-.050 OHMS Circuit Ref. Motorola Part No.
UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Circuit Ref. Motorola Part No. Description R5021 0662057A97 CHIP RES 100K OHMS 5% R5022 0662057A97 CHIP RES 100K OHMS 5% R5023 0662057A97 CHIP RES 100K OHMS 5% R5024 0662057A97 CHIP RES 100K OHMS 5% (Not used in CM200) R5025 0662057A97 CHIP RES 100K OHMS 5% 4-55 Circuit Ref. Motorola Part No. Description R5047 0662057B47 CHIP RES 0 OHMS +-.
4-56 Circuit Ref. UHF 1-25 W Band 2 PCB 8486684Z02 (Rev. A) / Schematics Motorola Part No. Description R5087 0662057A97 CHIP RES 100K OHMS 5% R5088 0662057B47 CHIP RES 0 OHMS +-.050 OHMS R5089 NOT PLACED GCAM DUMMY PART NUMBER Circuit Ref. Motorola Part No.
M CM200/CM300/PM400 Radios UHF2 (438-470 MHz) 25-40 W Service Information Issue: November, 2007
ii Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form, the copyrighted computer program.
iii Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 CM200/CM300/PM400 Model Chart....................................................................1-1 2.0 Technical Specifications ......................................................................................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ..........................................................................................................2-1 2.0 UHF (438-470 MHz) Receiver .....................
iv 9.0 Receive Audio Circuits....................................................................................... 2-19 9.1 Squelch Detect .......................................................................................... 2-19 9.2 Audio Processing and Digital Volume Control ........................................... 2-20 9.3 Audio Amplification Speaker (+) Speaker (-) ............................................. 2-20 9.4 Handset Audio ............................................................
v 3.0 UHF 25-40 W Band 4 PCB 8486577Z03 / Schematics .....................................4-31 UHF2 Interconnection between Main Board and Power Amplifier Compartment .....................................................................................4-31 UHF 2 (438-470 MHz) 25-40 W 8486577Z03, Top Side ................................4-32 UHF2 (438-470 MHz) 25-40 W 8486577Z03, Bottom Side ..............................4-33 UHF2 (438-470 MHz) 25-40 W Main Circuit (Sht 1 of 2) .............................
vi Notes
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.
1-2 2.0 MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification Frequency Range: Frequency Stability (-30°C to +60°C, 25°C Ref.) UHF2 438-470 MHz ±2.5 PPM Channel Capacity: CM200 - 4 CM300 - 32 PM400 - 64 Channel Spacing: 12.5/25 kHz Power Supply: Dimensions (L x W x H) Weight FCC Description Operating Temperature 13.6 Vdc (10.88 Vdc - 16.32 Vdc) negative Vehicle ground 4.65” X 6.67” X 1.73” (118mm X 169.
Technical Specifications 1-3 Transmitter Specification UHF2 Power Output 25-40W Conducted/Radiated Emissions: -26 dBm Audio Response: (from 6 dB/ oct. Pre-Emphasis, 300 to 3000Hz) TIA603 and CEPT Tx Audio Distortion < 3% Modulation Limiting: ±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 25 kHz FM Hum and Noise: -35 dB@12.5 kHz -40 dB@25 kHz Receiver Specification Sensitivity (12 dB SINAD): UHF2 0.35 μV @ 12.5 kHz 0.3 μV @ 25 kHz Intermodulation: 60 dB@12.
1-4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes
Chapter 2 THEORY OF OPERATION 1.0 Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual. 2.0 UHF (438-470 MHz) Receiver 2.1 Receiver Front-End The received signal is applied to the radio’s antenna input connector and routed through the harmonic filter and antenna switch.
2-2 THEORY OF OPERATION 2.2 Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz. The second LO uses the external crystal Y301. The second IF signal is amplified and filtered by two external ceramic filters (FL303/FL302 for 12.5 kHz channel spacing and FL304/FL301 for 25 kHz channel spacing).
UHF Transmitter Power Amplifier (438-470 MHz) 2-3 power of the PA.Op-amp U103-3 monitors the drain current of U101 via resistor R122 and adjusts the bias voltage of U101. In receive mode, the DC voltage from RX_EN line turns on Q101, which in turn switches off the biasing voltage to U101. 3.2 Power Controlled Driver Stage The next stage is an LDMOS device (Q105) which provides a gain of 12 dB. This device requires a positive gate bias and a quiescent current flow for proper operation.
2-4 3.6 THEORY OF OPERATION Harmonic Filter Inductors L111, L113 and L128 along with capacitors C1011, C1023, C1020, C1016, C1025 and C1026 form a low-pass filter to attenuate harmonic energy coming from the transmitter. Resistor R150 along with L130 drains any electrostatic charges that might otherwise build up on the antenna. The harmonic filter also prevents high level RF signals above the receiver passband from reaching the receiver circuits to improve spurious response rejection. 3.
UHF (438-470 MHz) Frequency Synthesizer 2-5 parameters (four characterize the inverse Bechmann voltage curve and one for frequency accuracy of the reference oscillator at 25 degrees C). This algorithm is implemented by the LVFRAC-N (U200) at the power up of the radio. TCXO Y200, along with its corresponding circuitry R204, R205, R210, and C2053, are not placed as the temperature compensated crystal proved to be reliable. 4.
2-6 THEORY OF OPERATION 4.3 Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) consists of the VCO/Buffer IC (VCOBIC, U201), the TX and RX tank circuits, the external RX buffer stages, and the modulation circuitry.
UHF (438-470 MHz) Frequency Synthesizer 4.4 2-7 Synthesizer Operation The synthesizer consists of a low voltage FRAC-N IC (LVFRAC-N), reference oscillator, charge pump circuits, loop filter circuit, and DC supply. The output signal (PRESC_OUT) of the VCOBIC (U201, pin 12) is fed to the PREIN, pin 32 of U200 via a low pass filter which attenuates harmonics and provides a correct input level to the LVFRAC-N in order to close the synthesizer loop.
2-8 5.0 THEORY OF OPERATION Controller Theory of Operation This section provides a detailed theory of operation for the radio and its components. The main radio is a single-board design, consisting of the transmitter, receiver, and controller circuits. A control head is connected by an extension cable. The control head contains LED indicators, a microphone connector, buttons, and speaker.
Controller Theory of Operation 2-9 The DC voltage applied to connector P2 supplies power directly to the following circuitry: • Electronic on/off control • RF power amplifier • 12 volts P-cH FET -U514 • 9.3 volt regulator • Audio PA Ignition Auto On/Off Switch Control B+ Control Head RF_PA, 8.
2-10 THEORY OF OPERATION Voltage regulator U503 provides 5 V for the RF circuits. Input and output capacitors are used to reduce the high frequency noise and provide proper operation during battery transients. 5.2 Protection Devices Diode VR500 acts as protection against ESD, wrong polarity of the supply voltage, and load dump. VR692 - VR699 are for ESD protection. 5.3 Automatic On/Off The radio can be switched ON in any one of the following three ways: 5.3.1 • On/Off switch.
Controller Theory of Operation 2-11 While the radio is switched on, the µP monitors the voltage at the emergency input on the accessory connector via U403-pin 62. Three different conditions are distinguished: no emergency kit is connected, emergency kit connected (unpressed), and emergency press. If no emergency switch is connected or the connection to the emergency switch is broken, the resistive divider R5030 / R5049 will set the voltage to about 3.
2-12 5.5 THEORY OF OPERATION Serial Peripheral Interface (SPI) The µP communicates to many of the IC’s through its SPI port. This port consists of SPI TRANSMIT DATA (MOSI) (U403-pin100), SPI RECEIVE DATA (MISO) (U403-pin 99), SPI CLK (U0403-pin1) and chip select lines going to the various IC’s, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI RECEIVE DATA) is sent.
Controller Theory of Operation 5.8 2-13 Normal Microprocessor Operation For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory. In normal operation of the radio the µP is operating in expanded mode as described below.
2-14 5.9 THEORY OF OPERATION Static Random Access Memory (SRAM) The SRAM (U402) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off. The device allows an unlimited number of write cycles. SRAM accesses are indicated by the CS signal U402 (which comes from U403-CSGP2) going low.
Transmit Audio Circuits 7.0 2-15 Transmit Audio Circuits J2 24kOhms U509 15 MIC 46 35 P1 48 2 FLAT TX AUDIO MIC INT GCB3 MIC EXT U509 5 36 TX RTN MUX CONTROL HEAD CONNECTOR EXT MIC 44 TX SND 42 MUX AUX TX ACCESSORY CONNECTOR FILTERS AND PREEMPHASIS MIC ASFIC_CMP IN U504 LIMITER HS SUMMER SPLATTER FILTER LS SUMMER 38 GCB5 FLAT TX AUDIO MUTE VCO ATN ATTENUATOR MOD IN 40 TO RF SECTION (SYNTHESIZER) Figure 2-7 Transmit Audio Paths 7.
2-16 7.1.2 THEORY OF OPERATION Standard Microphone Hook Pin is shorted to the hook mic inside the standard Mic, If the mic is out off hook, 3.3 V is routed to R429 via R458, D401, and it create 0.7 V on MIC_SENSE (u.P U403-67) by Voltage Divider R429/R430. U403 senses this voltage and sends command to ASFIC_CMP U504 to get GCB3 =‘1’.
Transmit Signalling Circuits 8.
2-18 8.2 THEORY OF OPERATION High Speed Data High speed data refers to the 3600 baud data waveforms, known as Inbound Signaling Words (ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC CMP (U504) to the proper filter and gain settings. It then begins strobing U504-pin 19 (HSIO) with a pulse when the data is supposed to change states.
Receive Audio Circuits 9.0 2-19 Receive Audio Circuits ACCESSORY CONNECTOR 11 1 AUDIO PA U502 9 4 SPKR + 16 SPKR - 1 EXTERNAL SPEAKER 6 INT SPKR+ INT SPKRCONTROL HEAD CONNECTOR 19 MUTE U509 FLT RX AUDIO P1 INTERNAL SPEAKER 20 J2 18 HANDSET AUDIO U505 37 39 10 GCB4 U IO 43 AUX RX 14 41 URX OUT AUDIO GCB1 VOLUME ATTEN.
2-20 9.2 THEORY OF OPERATION Audio Processing and Digital Volume Control The receiver audio signal (DISC AUDIO) enters the controller section from the IF IC where it is.DC coupled to ASFIC CMP via the DISC input U504-pin 2.
Receive Signalling Circuits 9.4 2-21 Handset Audio Certain handheld accessories have a speaker within them which require a different voltage level than that provided by U502. For these devices HANDSET AUDIO is available at control head connector J2 pin18. The received audio from the output of the ASFIC CMP’s digital volume attenuator is routed to U505 pin 2 where it is amplified. This signal is routed from the output of the op-amp U505 to J2-pin 18.
2-22 THEORY OF OPERATION The low speed limited data output (PL, DPL, and trunking LS) appears at U504-pin18, where it connects to the µP U403-pin 80. The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC CMP stores one bit every clock cycle. The external capacitors C5028, and C5026 set the low frequency pole for a zero crossings detector in the limiters for PL and HS data.
Chapter 3 TROUBLESHOOTING CHARTS This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio. Most troubleshooting charts end up by pointing to an IC to replace.
3-2 1.
Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) 1.
3-4 2.0 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 40 W Transmitter (Sheet 1 of 3) START No or too low power when keyed Check components between Q100 and RF output, Antenna Switch D104, D103, VR102 and Q106 >4A Current increase when keyed? >500mA & <4A <500mA Check PA Stages Yes Control Voltage at TP150 >4Vdc? No Check 9.3V Regulator U501 No Voltage U103 pin 5 = 4.
Troubleshooting Flow Chart for 40 W Transmitter (Sheet 1 of 3) 2.1 3-5 Troubleshooting Flow Chart for 40 W Transmitter (Sheet 2 of 3) Check PA Stages No or too low power when keyed DC Voltage at Q101 & Q102 base=0? Check Q102, Q101, R122, R165 No Check U510 Yes No DC Voltage at U103 Pin 10=8.
3-6 2.
Troubleshooting Flow Chart for Synthesizer 3.0 3-7 Troubleshooting Flow Chart for Synthesizer Start NO Correct Problem Check D200, D201, C2026, C2025, & C2027 3.3V at U200 pins 5, 20, 34 & 36 Visual check of the Board OK? NO Check 3V Regulator U503 YES YES YES 5V at pin 6 of D200 NO Is U200 Pin 47 at = 14.6VDC ? NO +5V at U200 Pin’s 13 & 30 ? NO YES Check R228 Check R201 Is U201 Pin 19 <40 mVDC in RX & >4.
3-8 TROUBLESHOOTING CHARTS 4.0 Troubleshooting Flow Chart for VCO RX VCO Low or no RF Signal at input to PA Low or no RF Signal at TP1 Visual check of board OK? NO Correct Problem NO Visual check of board OK? YES YES Make sure Synthesizer is working correctly and runner between U200 Pin 28 and U201 Pin 14 & 18 is OK NO 4.5V DC at U201 Pin 14 & 18 OK ? 4.5V DC at U201 Pin 14 & 18 OK ? NO YES YES 370mV DC at U201 Pin 19 OK? TX VCO Check runner between U200 Pin 2 and U201 Pin 19 NO NO 4.
Troubleshooting Flow Chart for DC Supply (1 of 2) 5.0 3-9 Troubleshooting Flow Chart for DC Supply (1 of 2) Since the failure of a critical voltage supply might cause the radio to automatically power down, supply voltages should first be probed with a multimeter. If all the board voltages are absent, then the voltage test point should be retested using a rising-edge-triggered oscilloscope. If the voltage is still absent, then another voltage should be tested using the oscilloscope.
3-10 5.1 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for DC Supply (2 of 2) D3_3V Check VDC on C5007 Go to Digital Section Replace U510 Yes Yes V=3.3V ? 9v
Chapter 4 UHF2 PCB/ SCHEMATICS/ PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards 1.1 UHF2 and Controller Circuits The UHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for both the UHF circuits and the Controller circuits. The PCB component layouts and the Parts Lists in this Chapter show both the Controller and UHF circuit components.
4-2 UHF2 PCB/ SCHEMATICS/ PARTS LISTS Notes
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 2.
UHF 2 (438-470 MHz) 25-40 W 8486577Z01, Top Side 1 R232 L214 SH202 C2073 R212 R211 L215 C2062 1 1 C2078 13 C2001 R225 R226 C2027 R458 R444 R441 R472 2 D401 C5071 1 R5019 C5087 R5075 5 U505 VR504 4 SH200 C5076 R5066 C5048 C5010 C5023 C5028 C5013 C5020 43 6 C5102 M2 R5064 R5033 R5009 R5084 1 R5024 C1123 9 C5005 R5018 C5034 C5025 C5026 16 C5044 R5074 C5029 U509 9 8 R5073 2 Q503 R5082 D500 2 C5001 R5085 C5038 L119 R601 C620 C622 R5087 C629 R602 2 Q500 C662 C62
C1000 R166 R169 C1103 R189 C1040 R138 C1104 C1065 R192 R106 2 C1067 C1130 L100 C1111 R105 C1109 Q103 R172 L108 C1068 R103 R185 C1035 R107 Q106 VR102 2 R108 D107 1 R121 C1079 D108 R163 R162 C1076 R152 R104 C1069 C1101 R119 D106 C1272 C1271 VR101 2 D102 2 C1110 R120 R143 1 C1102 C1077 R227 C2044 C1078 C339 CR301 2 C370 C352 R310 2 C349 R300 Q301 Q303 L301 R326 R330 C346 C355 C357 SH300 R331 SH301 C342 C344 C347 C332 L313 C335 C333 C330 C348 L
4-6 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics FILT_SW_B+ FILT_SW_B+ D3_3V D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS CH_ACT SQ_DET LSIO HSIO F1200 uP_CLK J3-31 J3-30 J3-29 J3-32 Option Board 17 16 15 2 1 6 3 7 18 19 10 8 5 13 NC ELP ONLY OPT_EN_OPBD OPT_DATA_R_OPBD 9V R604 0 NC ELP ONLY DNP NC ELP ONLY Keypad/Display DISPLAY_CS_CH SHIFT_R_CS COMM_DATA_SEL_CH KEYPAD_COL_CH KEYPAD_ROW_CH SCI_CH J3-17 J3-16 J3-15 J3-2 J3-1 J3-6 J3-3 J3-7 J3
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 4-7 TO SHEET 2 RX_EN TX_EN (SOURCE) (SOURCE) 3V D3_3V 5V 5V SPI_MOSI COMP_B+ COMP_B+ PA_CURRENT PWR_SET ASFIC_CS CH_ACT FILT_SW_B+ FILT_SW_B+ (SOURCE) LSIO 9V 9V 9V DC & AUDIO FILT_SW_B+ uP_CLK VS_AUDIO_SEL DET_VFWD 5V RESET VS_MIC TX_AUDIO_SEND_OPT_BRD TX_AUDIO_RETURN_OPT_BRD POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD DETECTOR_AUDIO_SEND_OPT_BRD UNMUTED_RX_AUDIO_SEND_OPT_BRD RX_AUDIO_RETURN_OPT_BRD 3V 5V 3V SPI_CLK SPI_MOSI SYNTH_CS SYNTH
4-8 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics (SOURCE) PA_FILT_B+ 2113740F57 C1053 180.p COMP_B+ R137 39.K FILT_SW_B+_PA R168 2.2K 0662057A57 C1072 120.p 2113740F53 U103 MC3303 4 8 R130 0. V_CTRL_PREDRIVER 0662057B47 DNP C1060 120.p 9 10 C1000 120.p FLT_9V R165 2.4K 0662057A58 C1112 39.p C1111 39.p C1110 39.p C1109 39.p C1106 39.p C1089 120.p C1107 120.p R122 4.7 0662057C19 C1115 39.p C1103 33n C1027 10uF C1040 1.n 2113741F25 VCNTR3 R138 36.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 4-9 R132 100K PA_CURRENT DNP R111 1K 0662057A49 R114 10K 0662057A73 R177 DNP 4 5113818A01 100 7 8 FILT_SW_B+_PA 120.p 5 C1055 120.p 1 2 R101 1.639m C110 120.p 4 6 C1056 R113 120.
4-10 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 5V 5V L217 390nH C2000 2.2uF C2034 120.p C2015 0.1uF R225 150. C2026 10n L200 390nH 3V K3 K2 K1 C2025 10n C2055 22p 3V C2023 10n R228 100. D200 C2024 10n C2005 2.2uF A3 A2 A1 C2016 0.1uF C2004 2.2uF R226 150. C2035 120.p C2027 10n C2198 1.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 4-11 V_SF L201 680nH R231 51. C2009 100n C2040 120.p C2038 120.p R235 18. C2008 0.1uF C2007 0.1uF C2042 120.p C2011 0.1uF C2041 120.p R220 510. L209 100.0n V_SF L208 100.0n C2010 100n C2039 120.p C2021 1.n R216 2.7K R215 3.6K 0662057A62 14 C2022 10n D203 L211 100.0n C2061 12pF C2069 1.2p L206 12.5n C2057 5.1p L203 150.n R232 47. C2056 5.1p C2030 3900pF C2076 100.
4-12 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics DNP FRONT-END SHIELD DNP DNP 9R R334 430. Q304 Q306 9V 1 Q300 Q301 C349 R326 120.p 2.7K L301 150.n C326 .022uF R330 820 2113743E07 0662057A47 RX C339 2.4pF IF300 1 C1121 3.3pF SH300 SHIELD DNP C300 51.p C341 4.7p L300 18.08n C340 2.4p C338 10.p C328 43.p C345 3.9p L309 18.08n C334 20.p CR301 C370 24.p C368 8.2p C323 1n R336 220. 0662057A25 5V RX_EN R331 100 4880142L01 D305 C351 0.1uF 2113743E20 R347 15 C346 4.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 4-13 1 U301 TC7W04F 7 R306 20.K C313 100n R315 12.K FL301 FLTR OUT 2 3 GND 1 IN U301 TC7W04F 2 D302 C312 100n R305 20.K D301 OUT 2 R324 3.3K R314 12.K 3 R327 2.4K R316 12.K FL302 FLTR 1 IN GND 6 BW_SEL C316 0.1uF Check if it is 3v or another value 3V 8 U301 PWR_GND VCC R307 20.K 3 GND1 U301 TC7W04F 5 3 R317 12.K FL304 CFWC455D 1 IN OUT 2 3V 4 GND2 4 GND C317 0.1uF C337 6.8p R322 4.7K 1 15 R329 1.
4-14 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics L120 57R01 1 IF502 C1097 39.p C1113 120.p C1098 C1114 120.p 39.p C1088 39.p 9V SOURCE FILT_B+ 4 VR500 28.0 10.u C5004 C5067 C5060 100.n 1n DNP R5038 33.K C5085 C5001 22.n C5083 120.p TP500 TEST_POINT M6 FILT_SW_B+ C5062 100.n 62.K BATT_SENSE C5074 120.p C5095 220.p C5096 C1087 220.p 39.p C1125 39.p DNP C5115 6.8p 150.K DNP DEMOD R5030 33.K DNP DNP R5099 100.K Q502 DNP 2 R5092 100.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 4-15 FLAT_TX_AUDIO_INPUT_ACCESS_CONN 9V R5046 24.K 4.7uF C5056 DNP C5055 4.7uF R5023 100.K R5063 R5044 8.2K 24.K DNP DNP C5054 100n C5081 120.p R5064 8.2K DNP DNP R5067 6.2K DNP C5057 4.7uF R5080 10. R5043 24.K R5009 0. U509 MC14053B 0662057A86 R5034 36K 12X0 13X1 2 Y0 1 Y1 5 Z0 3 Z1 R5032 47.K C5012 4.7u R5040 30.K RX_AUDIO_RETURN_OPT_BRD TX_AUDIO_SEND_OPT_BRD C5009 10.0u R5076 510. 3V R5052 10.K VAG=4.
4-16 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 1 SPI_MOSI SPI_CLK TP410 TEST_POINT R451 10.K R462 51. SCI_CH TP406 TEST_POINT R439 10.K R450 10.K LSIO 1 C410 TP404 100n TEST_POINT 1 SPI_MISO D400 D3_3V CH_ACT Q407 SQ_DET 10K ASFIC_CS 10K Q400 SYNTH_CS 47K HSIO 47K OPT_DATA_R_OPBD DISPLAY_CS_CH SHIFT_R_CS DNP D(0:7) R426 100.K R427 100.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 4-17 PROG_OUT-ALARM_4 FILT_SW_B+ R460 1.5K R401 2.7K Q403 10K 47K D3_3V Q401 R444 10.K DNP Q415 TP405 TEST_POINT DNP R459 47.K 1 DNP R431 10.K DNP D3_3V BOOT_EN_IN_CH ACCESS_PTT Q412 VR400 6.80 R457 3.3K R436 33.K 47K D3_3V 47K C490 1.u DNP R458 3.3K D401 D3_3V R421 220. SCI_CH TP408 TEST_POINT 1 R445 10.K HOOK_CH Q414 10K MIC_SENSE 47K D3_3V PROG_IN-P6_I 47K R434 33.K R470 10.K DNP MIC_PTT D3_3V R461 220.
4-18 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics U100 LM2904 5180932W01 IF701 INTEGRATOR R141 22.K 0662057A81 4 1 IF700 1 3 1 8 C1082 39pF DNP L101 1.u 2462587T30 2 C1071 120.p 2113740F53 C1046 120.p 2113740F53 DET_VFWD C1075 39.p 2113740F41 C1045 120.p 2113740F53 FILT_SW_B+ R140 18K 0662057A79 C1049 120.p 2113740F53 D101 R117 15K 0662057P02 R146 22.K 0662057A81 U100 LM2904 8 6 2462587T30 C1048 120.p 5 L102 1.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics 2.1 UHF2 PCB 8486577Z01 Parts List 25-40 W 4-19 Circuit Ref. Motorola Part No. C1026 2111078B08 Circuit Ref. Motorola Part No. CAP CHIP RF 6.2 .25NPO 100V C1049 2113740F53 Description Circuit Ref. Motorola Part No. CAP CHIP REEL CL1 +/-30 120 C1069 2113740F30 CAP CHIP REEL CL1+/-30 13 Description Description Circuit Ref. Motorola Part No.
4-20 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No. C1088 2113740F41 CAP CHIP REEL CL1 +/-30 39 C1108 2113740F22 C1089 2113740F53 CAP CHIP REEL CL1 +/-30 120 C1109 C1090 NOT PLACED GCAM DUMMY PART NUMBER C1091 NOT PLACED C1092 Circuit Ref. Motorola Part No. CAP CHIP REEL CL1 +/-30 6.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. C2000 2113743F18 C2001 4-21 Circuit Ref. Motorola Part No. CAP CHIP 2.2 UF 16V +8020% C2024 2113741F49 2311049J11 CAPACITOR TANT 10% 4.7UF C2025 C2002 2311049A72 CAP TANT CHIP 10.0UF 10% 10V C2003 2113743K15 C2004 2113743F18 C2005 C2006 2113743F18 2113743F18 Circuit Ref. Motorola Part No.
4-22 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. C304 2113743E20 CAP CHIP. 10 UF 10% C305 2113743E20 CAP CHIP. 10 UF 10% Description C306 2113743E20 CAP CHIP. 10 UF 10% C307 2113743E20 CAP CHIP. 10 UF 10% C308 2113743E20 CAP CHIP. 10 UF 10% C309 2113743E20 CAP CHIP. 10 UF 10% C310 2113743E20 CAP CHIP. 10 UF 10% C311 2113743E20 CAP CHIP. 10 UF 10% C312 2113743E20 CAP CHIP. 10 UF 10% C313 2113743E20 CAP CHIP.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. C5002 2311049A99 CAP TANT CHIP 47 UF 10V 20% C5003 2311049A99 CAP TANT CHIP 47 UF 10V 20% C5004 NOT PLACED GCAM DUMMY PART NUMBER Description 4-23 Circuit Ref. Motorola Part No. C5026 2113743K15 CHIP CAP, CER 0.1UF C5027 2113743K15 CHIP CAP, CER 0.1UF C5028 2113743K15 CHIP CAP, CER 0.1UF C5029 2113743K15 CHIP CAP, CER 0.1UF C5030 2113743K15 CHIP CAP, CER 0.1UF Description Circuit Ref.
4-24 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No. C5092 2113740F59 GCAM DUMMY PART NUMBER C618 2113740F41 C5094 2113743H14 CAP CHIP 10.0 UF 16V +8020% C619 C5120 NOT PLACED GCAM DUMMY PART NUMBER CAP CHIP REEL CL1 +/-30 220 C602 2113740F41 2113740F59 CAP CHIP REEL CL1 +/-30 220 C603 C5098 2113740F59 CAP CHIP REEL CL1 +/-30 220 C5099 2113740F59 Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. D500 4813833C02 D501 NOT PLACED D502 D511 D513 4813825A23 4813833C02 4813833C02 Description DIODE DUAL 70V ‘5B’ COMM CATH GCAM DUMMY PART NUMBER DIODE, DISCRETE SPECIALS VAR& DIODE DUAL 70V ‘5B’ COMM CATH DIODE DUAL 70V ‘5B’ COMM CATH FL300 9180022M11 XTAL FILTER 44.85MHZ FL301 9180468V06 SMD455KHZ 4 ELEMENT CER FLTR 4-25 Circuit Ref. Motorola Part No. L113 2460592A01 L114 Circuit Ref. Motorola Part No.
4-26 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. Q301 4813824A17 XSTR PNP40V .2A GENPB=100-300 Q302 4813824A10 TSTR NPN 40V .2A GEN PURP Description Q303 4802245J95 BJT, NPN TRANSISTOR Q304 4809939C04 TSTR DUAL PNP/NPN UMC3 Q305 4802197J95 RF TRANSISTOR PBR941 Q306 4813824A17 XSTR PNP40V .2A GENPB=100-300 Q400 Q401 4809940E02 4880141L03 TSTR DIG NPN DTC114YE QSTR PNP SOT23 LO PROFILE TAP Circuit Ref. Motorola Part No.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. R188 NOT PLACED GCAM DUMMY PART NUMBER R189 0662057A97 CHIP RES 100K OHMS 5% R190 0662057C35 CHIP RES 22 OHMS 5% R191 0662057C35 CHIP RES 22 OHMS 5% R192 0662057C35 CHIP RES 22 OHMS 5% R193 NOT PLACED GCAM DUMMY PART NUMBER R194 NOT PLACED GCAM DUMMY PART NUMBER R195 NOT PLACED GCAM DUMMY PART NUMBER Description 4-27 Circuit Ref. Motorola Part No. R214 0662057A65 R215 Circuit Ref. Motorola Part No.
4-28 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No.
UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. R603 NOT PLACED R604 NOT PLACED GCAM DUMMY PART NUMBER R610 0662057C59 CHIP RES 220 OHMS 5% R615 0662057A25 CHIP RES 100 OHMS 5% Circuit Ref. Motorola Part No. R5082 0662057A90 CHIP RES 51K OHMS 5% R5083 0662057B08 CHIP RES 270K OHMS 5% R5084 0662057B47 CHIP RES 0 OHMS +-.
4-30 UHF 25-40 W Band 2 PCB 8486577Z01 / Schematics Notes
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 3.
UHF2 (438-470 MHz) 25-40 W 8486577Z03, Top Side C2073 R212 R211 L215 C2062 1 13 C2078 C2001 C2026 R225 R226 C2027 R458 R459 R444 D401 R5031 C5062 R430 R5050 R441 R472 C5087 C5071 R5075 1 8 U505 5 VR504 4 R5019 C5076 R5066 C5048 C5010 C5014 C5023 C5028 C5013 C5020 43 6 C5102 C5103 C1123 9 C5005 C5025 R5009 R5084 R5018 R5064 R5063 1 R5024 2 D500 C5001 C5034 C5029 C5044 16 R5074 C5026 R5033 U509 9 8 C621 C628 C662 C629 R5104 C622 R5087 C620 R601 C630 C623 C
C1112 C1089 C1000 R150 L124 C1103 L115 C1104 C1065 R192 R106 C1081 C1068 R103 C1077 R157 C1109 Q103 C1067 R105 L100 C1111 C1050 R172 C1035 L108 R108 C1110 VR102 R185 R107 Q106 C1079 R162 R152 R121 R120 R119 C1069 C1102 R183 D102 D108 R104 R118 D105 C1101 C1271 D106 R160 R163 R190 R191 C1272 R161 C1080 R156 R143 R142 C1059 14 R145 C1130 C1078 6 T300 3 C345 C328 C341 C340 C368 C353 L310 C370 L300 4 U302 T301 6 SH300 CR301 C334 C300 L309 L306 C33
4-34 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics FILT_SW_B+ FILT_SW_B+ D3_3V D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS CH_ACT SQ_DET LSIO HSIO F1200 uP_CLK J3-31 J3-30 J3-29 J3-32 Option Board 17 16 15 2 1 6 3 7 18 19 10 8 5 13 NC ELP ONLY OPT_EN_OPBD OPT_DATA_R_OPBD 9V R604 0 NC ELP ONLY DNP NC ELP ONLY Keypad/Display DISPLAY_CS_CH SHIFT_R_CS COMM_DATA_SEL_CH KEYPAD_COL_CH KEYPAD_ROW_CH SCI_CH J3-17 J3-16 J3-15 J3-2 J3-1 J3-6 J3-3 J3-7 J
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-35 TO SHEET 2 RX_EN TX_EN (SOURCE) (SOURCE) 3V D3_3V 5V 3V D3_3V 5V SPI_MOSI COMP_B+ COMP_B+ PA_CURRENT PWR_SET ASFIC_CS CH_ACT FILT_SW_B+ FILT_SW_B+ (SOURCE) LSIO 9V 9V 9V DC & AUDIO FILT_SW_B+ uP_CLK VS_AUDIO_SEL DET_VFWD 5V RESET VS_MIC TX_AUDIO_SEND_OPT_BRD TX_AUDIO_RETURN_OPT_BRD POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD DETECTOR_AUDIO_SEND_OPT_BRD UNMUTED_RX_AUDIO_SEND_OPT_BRD RX_AUDIO_RETURN_OPT_BRD 3V 5V 3V SPI_CLK SPI_MOSI SYNT
4-36 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics (SOURCE) PA_FILT_B+ 2113740F57 C1053 180.p COMP_B+ R137 39.K FILT_SW_B+_PA R168 2.2K 0662057A57 C1072 120.p 2113740F53 U103 MC3303 4 8 R130 0. V_CTRL_PREDRIVER 0662057B47 DNP C1060 120.p 9 10 C1000 120.p FLT_9V R165 2.4K 0662057A58 C1112 39.p C1111 39.p C1110 39.p C1109 39.p C1106 39.p C1089 120.p C1107 120.p R122 4.7 0662057C19 C1115 39.p C1103 33n C1027 10uF C1040 1.n 2113741F25 VCNTR3 R138 36.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-37 R132 100K PA_CURRENT DNP R111 1K 0662057A49 R114 10K 0662057A73 R177 DNP 4 5113818A01 100 7 8 FILT_SW_B+_PA 120.p 5 C1055 120.p 1 R101 1.639m C110 120.p 4 6 C1056 R113 120.
4-38 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 5V 5V L217 390nH C2000 2.2uF C2034 120.p C2015 0.1uF R225 150. C2026 10n 3V L200 390nH 3V K3 K2 K1 C2025 10n C2055 22p C2023 10n R228 100. D200 C2024 10n C2005 2.2uF A3 A2 A1 C2016 0.1uF C2004 2.2uF R226 150. C2035 120.p C2027 10n C2198 1.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-39 V_SF L201 680nH R231 51. C2009 100n C2040 120.p C2038 120.p R235 18. C2008 0.1uF C2007 0.1uF C2042 120.p C2011 0.1uF C2041 120.p R220 510. L209 100.0n V_SF L208 100.0n C2010 100n C2039 120.p C2021 1.n R216 2.7K R215 3.6K 0662057A62 14 C2022 10n D203 L211 100.0n C2061 12pF C2069 1.2p L206 12.5n C2057 5.1p L203 150.n R232 47. C2056 5.1p C2030 3900pF C2076 100.
4-40 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics DNP FRONT-END SHIELD DNP DNP 9R R334 430. Q304 Q306 9V Q300 Q301 C349 R326 120.p 2.7K L301 150.n C326 .022uF R330 820 2113743E07 0662057A47 RX C339 2.4pF IF300 1 C1121 3.3pF SH300 SHIELD DNP C300 51.p C341 4.7p L300 18.08n C340 2.4p C338 10.p C328 43.p C345 3.9p L309 18.08n C334 20.p CR301 C370 24.p C368 8.2p R331 100 4880142L01 D305 C351 0.1uF 2113743E20 R347 15 C346 4.3p C342 4.7p C343 3.6p C347 3.6p C344 3.6p C348 3.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-41 C313 100n FLTR OUT 2 3 GND 1 IN U301 TC7W04F 2 D302 C312 100n R305 20.K D301 OUT 2 1 IN R324 3.3K R314 12.K 3 R327 2.4K R316 12.K FL302 FLTR GND 6 BW_SEL C316 0.1uF Check if it is 3v or another value 3V 8 U301 PWR_GND VCC R307 20.K 3 GND1 U301 TC7W04F 5 3 R317 12.K FL304 CFWC455D 1 IN OUT 2 3V 4 GND2 4 GND C317 0.1uF C337 6.8p R322 4.7K 1 15 R329 1.
4-42 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics L120 57R01 1 IF502 C1113 C1097 120.p 39.p C1098 C1114 120.p 39.p C1088 39.p 9V SOURCE FILT_B+ 4 VR500 28.0 10.u C5004 C5067 C5060 1n 100.n DNP R5038 33.K C5085 22.n C5001 C5083 120.p TP500 TEST_POINT M6 FILT_SW_B+ C1085 C1096 39.p 39.p 62.K BATT_SENSE C5074 120.p C5095 220.p C5096 C1087 C1034 C1122 C1123 C1124 220.p 39.p 39.p 39.p 39.p 39.p C1125 39.p C5005 100.u R5097 0. DNP C5115 6.8p C5063 100.n C5092 220.p R5000 0.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-43 FLAT_TX_AUDIO_INPUT_ACCESS_CONN R5046 24.K 4.7uF C5056 DNP C5055 4.7uF R5023 100.K R5063 R5044 8.2K 24.K DNP DNP C5054 100n C5081 120.p R5064 8.2K DNP DNP R5067 6.2K DNP C5057 4.7uF R5080 10. R5043 24.K R5009 0. U509 MC14053B 0662057A86 R5034 36K 12X0 13X1 2 Y0 1 Y1 5 Z0 3 Z1 R5032 47.K C5012 4.7u R5040 30.K RX_AUDIO_RETURN_OPT_BRD TX_AUDIO_SEND_OPT_BRD C5009 10.0u R5076 510. 3V R5052 10.K VAG=4.
4-44 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 1 SPI_MOSI SPI_CLK TP410 TEST_POINT R451 10.K R462 51. SCI_CH TP406 TEST_POINT R439 10.K R450 10.K LSIO 1 C410 TP404 100n TEST_POINT 1 SPI_MISO D400 D3_3V CH_ACT Q407 SQ_DET 10K ASFIC_CS 10K Q400 SYNTH_CS 47K HSIO 47K OPT_DATA_R_OPBD DISPLAY_CS_CH SHIFT_R_CS DNP DNP R426 100.K R427 100.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-45 PROG_OUT-ALARM_4 FILT_SW_B+ R460 1.5K R401 2.7K Q403 10K 47K D3_3V Q401 R444 10.K DNP Q415 TP405 TEST_POINT DNP R459 47.K 1 DNP R431 10.K DNP D3_3V BOOT_EN_IN_CH ACCESS_PTT Q412 VR400 6.80 R457 3.3K R436 33.K 47K D3_3V 47K C490 1.u DNP R458 3.3K D401 D3_3V R421 220. SCI_CH TP408 TEST_POINT 1 R445 10.K HOOK_CH Q414 10K MIC_SENSE 47K D3_3V PROG_IN-P6_I R434 33.K Q413 MIC_PTT D3_3V R461 220. MIC_PTT_CH C417 120.
4-46 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics U100 LM2904 5180932W01 IF701 INTEGRATOR R141 22.K 0662057A81 4 1 IF700 1 3 1 8 C1082 39pF DNP L101 1.u 2462587T30 2 C1071 120.p 2113740F53 C1046 120.p 2113740F53 DET_VFWD C1075 39.p 2113740F41 C1045 120.p 2113740F53 FILT_SW_B+ R140 18K 0662057A79 C1049 120.p 2113740F53 D101 R117 15K 0662057P02 R146 22.K 0662057A81 U100 LM2904 8 6 2462587T30 C1048 120.p 5 L102 1.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 3.
4-48 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No. C1087 2113740F41 CAP CHIP REEL CL1 +/-30 39 C1107 2113740F53 CAP CHIP REEL CL1 +/-30 120 C1128 2113740F41 C1088 2113740F41 CAP CHIP REEL CL1 +/-30 39 C1108 2113740F23 CAP CHIP REEL CL1 +/-30 6.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. C2000 2113743F18 C2001 4-49 Circuit Ref. Motorola Part No. CAP CHIP CL2 X7R REEL 10000 C2043 2113740L14 2113741F49 CAP CHIP CL2 X7R REEL 10000 C2044 C2026 2113741F49 CAP CHIP CL2 X7R REEL 10000 CHIP CAP, CER 0.1UF C2027 2113741F49 CAP CHIP 2.2 UF 16V +8020% C2028 CAP CHIP 2.2 UF 16V +8020% CAP CHIP 2.2 UF 16V +8020% Circuit Ref. Motorola Part No. CAP CHIP 2.
4-50 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. C304 2113743E20 C305 2113743E20 C306 2113743E20 Circuit Ref. Motorola Part No. CAP CHIP. 10 UF 10% C332 2113740L09 CAP CHIP. 10 UF 10% C333 2113740L13 Description CAP CHIP. 10 UF 10% C307 2113743E20 CAP CHIP. 10 UF 10% C308 2113743E20 CAP CHIP. 10 UF 10% C309 2113743E20 CAP CHIP. 10 UF 10% C310 2113743E20 CAP CHIP. 10 UF 10% C311 2113743E20 CAP CHIP.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. C5004 NOT PLACED C5005 2360567A03 CAP TANTALUM C5006 2311049A57 CAP TANT CHIP A/P 10UF 10% 16V C5007 C5008 C5009 C5010 C5011 2311049A99 2311049A57 2311049A57 2311049A57 2311049A57 Motorola Part No. C5030 Circuit Ref. Motorola Part No. CAP CER CHIP 4.7UF 6.
4-52 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. CAP CHIP REEL CL1 +/-30 220 C5120 NOT PLACED 2113740F59 CAP CHIP REEL CL1 +/-30 220 C602 C5097 2113740F59 CAP CHIP REEL CL1 +/-30 220 C5098 2113740F59 C5099 2113740F59 Circuit Ref. Motorola Part No. C5095 2113740F59 C5096 Circuit Ref. Motorola Part No.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-53 Circuit Ref. Motorola Part No. COIL AW 2 TURN 17 NH L216 2462587N44 7686135U02 FLTR,EMI L217 2462587Q42 L118 7686135U02 FLTR,EMI L218 NOT PLACED L119 7686135U02 FLTR,EMI L300 2460591C35 COIL AIR WOUND INDUC 18.08 L301 2462587N55 CHIP IND 150 NH 5% L302 2462587N55 CHIP IND 150 NH 5% L303 2462587X69 IND CHIP LO-PRO 1200 NH 5% Circuit Ref. Motorola Part No. L115 2460592A01 L117 Circuit Ref. Motorola Part No.
4-54 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. TSTR NPN 40V .2A GEN PURP Q505 4813824A10 4802245J95 BJT, NPN TRANSISTOR Q506 4813824A10 4809939C04 TSTR DUAL PNP/NPN UMC3 R101 1705603W01 RES SMT SHUNT Circuit Ref. Motorola Part No. Q302 4813824A10 Q303 Q304 Description Circuit Ref. Motorola Part No. TSTR NPN 40V .2A GEN PURP R130 0662057B47 CHIP RES 0 OHMS +-.050 OHMS TSTR NPN 40V .
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics 4-55 Circuit Ref. Motorola Part No. CHIP RES 100K OHMS 5% R216 0662057A59 0662057C35 CHIP RES 22 OHMS 5% R217 R191 0662057C35 CHIP RES 22 OHMS 5% R192 0662057C35 CHIP RES 22 OHMS 5% R193 NOT PLACED Circuit Ref. Motorola Part No.
4-56 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. CHIP RES 33K OHM 5% R471 0662057A01 0662057A85 CHIP RES 33K OHM 5% R472 NOT PLACED R438 0662057A73 CHIP RES 10K OHMS 5% R439 0662057A73 CHIP RES 10K OHMS 5% R440 0662057A73 CHIP RES 10K OHMS 5% R441 0662057A73 CHIP RES 10K OHMS 5% Circuit Ref. Motorola Part No. R435 0662057A85 R436 R442 0662057A73 Description R473 R5000 NOT PLACED 0662057B47 Description Circuit Ref. Motorola Part No.
UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. R5085 NOT PLACED R5086 0662057A43 CHIP RES 560 OHMS 5% R5087 0662057A97 CHIP RES 100K OHMS 5% R5088 0662057B47 CHIP RES 0 OHMS +-.050 OHMS Description GCAM DUMMY PART NUMBER R5089 NOT PLACED GCAM DUMMY PART NUMBER R5092 NOT PLACED GCAM DUMMY PART NUMBER R5093 R5094 R5095 NOT PLACED NOT PLACED NOT PLACED GCAM DUMMY PART NUMBER GCAM DUMMY PART NUMBER 4-57 Circuit Ref. Motorola Part No.
4-58 UHF 25-40 W Band 2 PCB 8486577Z03 / Schematics Notes
M CM200/CM300/PM400 Radios UHF3 (465-495 MHz) 25-40 W Service Information Issue: November, 2007
ii Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form, the copyrighted computer program.
iii Table of Contents Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 PM400 Model Chart .............................................................................................1-1 2.0 Technical Specifications ......................................................................................1-2 Chapter 2 THEORY OF OPERATION 1.0 Introduction ..........................................................................................................2-1 2.0 UHF (465-495 MHz) Receiver .......
iv 9.0 Receive Audio Circuits....................................................................................... 2-19 9.1 Squelch Detect .......................................................................................... 2-19 9.2 Audio Processing and Digital Volume Control ........................................... 2-20 9.3 Audio Amplification Speaker (+) Speaker (-) ............................................. 2-20 9.4 Handset Audio ............................................................
v 3.0 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics .....................................4-31 UHF3 Interconnection between Main Board and Power Amplifier Compartment .....................................................................................4-31 UHF3 (465-495 MHz) 25-40 W 8486577Z03, Top Side .................................4-32 UHF3 (465-495 MHz) 25-40 W 8486577Z03, Bottom Side .............................4-33 UHF3 (465-495 MHz) 25-40 W Main Circuit (Sht 1 of 2) ..............................
vi Notes
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS 1.0 PM400 Model Chart UHF3, 25-40 W, 465-495 MHz Model AAM50SPF9AA3AN Description PM400 465-495 MHz, 25-40 W, 64 CH Item Description X PMUE2092_ PM400 Super Tanapa UHF3, 25-40 W, 64 CH X PMUE2038_ PM400 Tanapa UHF3, 25-40 W, 64 CH X FLN3108_AN Control Head X PMUE2038_S PM400 UHF3 Service Board X 6881096C32 PM400 User Guide (bilingual) X HKLN4219 PM400 User Guide CDROM (bilingual) x = Indicates one of each is required.
1-2 2.0 MODEL CHART AND TECHNICAL SPECIFICATIONS Technical Specifications Data is specified for +25°C unless otherwise stated. General Specification Frequency Range: Frequency Stability (-30°C to +60°C, 25°C Ref.) UHF3 465-495 MHz ±2.5 PPM Channel Capacity: PM400 - 64 Channel Spacing: 12.5/25 kHz Power Supply: Dimensions (L x W x H) Weight FCC Description Operating Temperature 13.6 Vdc (10.88 Vdc - 16.32 Vdc) negative Vehicle ground 4.65” X 6.67” X 1.73” (118mm X 169.5mm X 44mm) 2.25 lbs (1.
Technical Specifications 1-3 Transmitter Specification UHF2 Power Output 25-40W Conducted/Radiated Emissions: -26 dBm Audio Response: (from 6 dB/ oct. Pre-Emphasis, 300 to 3000Hz) TIA603 and CEPT Tx Audio Distortion < 3% Modulation Limiting: ±2.5 kHz @ 12.5 kHz ±4.0 kHz @ 20 kHz ±5.0 kHz @ 25 kHz FM Hum and Noise: -35 dB@12.5 kHz -40 dB@25 kHz Receiver Specification Sensitivity (12 dB SINAD): UHF2 0.35 μV @ 12.5 kHz 0.3 μV @ 25 kHz Intermodulation: 60 dB@12.
1-4 MODEL CHART AND TECHNICAL SPECIFICATIONS Notes
Chapter 2 THEORY OF OPERATION 1.0 Introduction This Chapter provides a detailed theory of operation for the UHF circuits in the radio. Details of the theory of operation and trouble shooting for the the associated Controller circuits are included in this Section of the manual. 2.0 UHF (465-495 MHz) Receiver 2.1 Receiver Front-End The received signal is applied to the radio’s antenna input connector and routed through the harmonic filter and antenna switch.
2-2 THEORY OF OPERATION 2.2 Receiver Back End The IF signal from the crystal filter enters the IF amplifier which provides 20 dB of gain and feeds the IF IC at pin 1. The first IF signal at 44.85 MHz mixes with the second local oscillator (LO) at 44.395 MHz to produce the second IF at 455 kHz. The second LO uses the external crystal Y301. The second IF signal is amplified and filtered by two external ceramic filters (FL303/FL302 for 12.5 kHz channel spacing and FL304/FL301 for 25 kHz channel spacing).
UHF Transmitter Power Amplifier (465-495 MHz) 2-3 power of the PA.Op-amp U103-3 monitors the drain current of U101 via resistor R122 and adjusts the bias voltage of U101. In receive mode, the DC voltage from RX_EN line turns on Q101, which in turn switches off the biasing voltage to U101. 3.2 Power Controlled Driver Stage The next stage is an LDMOS device (Q105) which provides a gain of 12 dB. This device requires a positive gate bias and a quiescent current flow for proper operation.
2-4 3.6 THEORY OF OPERATION Harmonic Filter Inductors L111, L113 and L128 along with capacitors C1011, C1023, C1020, C1016, C1025 and C1026 form a low-pass filter to attenuate harmonic energy coming from the transmitter. Resistor R150 along with L130 drains any electrostatic charges that might otherwise build up on the antenna. The harmonic filter also prevents high level RF signals above the receiver passband from reaching the receiver circuits to improve spurious response rejection. 3.
UHF (465-495 MHz) Frequency Synthesizer 2-5 parameters (four characterize the inverse Bechmann voltage curve and one for frequency accuracy of the reference oscillator at 25 degrees C). This algorithm is implemented by the LVFRAC-N (U200) at the power up of the radio. TCXO Y200, along with its corresponding circuitry R204, R205, R210, and C2053, are not placed as the temperature compensated crystal proved to be reliable. 4.
2-6 THEORY OF OPERATION 4.3 Voltage Controlled Oscillator (VCO) The Voltage Controlled Oscillator (VCO) consists of the VCO/Buffer IC (VCOBIC, U201), the TX and RX tank circuits, the external RX buffer stages, and the modulation circuitry.
UHF (465-495 MHz) Frequency Synthesizer 4.4 2-7 Synthesizer Operation The synthesizer consists of a low voltage FRAC-N IC (LVFRAC-N), reference oscillator, charge pump circuits, loop filter circuit, and DC supply. The output signal (PRESC_OUT) of the VCOBIC (U201, pin 12) is fed to the PREIN, pin 32 of U200 via a low pass filter which attenuates harmonics and provides a correct input level to the LVFRAC-N in order to close the synthesizer loop.
2-8 5.0 THEORY OF OPERATION Controller Theory of Operation This section provides a detailed theory of operation for the radio and its components. The main radio is a single-board design, consisting of the transmitter, receiver, and controller circuits. A control head is connected by an extension cable. The control head contains LED indicators, a microphone connector, buttons, and speaker.
Controller Theory of Operation 2-9 The DC voltage applied to connector P2 supplies power directly to the following circuitry: • Electronic on/off control • RF power amplifier • 12 volts P-cH FET -U514 • 9.3 volt regulator • Audio PA Ignition Auto On/Off Switch Control B+ Control Head RF_PA, 8.
2-10 THEORY OF OPERATION Voltage regulator U503 provides 5 V for the RF circuits. Input and output capacitors are used to reduce the high frequency noise and provide proper operation during battery transients. 5.2 Protection Devices Diode VR500 acts as protection against ESD, wrong polarity of the supply voltage, and load dump. VR692 - VR699 are for ESD protection. 5.3 Automatic On/Off The radio can be switched ON in any one of the following three ways: 5.3.1 • On/Off switch.
Controller Theory of Operation 2-11 While the radio is switched on, the µP monitors the voltage at the emergency input on the accessory connector via U403-pin 62. Three different conditions are distinguished: no emergency kit is connected, emergency kit connected (unpressed), and emergency press. If no emergency switch is connected or the connection to the emergency switch is broken, the resistive divider R5030 / R5049 will set the voltage to about 3.
2-12 5.5 THEORY OF OPERATION Serial Peripheral Interface (SPI) The µP communicates to many of the IC’s through its SPI port. This port consists of SPI TRANSMIT DATA (MOSI) (U403-pin100), SPI RECEIVE DATA (MISO) (U403-pin 99), SPI CLK (U0403-pin1) and chip select lines going to the various IC’s, connected on the SPI PORT (BUS). This BUS is a synchronous bus, in that the timing clock signal CLK is sent while SPI data (SPI TRANSMIT DATA or SPI RECEIVE DATA) is sent.
Controller Theory of Operation 5.8 2-13 Normal Microprocessor Operation For this radio, the µP is configured to operate in one of two modes, expanded and bootstrap. In expanded mode the µP uses external memory devices to operate, whereas in bootstrap operation the µP uses only its internal memory. In normal operation of the radio the µP is operating in expanded mode as described below.
2-14 5.9 THEORY OF OPERATION Static Random Access Memory (SRAM) The SRAM (U402) contains temporary radio calculations or parameters that can change very frequently, and which are generated and stored by the software during its normal operation. The information is lost when the radio is turned off. The device allows an unlimited number of write cycles. SRAM accesses are indicated by the CS signal U402 (which comes from U403-CSGP2) going low.
Transmit Audio Circuits 7.0 2-15 Transmit Audio Circuits J2 24kOhms U509 15 MIC 46 35 P1 48 2 FLAT TX AUDIO MIC INT GCB3 MIC EXT U509 5 36 TX RTN MUX CONTROL HEAD CONNECTOR EXT MIC 44 TX SND 42 MUX AUX TX ACCESSORY CONNECTOR FILTERS AND PREEMPHASIS MIC ASFIC_CMP IN U504 LIMITER HS SUMMER SPLATTER FILTER LS SUMMER 38 GCB5 FLAT TX AUDIO MUTE VCO ATN ATTENUATOR MOD IN 40 TO RF SECTION (SYNTHESIZER) Figure 2-7 Transmit Audio Paths 7.
2-16 7.1.2 THEORY OF OPERATION Standard Microphone Hook Pin is shorted to the hook mic inside the standard Mic, If the mic is out off hook, 3.3 V is routed to R429 via R458, D401, and it create 0.7 V on MIC_SENSE (u.P U403-67) by Voltage Divider R429/R430. U403 senses this voltage and sends command to ASFIC_CMP U504 to get GCB3 =‘1’.
Transmit Signalling Circuits 8.
2-18 8.2 THEORY OF OPERATION High Speed Data High speed data refers to the 3600 baud data waveforms, known as Inbound Signaling Words (ISWs) used in a trunking system for high speed communication between the central controller and the radio. To generate an ISW, the µP first programs the ASFIC CMP (U504) to the proper filter and gain settings. It then begins strobing U504-pin 19 (HSIO) with a pulse when the data is supposed to change states.
Receive Audio Circuits 9.0 2-19 Receive Audio Circuits ACCESSORY CONNECTOR 11 1 AUDIO PA U502 9 4 SPKR + 16 SPKR - 1 EXTERNAL SPEAKER 6 INT SPKR+ INT SPKRCONTROL HEAD CONNECTOR 19 MUTE U509 FLT RX AUDIO P1 INTERNAL SPEAKER 20 J2 18 HANDSET AUDIO U505 37 39 10 GCB4 U IO 43 AUX RX 14 41 URX OUT AUDIO GCB1 VOLUME ATTEN.
2-20 9.2 THEORY OF OPERATION Audio Processing and Digital Volume Control The receiver audio signal (DISC AUDIO) enters the controller section from the IF IC where it is.DC coupled to ASFIC CMP via the DISC input U504-pin 2.
Receive Signalling Circuits 9.4 2-21 Handset Audio Certain handheld accessories have a speaker within them which require a different voltage level than that provided by U502. For these devices HANDSET AUDIO is available at control head connector J2 pin18. The received audio from the output of the ASFIC CMP’s digital volume attenuator is routed to U505 pin 2 where it is amplified. This signal is routed from the output of the op-amp U505 to J2-pin 18.
2-22 THEORY OF OPERATION The low speed limited data output (PL, DPL, and trunking LS) appears at U504-pin18, where it connects to the µP U403-pin 80. The low speed data is read by the µP at twice the frequency of the sampling waveform; a latch configuration in the ASFIC CMP stores one bit every clock cycle. The external capacitors C5028, and C5026 set the low frequency pole for a zero crossings detector in the limiters for PL and HS data.
Chapter 3 TROUBLESHOOTING CHARTS This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory of operation sections prior to troubleshooting a radio. Most troubleshooting charts end up by pointing to an IC to replace.
3-2 1.
Troubleshooting Flow Chart for Receiver RF (Sheet 1 of 2) 1.
3-4 2.0 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for 40 W Transmitter (Sheet 1 of 3) START No or too low power when keyed Check components between Q100 and RF output, Antenna Switch D104, D103, VR102 and Q106 >4A Current increase when keyed? >500mA & <4A <500mA Check PA Stages Yes Control Voltage at TP150 >4Vdc? No Check 9.3V Regulator U501 No Voltage U103 pin 5 = 4.
Troubleshooting Flow Chart for 40 W Transmitter (Sheet 1 of 3) 2.1 3-5 Troubleshooting Flow Chart for 40 W Transmitter (Sheet 2 of 3) Check PA Stages No or too low power when keyed DC Voltage at Q101 & Q102 base=0? Check Q102, Q101, R122, R165 No Check U510 Yes No DC Voltage at U103 Pin 10=8.
3-6 2.
Troubleshooting Flow Chart for Synthesizer 3.0 3-7 Troubleshooting Flow Chart for Synthesizer Start NO Correct Problem Check D200, D201, C2026, C2025, & C2027 3.3V at U200 pins 5, 20, 34 & 36 Visual check of the Board OK? NO Check 3V Regulator U503 YES YES YES 5V at pin 6 of D200 NO Is U200 Pin 47 at = 14.6VDC ? NO +5V at U200 Pin’s 13 & 30 ? NO YES Check R228 Check R201 Is U201 Pin 19 <40 mVDC in RX & >4.
3-8 TROUBLESHOOTING CHARTS 4.0 Troubleshooting Flow Chart for VCO RX VCO Low or no RF Signal at input to PA Low or no RF Signal at TP1 Visual check of board OK? NO Correct Problem NO Visual check of board OK? YES YES Make sure Synthesizer is working correctly and runner between U200 Pin 28 and U201 Pin 14 & 18 is OK NO 4.5V DC at U201 Pin 14 & 18 OK ? 4.5V DC at U201 Pin 14 & 18 OK ? NO YES YES 370mV DC at U201 Pin 19 OK? TX VCO Check runner between U200 Pin 2 and U201 Pin 19 NO NO 4.
Troubleshooting Flow Chart for DC Supply (1 of 2) 5.0 3-9 Troubleshooting Flow Chart for DC Supply (1 of 2) Since the failure of a critical voltage supply might cause the radio to automatically power down, supply voltages should first be probed with a multimeter. If all the board voltages are absent, then the voltage test point should be retested using a rising-edge-triggered oscilloscope. If the voltage is still absent, then another voltage should be tested using the oscilloscope.
3-10 5.1 TROUBLESHOOTING CHARTS Troubleshooting Flow Chart for DC Supply (2 of 2) D3_3V Check VDC on C5007 Go to Digital Section Replace U510 Yes Yes V=3.3V ? 9v
Chapter 4 UHF3 PCB/ SCHEMATICS/ PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards 1.1 UHF3 and Controller Circuits The UHF circuits are contained on the printed circuit board (PCB) which also contains the Controller circuits. This Chapter shows the schematics for both the UHF circuits and the Controller circuits. The PCB component layouts and the Parts Lists in this Chapter show both the Controller and UHF circuit components.
4-2 UHF3 PCB/ SCHEMATICS/ PARTS LISTS Notes
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 2.
UHF3 (465-495 MHz) 25-40 W 8486577Z01, Top Side 1 R232 L214 SH202 C2073 R212 R211 L215 C2062 1 C2078 13 C2001 R225 R226 C2027 R458 R459 R444 R441 R472 2 D401 R5050 R5075 C5071 1 R5019 C5087 8 5 U505 VR504 4 SH200 C5076 R5066 C5048 C5010 C5023 C5028 C5013 C5020 43 6 C5102 M2 R5064 R5063 R5033 R5009 R5084 9 R5018 C5005 1 R5024 C1123 R5040 R461 U502 C5034 C5025 C5026 16 C5044 R5074 C5029 U509 9 8 R5073 2 Q503 R5082 D500 2 C5001 R5085 C5038 D513 2 R5081 C509
C1000 R166 R169 C1103 R189 C1040 R138 C1104 C1065 R192 R106 2 C1067 C1130 L100 C1111 R105 C1109 Q103 R172 L108 C1068 R103 R185 C1035 R107 Q106 VR102 2 R108 D107 1 R121 C1079 D108 R163 R162 C1076 R152 R104 C1069 C1101 R119 D106 C1272 C1271 VR101 2 D102 2 C1110 R120 R143 1 C1102 C1077 R227 C2044 C1078 C339 CR301 2 C370 C352 R310 2 C349 R300 Q301 Q303 L301 R326 R330 C346 C355 C357 SH300 R331 SH301 C342 C344 C347 C332 L313 C335 C333 C330 C348 L
4-6 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics FILT_SW_B+ FILT_SW_B+ D3_3V D3_3V TX_EN SPI_CLK SPI_MOSI SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS CH_ACT SQ_DET LSIO HSIO F1200 uP_CLK J3-31 J3-30 J3-29 J3-32 Option Board 17 16 15 2 1 6 3 7 18 19 10 8 5 13 NC ELP ONLY OPT_EN_OPBD OPT_DATA_R_OPBD 9V R604 0 NC ELP ONLY DNP NC ELP ONLY Keypad/Display DISPLAY_CS_CH SHIFT_R_CS COMM_DATA_SEL_CH KEYPAD_COL_CH KEYPAD_ROW_CH SCI_CH J3-17 J3-16 J3-15 J3-2 J3-1 J3-6 J3-3 J3-7 J3
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 4-7 TO SHEET 2 RX_EN TX_EN (SOURCE) (SOURCE) 3V D3_3V 5V 3V D3_3V 5V SPI_MOSI COMP_B+ COMP_B+ PA_CURRENT PWR_SET ASFIC_CS CH_ACT FILT_SW_B+ FILT_SW_B+ (SOURCE) LSIO 9V 9V 9V DC & AUDIO FILT_SW_B+ uP_CLK VS_AUDIO_SEL DET_VFWD 5V RESET VS_MIC TX_AUDIO_SEND_OPT_BRD TX_AUDIO_RETURN_OPT_BRD POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD DETECTOR_AUDIO_SEND_OPT_BRD UNMUTED_RX_AUDIO_SEND_OPT_BRD RX_AUDIO_RETURN_OPT_BRD 3V 5V 3V SPI_CLK SPI_MOSI SYNTH
4-8 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics (SOURCE) PA_FILT_B+ 2113740F57 C1053 180.p COMP_B+ R137 39.K FILT_SW_B+_PA R168 2.2K 0662057A57 C1072 120.p 2113740F53 U103 MC3303 4 8 R130 0. V_CTRL_PREDRIVER 0662057B47 DNP C1060 120.p 9 10 C1000 120.p FLT_9V R165 2.4K 0662057A58 C1112 39.p C1111 39.p C1110 39.p C1109 39.p C1106 39.p C1089 120.p C1107 120.p R122 4.7 0662057C19 C1115 39.p C1103 33n C1027 10uF C1040 1.n 2113741F25 VCNTR3 R138 36.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 4-9 R132 100K PA_CURRENT DNP R111 1K 0662057A49 R114 10K 0662057A73 R177 DNP 4 5113818A01 100 7 8 FILT_SW_B+_PA 120.p 5 C1055 120.p 1 R101 1.639m C110 120.p 4 6 C1056 R113 120.
4-10 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 5V 5V L217 390nH C2000 2.2uF C2034 120.p C2015 0.1uF R225 150. C2026 10n 3V L200 390nH 3V K3 K2 K1 C2025 10n C2055 22p C2023 10n R228 100. D200 C2024 10n C2005 2.2uF A3 A2 A1 C2016 0.1uF C2004 2.2uF R226 150. C2035 120.p C2027 10n C2198 1.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 4-11 V_SF L201 680nH R231 51. C2009 100n C2040 120.p C2038 120.p R235 18. C2008 0.1uF C2007 0.1uF C2042 120.p C2011 0.1uF C2041 120.p R220 510. L209 100.0n V_SF L208 100.0n C2010 100n C2039 120.p C2021 1.n R216 2.7K R215 3.6K 0662057A62 14 C2022 10n D203 L211 100.0n C2061 12pF C2069 1.2p L206 12.5n C2057 5.1p L203 150.n R232 47. C2056 5.1p C2030 3900pF C2076 100.
4-12 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics DNP FRONT-END SHIELD DNP DNP 9R R334 430. Q304 Q306 9V 1 Q301 C349 R326 120.p 2.7K L301 150.n C326 .022uF R330 820 2113743E07 0662057A47 RX C339 2.4pF IF300 1 C1121 3.3pF SH300 SHIELD DNP C300 51.p C341 4.7p L300 18.08n C340 2.4p C338 10.p C328 43.p C345 3.9p L309 18.08n C334 20.p CR301 C370 24.p C368 8.2p C323 1n R336 220. Q300 0662057A25 5V RX_EN R331 100 4880142L01 D305 C351 0.1uF 2113743E20 R347 15 C346 4.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 4-13 C313 100n FLTR OUT 2 3 GND 1 IN U301 TC7W04F 2 D302 C312 100n R305 20.K D301 OUT 2 1 IN R324 3.3K R314 12.K 3 R327 2.4K R316 12.K FL302 FLTR GND 6 BW_SEL C316 0.1uF Check if it is 3v or another value 3V 8 U301 PWR_GND VCC R307 20.K 3 GND1 U301 TC7W04F 5 3 R317 12.K FL304 CFWC455D 1 IN OUT 2 3V 4 GND2 4 GND C317 0.1uF C337 6.8p R322 4.7K 1 15 R329 1.
4-14 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics L120 57R01 1 IF502 C1113 C1097 120.p 39.p C1098 C1114 120.p 39.p C1088 39.p 9V SOURCE FILT_B+ 4 VR500 28.0 10.u C5004 C5067 C5060 1n 100.n DNP R5038 33.K C5085 22.n C5001 C5083 120.p TP500 TEST_POINT M6 FILT_SW_B+ C1085 C1096 39.p 39.p 62.K BATT_SENSE C5074 120.p C5095 220.p C5096 C1087 C1034 C1122 C1123 C1124 220.p 39.p 39.p 39.p 39.p 39.p C1125 39.p C5005 100.u R5097 0. DNP C5115 6.8p C5063 100.n C5092 220.p R5000 0.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 4-15 FLAT_TX_AUDIO_INPUT_ACCESS_CONN R5046 24.K 4.7uF C5056 DNP C5055 4.7uF R5023 100.K R5063 R5044 8.2K 24.K DNP DNP C5054 100n C5081 120.p R5064 8.2K DNP DNP R5067 6.2K DNP C5057 4.7uF R5080 10. R5043 24.K R5009 0. U509 MC14053B 0662057A86 R5034 36K 12X0 13X1 2 Y0 1 Y1 5 Z0 3 Z1 R5032 47.K C5012 4.7u R5040 30.K RX_AUDIO_RETURN_OPT_BRD TX_AUDIO_SEND_OPT_BRD C5009 10.0u R5076 510. 3V R5052 10.K VAG=4.
4-16 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 1 SPI_MOSI SPI_CLK TP410 TEST_POINT R451 10.K R462 51. SCI_CH TP406 TEST_POINT R439 10.K R450 10.K LSIO 1 C410 TP404 100n TEST_POINT 1 SPI_MISO D400 D3_3V CH_ACT Q407 SQ_DET 10K ASFIC_CS 10K Q400 SYNTH_CS 47K HSIO 47K OPT_DATA_R_OPBD DISPLAY_CS_CH SHIFT_R_CS DNP DNP R426 100.K R427 100.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 4-17 PROG_OUT-ALARM_4 FILT_SW_B+ R460 1.5K R401 2.7K Q403 10K 47K D3_3V Q401 R444 10.K DNP Q415 TP405 TEST_POINT DNP R459 47.K 1 DNP R431 10.K DNP D3_3V BOOT_EN_IN_CH ACCESS_PTT Q412 VR400 6.80 R457 3.3K R436 33.K 47K D3_3V 47K C490 1.u DNP R458 3.3K D401 D3_3V R421 220. SCI_CH TP408 TEST_POINT 1 R445 10.K HOOK_CH Q414 10K MIC_SENSE 47K D3_3V PROG_IN-P6_I R434 33.K Q413 MIC_PTT D3_3V R461 220. MIC_PTT_CH C417 120.
4-18 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics U100 LM2904 5180932W01 IF701 INTEGRATOR R141 22.K 0662057A81 4 IF700 1 3 1 1 8 C1082 39pF DNP L101 1.u 2462587T30 2 C1071 120.p 2113740F53 C1046 120.p 2113740F53 DET_VFWD C1075 39.p 2113740F41 C1045 120.p 2113740F53 FILT_SW_B+ R140 18K 0662057A79 C1049 120.p 2113740F53 D101 R117 15K 0662057P02 R146 22.K 0662057A81 U100 LM2904 8 6 2462587T30 C1048 120.p 5 L102 1.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics 2.1 UHF3 PCB 8486577Z01 Parts List 25-40 W Circuit Ref. Motorola Part No. Description C1027 2389289U01 C1028 Circuit Ref. Motorola Part No.
4-20 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. CAP CHIP REEL CL1 +/-30 39 C1263 2113741F25 CAP CHIP CL2 X7R REEL 1000 NOT PLACED GCAM DUMMY PART NUMBER C1264 2113743K15 CHIP CAP, CER 0.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. C2002 2311049A72 C2003 C2004 C2005 C2006 4-21 Circuit Ref. Motorola Part No. CAP TANT CHIP 10.0UF 10% 10V C2026 2113741F49 2113743K15 CHIP CAP, CER 0.1UF C2027 2113743F18 CAP CHIP 2.2 UF 16V +8020% 2113743F18 2113743F18 Circuit Ref. Motorola Part No. CAP CHIP CL2 X7R REEL 10000 C2045 2113740F53 2113741F49 CAP CHIP CL2 X7R REEL 10000 C2046 C2028 2113741F33 CAP CHIP 2.
4-22 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. C307 2113743E20 CAP CHIP. 10 UF 10% C308 2113743E20 CAP CHIP. 10 UF 10% C309 2113743E20 CAP CHIP. 10 UF 10% C310 2113743E20 CAP CHIP. 10 UF 10% C311 2113743E20 CAP CHIP. 10 UF 10% C312 2113743E20 CAP CHIP. 10 UF 10% C313 2113743E20 CAP CHIP. 10 UF 10% C314 2113743E20 CAP CHIP. 10 UF 10% C315 2113743E20 C316 C317 Description Circuit Ref. Motorola Part No. C333 2113740L18 C334 Circuit Ref.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. C5003 2311049A99 CAP TANT CHIP 47 UF 10V 20% C5004 NOT PLACED GCAM DUMMY PART NUMBER C5005 2360567A03 C5006 C5007 C5008 C5009 C5010 C5011 2311049A57 2311049A99 2311049A57 2311049A57 2311049A57 2311049A57 Motorola Part No. C5028 Circuit Ref. Motorola Part No. CAP CHIP. 10 UF 10% (not used in GM3188) C5074 2113740F53 CAP CHIP REEL CL1 +/-30 120 2113928C04 CAP CER CHIP 4.7UF 6.
4-24 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. CAP CHIP REEL CL1 +/-30 220 C5119 2113743H14 2113740F59 CAP CHIP REEL CL1 +/-30 220 C5120 C5096 2113740F59 CAP CHIP REEL CL1 +/-30 220 C5097 2113740F59 C5098 C5099 Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No. C5094 2113740F59 CAP CHIP 10.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. GCAM DUMMY PART NUMBER L114 2485873L01 ENCAPSULATED AIR WOUND COIL 4813825A23 DIODE, DISCRETE SPECIALS VAR&P L115 2460592A01 COIL AW 2 TURN 17 NH L117 7686135U02 FLTR,EMI 4813833C02 DIODE DUAL 70V ‘5B’ COMM CATH L118 7686135U02 FLTR,EMI Circuit Ref. Motorola Part No. D501 NOT PLACED D502 D511 D513 4-25 4813833C02 Description Description Circuit Ref. Motorola Part No. L214 2413926H20 IND CHIP 47.
4-26 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. Q301 4813824A17 XSTR PNP40V .2A GENPB=100-300 Q302 4813824A10 TSTR NPN 40V .2A GEN PURP Description Q303 4802245J95 BJT, NPN TRANSISTOR Q304 4809939C04 TSTR DUAL PNP/NPN UMC3 Q305 4802197J95 RF TRANSISTOR PBR941 Q306 4813824A17 XSTR PNP40V .2A GENPB=100-300 Q400 Q401 4809940E02 4880141L03 TSTR DIG NPN DTC114YE QSTR PNP SOT23 LO PROFILE TAPE Circuit Ref. Motorola Part No.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. CHIP RES 100K OHMS 5% R216 0662057A59 0662057C35 CHIP RES 22 OHMS 5% R217 0662057C35 CHIP RES 22 OHMS 5% R218 Circuit Ref. Motorola Part No. R189 0662057A97 R190 R191 R192 R193 R194 R195 0662057C35 NOT PLACED NOT PLACED NOT PLACED Description CHIP RES 22 OHMS 5% GCAM DUMMY PART NUMBER Motorola Part No.
4-28 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No.
UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Circuit Ref. Motorola Part No. R5083 0662057B08 R5084 0662057B47 R5085 NOT PLACED Circuit Ref. Motorola Part No. CHIP RES 270K OHMS 5% R604 NOT PLACED CHIP RES 0 OHMS +-.
4-30 UHF 25-40 W Band 3 PCB 8486577Z01 / Schematics Notes
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 3.
UHF3 (465-495 MHz) 25-40 W 8486577Z03, Top Side C2073 R212 R211 L215 C2062 1 13 C2078 C2001 C2026 R225 R226 C2027 R458 R459 R444 D401 R5031 C5062 R430 R5050 R441 R472 C5087 C5071 R5075 1 8 U505 5 VR504 4 R5019 C5076 R5066 C5048 C5010 C5014 C5023 C5028 C5013 C5020 43 6 C5102 C5103 C1123 9 C5005 C5025 R5009 R5084 R5018 R5064 R5063 1 R5024 2 D500 C5001 C5034 C5029 C5044 16 R5074 C5026 R5033 U509 9 8 C621 C628 C662 C629 R5104 C622 R5087 C620 R601 C630 C623 C
C1112 C1089 C1000 R150 L124 C1103 L115 C1104 C1065 R192 R106 C1081 C1068 R103 C1077 R157 C1109 Q103 C1067 R105 L100 C1111 C1050 R172 C1035 L108 R108 C1110 VR102 R185 R107 Q106 C1079 R162 R152 R121 R120 R119 C1069 C1102 R183 D102 D108 R104 R118 D105 C1101 C1271 D106 R160 R163 R190 R191 C1272 R161 C1080 R156 R143 R142 C1059 14 R145 C1130 C1078 6 T300 3 C345 C328 C341 C340 C368 C353 L310 C370 L300 4 U302 T301 6 SH300 CR301 C334 C300 L309 L306 C33
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics FILT_SW_B+ D3_3V FILT_SW_B+ D3_3V TO SHEET 1 4-34 TX_EN SPI_CLK SPI_MOSI SPI_MISO RX_EN LOC_DIST RSSI SYNTH_CS SYNTH_LOCK ASFIC_CS CH_ACT SQ_DET LSIO HSIO F1200 uP_CLK J3-31 J3-30 J3-29 J3-32 VS_AUDIO_SEL Option Board NC ELP ONLY OPT_EN_OPBD OPT_DATA_R_OPBD 9V R604 0 NC ELP ONLY DNP NC ELP ONLY 1 6 3 9 8 17 5 10 DISPLAY_CS_CH SHIFT_R_CS COMM_DATA_SEL_CH KEYPAD_COL_CH KEYPAD_ROW_CH SCI_CH Keypad/Display J3-17 J3-16 J3-15 J3-2 J3-1 J3-6 J3-
4-35 TO SHEET 2 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics RX_EN TX_EN (SOURCE) (SOURCE) 3V D3_3V 5V (SOURCE) D3_3V 5V COMP_B+ 3V COMP_B+ PA_CURRENT SPI_MOSI SPI_CLK PWR_SET ASFIC_CS CH_ACT FILT_SW_B+ PWR_SET (SOURCE) FILT_SW_B+ 9V (SOURCE) LSIO 9V HSIO uP_CLK PA_BIAS FILT_SW_B+ SQ_DET F1200 PA_CURRENT PA_BIAS 9V DC & AUDIO FILT_SW_B+ VREV_BUFFER_IN VREV_BUFFER_IN POWER CONTROL VS_AUDIO_SEL DET_VFWD INTEGRATOR INTEGRATOR RESET VS_MIC TX_AUDIO_SEND_OPT_BRD TX_AUDIO
4-36 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics (SOURCE) PA_FILT_B+ COMP_B+ R137 39.K FILT_SW_B+_PA R168 2.2K 0662057A57 C1072 120.p 2113740F53 V_CTRL_PREDRIVER R130 0. 0662057B47 U103 MC3303 8 DNP C1060 120.p 9 4 10 R165 2.4K 0662057A58 C1111 39.p C1112 39.p C1000 120.p FLT_9V Place inside of the PA compartment IF108 L100 57R01 C1053 180.p 2113740F57 C1110 39.p C1109 39.p C1106 39.p C1089 120.p C1107 120.p R122 4.7 0662057C19 R138 36.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 4-37 R132 100K DNP PA_CURRENT C1095 39pF R111 1K 0662057A49 5113818A01 LM2904 U102 4 R114 10K 0662057A73 5 2 6 R113 C1056 120.p 10K 0662057A73 R110 1K 0662057A49 C110 120.p R101 1.639m 1 C1055 120.p DNP R177 100 FINAL_CURRENT_SENSE 7 8 FILT_SW_B+_PA C1073 120.
4-38 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 5V 5V L217 390nH C2000 2.2uF C2015 0.1uF C2034 120.p R225 150. C2026 10n K3 K2 K1 C2025 10n C2055 22p 3V A3 A2 A1 R228 100. D200 3V C2016 0.1uF C2024 10n L200 390nH C2004 2.2uF R226 150. C2005 2.2uF C2023 10n C2035 120.p C2027 10n C2198 1.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 4-39 V_SF L201 680nH R231 51. C2038 120.p C2009 100n C2040 120.p C2008 0.1uF C2007 0.1uF C2041 120.p C2042 120.p R235 18. C2011 0.1uF L209 R220 100.0n 510. V_SF L208 100.0n C2010 100n L211 22nH C2069 4.3pF L206 8nH C2012 3900pF DNP C2030 3900pF TX_IADJ RX_IADJ SUPER_FLTR COLL_RFIN RX_BASE RX_EMITTER TX_BASE TX_EMITTER FLIP_IN TRB_IN R232 47. C2056 5.1p DNP R215 3.6K 0662057A62 1 2 3 4 5 6 16 15 20 19 C2057 5.1p L203 150.n C2076 100.
4-40 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics FRONT-END SHIELD 9R R334 430. Q304 Q306 9V 5V RX_EN 1 L301 150.n Q300 Q301 C349 120.p R326 2.7K R330 820 2113743E07 RX IF300 C339 2pF C341 3.9pF C340 3.6pF C345 2pF C328 47pF 0662057A47 C326 .022uF C370 10pF SH300 SHIELD L300 18.08n C338 18pF L309 18.08n C334 8.2pF CR301 C368 7.5pF C323 1n 4880142L01 D305 C351 0.1uF 2113743E20 C352 120pF C346 2pF C342 3.9pF C343 3pF C347 2.7pF C344 3.9pF C348 2pF C329 36.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 4-41 U301 TC7W04F 1 7 R306 20.K C313 100n R315 12.K FL301 FLTR OUT 2 3 GND 1 IN U301 TC7W04F 6 BW_SEL 2 D302 C312 100n R305 20.K D301 OUT 2 R314 12.K 3 GND R324 3.3K R327 2.4K R316 12.K FL302 FLTR 1 IN C316 0.1uF 3V 8 U301 PWR_GND VCC R307 20.K U301 TC7W04F GND1 5 3 3 R317 12.K FL304 CFWC455D 1 IN OUT2 3V 4 GND2 4 GND C317 0.1uF R308 20.K SA616 R339 51. 3V 6 C337 6.8p R322 4.
4-42 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics L120 57R01 1 IF502 1 C1113 120.p C1097 39.p POWER SUPPLY SOURCE FILT_B+ 4 VR500 28.0 C5085 C5001 22.n 10.u TP500 TEST_POINT FILT_SW_B+ M6 U514 C1128 39.p C1085 39.p C1096 39.p 1 R5081 6.34K 1% C1132 39.p VR504 3.3 C5062 100.n C5005 100.u C5015 100n C5074 120.p C5095 220.p C5096 220.p C1122 39.p C1125 39.p R5050 13.K D502 C5115 6.8p C5117 16.p DNP DNP C5063 100.n DNP EMERGENCY_ACCES_CONN FILT_B+ R5029 100.K R5020 150.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 4-43 C5056 4.7uF DNP POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD C5089 82.p C5090 82.p DNP R5024 100.K 9V R5046 24.K DNP C5101 1.n C5032 100n R5057 10.K R5067 6.2K DNP 3V R5043 24.K R5032 47.K C5012 4.7u R5040 30.K 12 X0 3 Z1 TXRTN GCB3 CLK168 VDDD VDDCP GNDD GNDDO F1200 SYN VDDSYN NC PLCAP2 R5052 10.K VAG = 4.5V VAG C5023 100n C5028 100n C5013 1u 2 R5033 47.K LSIO C5025 100n R5061 10.K R5060 10.K 8 4 1 16 DNP R5018 1.
4-44 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics SPI_MOSI R451 10.K 1 C410 100n SPI_CLK TP406 TEST_POINT TP410 TEST_POINT R450 10.K 1 TP404 TEST_POINT R462 51. SCI_CH R439 10.K LSIO 1 SPI_MISO D400 D3_3V CH_ACT 10K 10K ASFIC_CS Q400 SYNTH_CS SQ_DET Q407 47K HSIO 47K OPT_DATA_R_OPBD DISPLAY_CS_CH 1 R428 100.K D3_3V PLACE NEAR U402 A(0:18) A(17) R427 100.K A(18) R414 0. R415 0.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 4-45 FILT_SW_B+ Q403 10K PROG_OUT-ALARM_4 R401 2.7K R460 1.5K 47K Q401 D3_3V R444 10.K D3_3V TP405 TEST_POINT R459 47.K DNP R431 10.K DNP R436 33.K 1 DNP Q415 DNP ACCESS_PTT BOOT_EN_IN_CH R457 3.3K 47K Q412 6.80 VR400 D3_3V 47K C490 1.u DNP R458 3.3K D401 D3_3V R421 220. SCI_CH R445 10.K HOOK_CH R429 100.K 10K 1 TP408 TEST_POINT MIC_SENSE Q414 47K D3_3V R435 33.K R430 39.K C418 120.p R456 3.
4-46 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics U100 LM2904 5180932W01 IF701 INTEGRATOR R141 22.K 0662057A81 4 1 L101 1.u 2462587T30 IF700 DET_VFWD 1 3 1 8 C1082 39pF 2113740F41 DNP 2 C1071 120.p 2113740F53 C1075 39.p 2113740F41 C1045 120.p 2113740F53 C1046 120.p 2113740F53 FILT_SW_B+ R140 18K 0662057A79 C1049 120.p 2113740F53 D101 4805218N57 INTEGRATOR R164 10K 0662057A73 R144 22K 0662057A81 R146 22.K 0662057A81 2462587T30 C1048 120.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 3.
4-48 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No. Circuit Ref. Motorola Part No. C1087 2113740F41 CAP CHIP REEL CL1 +/-30 39 C1107 2113740F53 CAP CHIP REEL CL1 +/-30 120 C1128 2113740F41 C1088 2113740F41 CAP CHIP REEL CL1 +/-30 39 C1108 2113740F23 CAP CHIP REEL CL1 +/-30 6.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. C2000 2113743F18 C2001 4-49 Circuit Ref. Motorola Part No. CAP CHIP CL2 X7R REEL 10000 C2043 2113740L14 2113741F49 CAP CHIP CL2 X7R REEL 10000 C2044 C2026 2113741F49 CAP CHIP CL2 X7R REEL 10000 CHIP CAP, CER 0.1UF C2027 2113741F49 CAP CHIP 2.2 UF 16V +8020% C2028 CAP CHIP 2.2 UF 16V +8020% CAP CHIP 2.2 UF 16V +8020% Circuit Ref. Motorola Part No. CAP CHIP 2.
4-50 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. C304 2113743E20 C305 2113743E20 C306 2113743E20 Circuit Ref. Motorola Part No. CAP CHIP. 10 UF 10% C332 2113740L09 CAP CHIP. 10 UF 10% C333 2113740L13 Description CAP CHIP. 10 UF 10% C307 2113743E20 CAP CHIP. 10 UF 10% C308 2113743E20 CAP CHIP. 10 UF 10% C309 2113743E20 CAP CHIP. 10 UF 10% C310 2113743E20 CAP CHIP. 10 UF 10% C311 2113743E20 CAP CHIP.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. C5004 NOT PLACED C5005 2360567A03 CAP TANTALUM C5006 2311049A57 CAP TANT CHIP A/P 10UF 10% 16V C5007 C5008 C5009 C5010 C5011 2311049A99 2311049A57 2311049A57 2311049A57 2311049A57 Motorola Part No. C5030 Circuit Ref. Motorola Part No. CAP CER CHIP 4.7UF 6.
4-52 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. CAP CHIP REEL CL1 +/-30 220 C5120 NOT PLACED 2113740F59 CAP CHIP REEL CL1 +/-30 220 C602 C5097 2113740F59 CAP CHIP REEL CL1 +/-30 220 C5098 2113740F59 C5099 2113740F59 Circuit Ref. Motorola Part No. C5095 2113740F59 C5096 Circuit Ref. Motorola Part No.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 4-53 Circuit Ref. Motorola Part No. COIL AW 2 TURN 17 NH L216 2462587N44 7686135U02 FLTR,EMI L217 2462587Q42 L118 7686135U02 FLTR,EMI L218 NOT PLACED L119 7686135U02 FLTR,EMI L300 2460591C35 COIL AIR WOUND INDUC 18.08 L301 2462587N55 CHIP IND 150 NH 5% L302 2462587N55 CHIP IND 150 NH 5% L303 2462587X69 IND CHIP LO-PRO 1200 NH 5% Circuit Ref. Motorola Part No. L115 2460592A01 L117 Circuit Ref. Motorola Part No.
4-54 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. TSTR NPN 40V .2A GEN PURP Q505 4813824A10 4802245J95 BJT, NPN TRANSISTOR Q506 4813824A10 4809939C04 TSTR DUAL PNP/NPN UMC3 R101 1705603W01 RES SMT SHUNT Circuit Ref. Motorola Part No. Q302 4813824A10 Q303 Q304 Description Circuit Ref. Motorola Part No. TSTR NPN 40V .2A GEN PURP R130 0662057B47 CHIP RES 0 OHMS +-.050 OHMS TSTR NPN 40V .
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics 4-55 Circuit Ref. Motorola Part No. CHIP RES 100K OHMS 5% R216 0662057A59 0662057C35 CHIP RES 22 OHMS 5% R217 R191 0662057C35 CHIP RES 22 OHMS 5% R192 0662057C35 CHIP RES 22 OHMS 5% R193 NOT PLACED Circuit Ref. Motorola Part No.
4-56 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. CHIP RES 33K OHM 5% R471 0662057A01 0662057A85 CHIP RES 33K OHM 5% R472 NOT PLACED R438 0662057A73 CHIP RES 10K OHMS 5% R439 0662057A73 CHIP RES 10K OHMS 5% R440 0662057A73 CHIP RES 10K OHMS 5% R441 0662057A73 CHIP RES 10K OHMS 5% Circuit Ref. Motorola Part No. R435 0662057A85 R436 R442 0662057A73 Description R473 R5000 NOT PLACED 0662057B47 Description Circuit Ref. Motorola Part No.
UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Circuit Ref. Motorola Part No. R5085 NOT PLACED R5086 0662057A43 CHIP RES 560 OHMS 5% R5087 0662057A97 CHIP RES 100K OHMS 5% R5088 0662057B47 CHIP RES 0 OHMS +-.050 OHMS Description GCAM DUMMY PART NUMBER R5089 NOT PLACED GCAM DUMMY PART NUMBER R5092 NOT PLACED GCAM DUMMY PART NUMBER R5093 R5094 R5095 NOT PLACED NOT PLACED NOT PLACED GCAM DUMMY PART NUMBER GCAM DUMMY PART NUMBER 4-57 Circuit Ref. Motorola Part No.
4-58 UHF 25-40 W Band 3 PCB 8486577Z03 / Schematics Notes
