Service manual

ManualsBrandsMaxon ManualsAutomotiveFM Mobile radio SM-2000

MAXON AMERICA, Inc.

10828 N. W. Air World Drive

Kansas City, MO 64153

Phone 816-891-6320 Fax 816-891-8815

680-100-0045 Revision C ECO 98017

December 98

SM-2000

SERVICE MANUAL

Summary of content (74 pages)

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SM-2000 SERVICE MANUAL MAXON AMERICA, Inc. 10828 N. W.
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MAXON SM-2000 MOBILE TABLE OF CONTENTS TABLE OF CONTENTS Table Of Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Transceiver Nominal Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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MAXON SM-2000 MOBILE TABLE OF CONTENTS Schematics and Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 SM-2150/VHF Front End Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 SM-2450/UHF Front End Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 SM-2000 TCXO Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 MA-4472 Microphone Schematic . . .
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MAXON SM-2000 MOBILE SPECIFICATIONS SPECIFICATIONS TRANSCEIVER NOMINAL PERFORMANCE Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FTZ 17TR2049 July 88 TIA/EIA-603 IEC 68 Series EC 529 IP54 MIL STD 810 C,D,E RF Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 W Modulation Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G3E/F3E (PM/FM) Audio power . . . . . . . . . . . . . . . . . . . . . . .
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MAXON SM-2000 MOBILE SPECIFICATIONS Switching range TX and RX (without re-tuning) Operational Bandwidth BAND TX MIN RX MIN MAX MAX VHF Band 1 136 162 136 162 VHF Band 2 148 174 148 174 UHF Band 1 400 430 400 430 UHF Band 2 420 450 420 450 UHF Band 3 440 470 440 470 UHF Band 4 470 490 470 490 UHF Band 5 490 512 490 512 Channel spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 kHz / 20 kHz / 12.5 kHz programmable (25 kHz - 12.
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MAXON SM-2000 MOBILE SPECFICATIONS Channel Spacing (kHz) Without sub audible tone modulation With sub audible tone modulation @ 10% peak deviation MAX DEV 25 + 5.0 kHz + 5.0 kHz 12.5 + 2.5 kHz + 2.5 kHz Audio characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (Method as FTZ 17 TR 2049 July 1988) MOD Type G3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Within +1/-3 dB of 6 dB/octave pre-emphasis curve: 300 Hz – 2.55 kHz for 12.
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MAXON SM-2000 MOBILE SPECIFICATIONS TX TONE MODULATION CHARACTERISTICS Sub audible tones - CTCSS Tone range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 – 250 Hz @ 0.3 % accuracy Tone standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RS-220A EIA Standard Non-standard tones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 – 260 Hz @ 0.3 % accuracy Nominal tone deviation. . . . . . . . . . . . . .
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MAXON SM-2000 MOBILE SPECIFICATIONS AF power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 W maximum @10% Distortion into a 4 ohm load. 4 Watts nominal. AF frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Method as FTZ 17 TR 2049 July 1988 MOD Type G3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Within +1/-3 dB of 6 dB/octave de-emphasis curve 300 Hz – 2.55 kHz for 12.
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MAXON SM-2000 MOBILE INTRODUCTION INTRODUCTION Advanced state-of-the-art technology is used in the design and manufacturing of the SM-2000 Mobile. The Phase Lock Loop (PLL) synthesizer provides more flexibility and capability in the SM-2000 Mobile. This scanning mobile has 4 channel capability. It offers CTCSS, DCS, scanning, priority channel, and many other functions. All these functions are controlled by the micro controller.
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MAXON SM-2000 MOBILE UNPACKING INFORMATION UNPACKING INFORMATION Check the carton carefully for the following items: 1 Transceiver Unit 2 Microphone 3 DC Power Cord 4 Mobile Mounting Bracket 5 Assembly Hardware 6 Operating Guide Page-7December 98
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MAXON SM-2000 MOBILE GENERAL DESCRIPTION GENERAL DESCRIPTION The Maxon SM-2000 is a rugged two way FM mobile radio which operates from 136-174 MHz (VHF) in two bands & 400-512 MHz (UHF) in five bands. The SM-2000 is a synthesized radio utilizing microcomputer technology to provide reliable high quality simplex two-way mobile communications. The SM-2000 transmitter output power level is 25 watts over a wide bandwidth, with a receiver operational bandwidth that covers the specified frequency band.
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MAXON SM-2000 MOBILE DESCRIPTION OF CONTROLS DESCRIPTION OF CONTROLS Figure 1 SM-2000 Front Panel DESCRIPTION OF CONTROLS The controls, indicators and microphone/programming connector are located on the front panel. The Monitor and Auxiliary buttons are located on the radio’s front panel. The following table details the Mobile controls, indicators, and connections. TABLE 2 Controls, Indicators, And Connections ITEM FUNCTION 1. Channel Select Switch Rotary switch, used to select one of 4 channels (max.
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MAXON SM-2000 MOBILE DESCRIPTION OF CONTROLS Rear Panel Connections ITEM FUNCTION 1. Antenna Connector ( S0-239 ) 50 ohm connector 2. DC Power Connector Used to connect the mobile to the power supply 13.2 VDC or 13.8 VDC U.S.A. 3.
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MAXON SM-2000 MOBILE THEORY OF OPERATION THEORY OF OPERATION Each of the Scanning Mobile radios, UHF & VHF, include a unique main P.C.B. consisting of RF, Digital and Analog circuitry. DIGITAL CIRCUITRY IC 411 and IC412 are digitally-controlled analog switches which internally consist of three single pole, double throw switches. By placing a high (5V) or low (0V) on the control lines which consists of A,B, and C. “A” controls the X ports “B” controls the Y ports and “C” controls the Z ports.
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MAXON SM-2000 MOBILE THEORY OF OPERATION EEPROM RX/TX channels, CTCSS/DCS as well as other data from the programmer are stored in the EEPROM. The data stored is retained without power supplied. This is a non-volatile memory. The EEPROM may have information re-programmed or erased. IC408 is an EEPROM with 2048 (256x 8) bit capacity and data is written and read serially, with the Programming cable through the front panel microphone connector. High Pass Filter The high pass filter is an 8-pole .
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MAXON SM-2000 MOBILE THEORY OF OPERATION PLL IC101 (MC1459IF) is a PLL frequency synthesizer with an on-board 1.1 GHZ divide by 64/65 dual modulus prescaler. In addition to the prescaler and frequency counters, the synthesizer IC has a a phase detector and a C register (Configuration register) that allows certain functions to be configured as desired. The synthesizer is serially controlled by three wire input to the IC. Serial data is fed to pin 19 of the IC.
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MAXON SM-2000 MOBILE THEORY OF OPERATION RF SECTION (SM-2150/VHF) VHF Transmitter The Transmitter is comprised of: 1. Microphone Audio Circuit 2. Transmitter Stage and Harmonic Filter 3. Automatic Power Control 4. Frequency Synthesizer Circuit Microphone Audio Circuit Microphone audio from the digital circuitry is amplified, pre-emphasized, limited, and mixed with Sub-Audible and applied to the VCO at Pin 1, through RV101, to balance VCO and TCXO modulation.
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MAXON SM-2000 MOBILE THEORY OF OPERATION RX VCO The RX VCO comprises JFET Q351, coil L356 and varactor D353 and is configured as a Colpits oscillator. D353 produces a change in frequency with a change in DC voltage and is controlled by the phase detector signal present at the anode. The local oscillator signal at the drain of Q351 is applied to RF out of the module when diode D103 is reverse biased and D104 is forward biased. L356 is used for PLL alignment.
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MAXON SM-2000 MOBILE THEORY OF OPERATION Out of Lock Detector The out-of-lock detector produces a high logic level when Fr and Fv are in the same phase and frequency, low logic level pulses when the loop is out-of-lock at Pin 2 of IC101. The signals at Pin 2 of IC101 are buffered by Q106 and then integrating by R114 and C122. The product of the integrating circuit is fed to L/D port. Prescaler The internal Prescaler of IC101 divides the incoming signal frequency from the VCO via input pin 1 by 64 or 65.
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MAXON SM-2000 MOBILE THEORY OF OPERATION Receiver Audio Circuit The receiver audio circuit is comprised of a low pass filter and an audio amplifier on the RF PCB. Low Pass Filter The low pass filter is configured from coil L227, capacitor C201 and resistor R206.AF signals from Pin 9 of IC109 are filtered by the low pass filter to remove any components of the 455kHz IF signal. The filtered is passed to the high pass filter.
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MAXON SM-2000 MOBILE THEORY OF OPERATION RF SECTION (SM-2450/UHF) UHF Transmitter The Transmitter is comprised of: 1. Microphone Audio Circuit 2. Transmitter Stage and Harmonic Filter 3. Automatic Power Control 4. Frequency Synthesizer Circuit Microphone Audio Circuit Microphone audio is pre-emphasized, limited and mixed with sub-audible tones to provide the modulating signal for the transmitter.
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MAXON SM-2000 MOBILE THEORY OF OPERATION Voltage Controlled Oscillator Circuit The circuit produces carrier frequencies during transmit and local oscillator frequencies during receive. Transistor Q107 is configured as a power supply ripple filter. The VCO utilizes transistor Q108, varactor D101 , D102 and trimmer capacitor TC101 . These components are configured as a Colpitts oscillator. D101 and D102 produce a change in frequency with a change in DC voltage and are controlled by the phase detector.
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MAXON SM-2000 MOBILE THEORY OF OPERATION The quadrature detector is also configurable for narrow or wide channel spacing by software control of Q219 and diode D127. These components with R219 parallel R211 to maintain audio output at the proper level for the selected bandwidth. Q134 inserts wideband squelch adjustment RV102 into the circuit whenever standard filter CF104 is selected. This tends to broaden the filter response and provide the higher frequency noise components needed to activate the squelch.
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MAXON SM-2000 MOBILE TEST SETUP TEST SETUP TRANSMIT TESTS VARIABLE POWER SUPPLY WITH DC VOLT/CURRENT METER POWER METER FREQUENCY COUNTER DEVIATION METER SM-2000 OSCILLOSCOPE TEST BOX DISTORTION ANALYZER DUMMY LOAD ATTENUATOR AUDIO GENERATOR RECEIVER TESTS COMMUNICATION MONITOR OR FM SIGNAL GENERATOR SINAD METER OSCILLOSCOPE SM-2000 PAD VARIABLE POWER SUPPLY AC VTVM Page-21December 98 DISTORTION ANALYZER
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MAXON SM-2000 MOBILE SM-2150/VHF ALIGNMENT PROCEDURE SM-2150/VHF ALIGNMENT PROCEDURE It is important that the TCXO be on the correct frequency before performing a complete alignment of the radio. An incorrect TCXO frequency can impair the performance and even cause mis-alignments. Normally the transmitter is monitored with a frequency counter or service monitor while the transmitter is keyed at it’s highest frequency. The TCXO is adjusted for the least frequency error.
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MAXON SM-2000 MOBILE SM-2150/VHF ALIGNMENT PROCEDURE Receiver Alignment RF • NOTE: The Receiver front end is a pre-aligned module. There are no available field adjustments. 1. Connect an RF signal generator to the ANT socket and a SINAD meter to the external speaker jack ( J1 ) located at the rear panel. 2. Adjust RV103 to the fully open position to hear receiver noise. 3. Adjust the VOLUME control to mid position. 4. Using the channel switch, select the programmed middle receive frequency. 5.
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MAXON SM-2000 MOBILE SM-2150/VHF ALIGNMENT PROCEDURE Squelch Adjustment 1. Select a receiver channel that is programmed for narrow band (12.5 kHz) operation. 2. Set the RF signal generator to the receiver frequency. Set the AF modulation signal to 1 kHz at 1.5k deviation. 3. Adjust the RF output level of the RF signal generator until the 1 kHz signal is heard. 4. Adjust the RF signal to the level desired for squelch sensitivity as you monitor SINAD. This is usually 8dB to 12dB SINAD. 5.
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MAXON SM-2000 MOBILE SM-2150/VHF ALIGNMENT PROCEDURE CTCSS/DCS Deviation Adjustment • Note:The following adjustment should be preset with factory alignment. If an adjustment must be made the following procedures must be followed: 1. Program the radio with a 67.0Hz tone on one channel and 250.3Hz on another channel. 2. Connect a power meter and modulation meter to the radio antenna jack. 3. Adjust RV101 to the center of its adjustment. • Note:Release the PTT button when changing channels. 4.
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MAXON SM-2000 MOBILE ALIGNMENT POINTS DIAGRAM (SM-2150/VHF) ALIGNMENT POINTS DIAGRAM (SM-2150/VHF) RV103 RV104 RV105 TX HI POWER TX LOW POWER SQUELCH 12.
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MAXON SM-2000 MOBILE SM-2450/UHF ALIGNMENT PROCEDURE SM-2450/UHF ALIGNMENT PROCEDURE It is important that the TCXO be on the correct frequency before performing a complete alignment of the radio. An incorrect TCXO frequency can impair the performance and even cause mis-alignments. Normally the transmitter is monitored with a frequency counter or service monitor while the transmitter is keyed at its highest frequency. The TCXO is adjusted for the least frequency error.
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MAXON SM-2000 MOBILE SM-2450/UHF ALIGNMENT PROCEDURE 11. Adjust the RF output voltage level of the RF signal generator keeping the SINAD meter readings between 6dB and 12dB . 12. Check for an RF voltage signal level of 0.31uV and a SINAD meter reading of 12dB or greater. 13. Select the highest receive frequency and check for a SINAD meter reading of 12dB or greater, at 0.42uV . (Sensitivity at the operational band edge). 14.
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MAXON SM-2000 MOBILE SM-2450/UHF ALIGNMENT PROCEDURE Automatic Power Adjustment • NOTE: Continuous transmit periods longer than 5 minutes are to be avoided. 1. Connect the antenna output to an RF power meter or service monitor. 2. Set the PTT switch to the ON position. 3. Adjust the Variable resistor RV104 to give the appropriate transmit power. Nominally this is 25watts . 4. Set the PTT switch to the OFF position. 5. Select a channel programmed to low transmit power. 6.
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MAXON SM-2000 MOBILE SM-2450/UHF ALIGNMENT PROCEDURE Modulation Deviation Adjustment 1. Connect a power meter and a coupler to the radio. 2. Connect an AF generator to the test box. 3. Set the audio output to 30mV and the audio frequency to 1kHz . 4. Using the channel switch, select the highest transmit channel that does not have CTCSS or DCS programmed. 5. Press and hold the PTT switch. 6. Adjust RV402 for 90% of maximum, system deviation. 6a. Adjust RV402 for 2.25kHz for narrow band (12.5kHz).
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MAXON SM-2000 MOBILE ALIGNMENT POINTS DIAGRAM (SM-2450/UHF) ALIGNMENT POINTS DIAGRAM (SM-2450/UHF) TX HI PWR RV103 RV104 T103 SQUELCH 12.
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MAXON SM-2000 MOBILE COMPONENT REPLACEMENT COMPONENT REPLACEMENT SURFACE MOUNT COMPONENTS Surface mount components should always be replaced using a temperature controlled soldering system. The soldering tools may be either a temperature controlled soldering iron or a temperature controlled hot-air soldering station. A hot-air system is recommended for the removal of components on these boards. With either soldering system, a temperature of 700° F (371° C) should be maintained.
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MAXON SM-2000 MOBILE COMPONENT REPLACEMENT SURFACE MOUNT COMPONENT REPLACEMENT 1. “Tin” one terminal end of the new component and the corresponding pad of the PCB. Use as little solder as possible. 2. Place the component on the PCB pads, observing proper polarity for capacitors, diodes, transistors, etc. 3. Simultaneously touch the “tinned” terminal end and the “tinned” pad with the soldering iron. Slightly press the component down on the board as the solder liquefies.
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MAXON SM-2000 MOBILE PARTS LIST COMMON TO SM-2000 PARTS LIST COMMON TO SM-2000 REF # DESCRIPTION PART # 650-100-0002 TCXO PCB ASSY. (SEE NOTE 1) REF # DESCRIPTION PART # 650-050-0003 CONTROL HEAD PCB ASSY. 650-090-0003 MA-4472 MIC ASSY.
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MAXON SM-2000 MOBILE 650-000-0001 SM-2150/VHF MAIN BOARD 650-000-0001 SM-2150/VHF MAIN BOARD DIGITAL SECTION Digital Parts Common on Both VHF & UHF REF # DESCRIPTION PART # REF # DESCRIPTION CHIP CERAMIC 0.001UF 130-A17-6Z C450 CHIP CERAMIC C402 CHIP CERAMIC 0.22UF 130-270-7Y C452 CHIP TANTALUM C403 CHIP CERAMIC 0.01UF 130-172-2Z C453 CHIP CERAMIC C404 ELECT CAPACITOR 101-025-9 C454 CHIP TANTALUM C405 CHIP CERAMIC 220PF 132-220-2Z C455 CHIP CERAMIC 0.
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MAXON SM-2000 MOBILE 650-000-0001 SM-2150/VHF MAIN BOARD DIGITAL SECTION (continued) Digital Parts Common on Both VHF & UHF REF # DESCRIPTION PART # REF # DESCRIPTION PART # Q550 TRANSISTOR 202-113-1 R447 CHIP RESISTOR 120K 060-124-6Z Q551 TRANSISTOR 202-113-1 R448 CHIP RESISTOR 220K 060-224-4Z Q552 TRANSISTOR 202-113-1 R449 CHIP RESISTOR 820 060-821-3Z Q553 TRANSISTOR 202-113-1 R450 CHIP RESISTOR 22K 060-223-3Z R186 CHIP RESISTOR 47K 060-473-2Z R451 CHIP RESISTOR 2.
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MAXON SM-2000 MOBILE 650-000-0001 SM-2150/VHF MAIN BOARD BAND CHART SM-2150L VHF BAND 1 (136-162 MHz) REF # DESCRIPTION FRONT-END PCB ASSEMBLY PART # SM-2150H VHF BAND 2 (148-174 MHz) REF # 650-110-0011 MAIN BOARD PARTS DESCRIPTION FRONT-END PCB ASSEMBLY PART # 650-110-0002 MAIN BOARD PARTS C155 CHIP CERAMIC 4PF 134-007-7Y C155 CHIP CERAMIC 11PF 131-103-5Y C160 CHIP CERAMIC 24PF 132-407-5Y C160 CHIP CERAMIC 24PF 132-407-5Y C164 CHIP CERAMIC 18pF 131-816-6Y C164 CHIP CERAMIC 24PF
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MAXON SM-2000 MOBILE 650-000-0001 SM-2150/VHF MAIN BOARD REF # DESCRIPTION PART # REF # DESCRIPTION PART # FRONT-END PCB ASSEMBLY (REFER TO BAND CHART) C183 CHIP CERAMIC 47PF 134-722-1Y C1 CHIP CERAMIC 470PF 134-761-4Y C184 CHIP CERAMIC 33PF 133-306-2Y C101 CHIP CERAMIC 220PF 132-220-2Y C185 CHIP CERAMIC 20PF 132-012-1Y C102 CHIP CERAMIC 220PF 132-220-2Y C186 CHIP CERAMIC 0.1UF 130-A60-4Y C103 CHIP CERAMIC 220PF 132-220-2Y C187 CHIP CERAMIC 0.
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MAXON SM-2000 MOBILE 650-000-0001 SM-2150/VHF MAIN BOARD REF # DESCRIPTION C247 CHIP CERAMIC 220PF C248 CHIP CERAMIC 27PF C250 ELECT CAPACITOR C251 CHIP CERAMIC C252 CHIP CERAMIC C253 PART # REF # DESCRIPTION PART # 132-220-2Y C355 CHIP CERAMIC 1.2PF 131-216-4Y 132-714-2Y C356 CHIP CERAMIC 4PF 134-007-7Y 104-713-2 C359 CHIP CERAMIC 0.001UF 130-A17-6Y 470PF 134-761-4Y C360 CHIP CERAMIC 2PF 132-011-0Y 0.001UF 130-A17-6Y C361 CHIP CERAMIC 0.
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MAXON SM-2000 MOBILE 650-000-0001 SM-2150/VHF MAIN BOARD REF # DESCRIPTION PART # REF # DESCRIPTION PART # L113 COIL SPRING 310-794-0 Q127 TRANSISTOR L115 COIL SPRING 310-793-9 Q128 BRT 202-092-5 L116 COIL SPRING 310-224-2 Q130 TRANSISTOR 200-003-5 L117 COIL SPRING 310-368-9 Q132 TRANSISTOR 202-113-1 L118 COIL CHOKE 1K 310-218-7 Q133 TRANSISTOR 202-113-1 L119 COIL CHIP 310-706-1 Q134 TRANSISTOR 202-095-8Z L120 COIL CHOKE 1K 310-218-7 Q135 TRANSISTOR 202-095-8Z
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MAXON SM-2000 MOBILE 650-000-0001 SM-2150/VHF MAIN BOARD REF # DESCRIPTION PART # REF # DESCRIPTION PART # R146 CHIP RESISTOR 15K 060-153-3Z R206 CHIP RESISTOR 2.
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MAXON SM-2000 MOBILE 650-000-0002 SM-2450/UHF MAIN BOARD 650-000-0002 SM-2450/UHF MAIN BOARD BAND CHART SM-2450A UHF BAND 1 (400-430 MHz) REF # PART # VALUE SM-2450C UHF BAND 2 (420-450 MHz) REF # PART # VALUE SM-2450D UHF BAND 3 (440-470 MHz) REF # PART # VALUE FRONT-END PCB ASSEMBLY 650-110-0007 FRONT-END PCB ASSEMBLY 650-110-0008 FRONT-END PCB ASSEMBLY 650-110-0001 MAIN BOARD PARTS MAIN BOARD PARTS MAIN BOARD PARTS C130 C133 C134 C135 C136 C158 133-932-7Y 131-039-1Y 134-767-0Y 139-003-8Y
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MAXON SM-2000 MOBILE 650-000-0002 SM-2450/UHF MAIN BOARD BAND CHART(continued) SM-2450E UHF BAND 4 (470-490 MHz) REF # PART # VALUE SM-2450B UHF BAND 5 (490-512 MHz) REF # PART # VALUE FRONT-END PCB ASSEMBLY 650-110-0009 FRONT-END PCB ASSEMBLY 650-110-0010 MAIN BOARD PARTS MAIN BOARD PARTS C130 131-829-8Y 18pF C130 132-407-5Y 24pF C133 136-015-4Y 6pF C133 134-007-7Y 4pF C134 133-321-5Y 3.3pF C134 133-321-5Y 3.
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MAXON SM-2000 MOBILE 650-000-0002 SM-2450/UHF MAIN BOARD REF # DESCRIPTION PART # REF # DESCRIPTION PART # FRONT-END PCB ASSEMBLY (REFER TO BAND CHART) C163 CHIP CERAMIC 6PF 136-005-5Y ANT1 CONNECTOR ANT 422-907-0 C164 CHIP CERAMIC 12PF 131-208-7Y ANT1 CONNECTOR SW-1456(BNC-R) 421-655-7 C165 CHIP CERAMIC 6PF 136-005-5Y ANT1 PIN CU &1.1X13(101-01) 860-129 C167 CHIP CERAMIC 82PF 138-210-3Y C101 CHIP CERAMIC 220PF 132-220-2Y C168 CHIP CERAMIC 0.
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MAXON SM-2000 MOBILE 650-000-0002 SM-2450/UHF MAIN BOARD REF # DESCRIPTION C219 CHIP CERAMIC 220PF C220 C221 PART # REF # DESCRIPTION PART # 132-220-2Y C288 CHIP CERAMIC 220PF 132-220-2Y CHIP CERAMIC 220PF 132-220-2Y C289 CHIP CERAMIC 82PF 138-210-3Y DIP TANTALUM 1UF 141-008-6Z C290 CHIP CERAMIC 0.
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MAXON SM-2000 MOBILE 650-000-0002 SM-2450/UHF MAIN BOARD REF # DESCRIPTION PART # REF # DESCRIPTION PART # L101 COIL CHIP 0.68UH 310-711-5 Q132 TRANSISTOR 202-113-1 L102 COIL CHIP 0.
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MAXON SM-2000 MOBILE 650-000-0002 SM-2450/UHF MAIN BOARD REF # DESCRIPTION PART # REF # DESCRIPTION PART # R140 CHIP RESISTOR 10 060-100-5Z R202 CHIP RESISTOR 2.7K 060-272-7Z R141 CHIP RESISTOR 470 060-471-0Z R203 CHIP RESISTOR 150K 060-154-4Z R142 CHIP RESISTOR 10K 060-103-8Z R204 CHIP RESISTOR 1K 060-102-7Z R143 CHIP RESISTOR 1.8K 060-182-9Z R205 CHIP RESISTOR 100 060-101-6Z R144 CHIP RESISTOR 51 060-510-2 R206 CHIP RESISTOR 2.
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MAXON SM-2000 MOBILE COMPONENT PINOUT COMPONENT PINOUT = SM-2150/VHF = SM-2450/UHF Unless otherwise indicated all parts are common to the SM-2000 Series Radio. MANUFACTURER'S BASE DIAGRAM 41 PART NUMBER REFERENCE NO.
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MAXON SM-2000 MOBILE COMPONENT PINOUT = SM-2150/VHF = SM-2450/UHF Unless otherwise indicated all parts are common to the SM-2000 Series Radio. BASE DIAGRAM MANUFACTURER'S REFERENCE NO.
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MAXON SM-2000 MOBILE COMPONENT PINOUT = SM-2150/VHF = SM-2450/UHF Unless otherwise indicated all parts are common to the SM-2000 Series Radio. MANUFACTURER'S BASE DIAGRAM PART NUMBER C MMBV3401(4D) NC A REFERENCE NO.
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MAXON SM-2000 MOBILE VOLTAGE CHARTS (SM-2150/VHF) VOLTAGE CHARTS (SM-2150/VHF) IC409 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION DATA EEPROM ENABLE PLL ENABLE CHANNEL SPACING DATA IN RED L.E.D. BUSY EXT OPTION HOOK SW LOCK DET TEST X1 X2 (OPEN) GND D TO A D TO A TONE ENABLE D TO A CH-1 CH-2 TX 0 0 5 5/0 0 5 5/0 5 0/3.7 0 5 5 0 0 5/0 5/0 5/0 5/0 RX 0 0 5 5/0 0 0 0 5 0/3.7 0 5 5 0 0 0 0 0 0 PIN RX VOLTAGE TX VOLTAGE 1 0 0 2 4 1.2 3 1.9 1.
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MAXON SM-2000 MOBILE VOLTAGE CHARTS (SM-2150/VHF) IC404 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TX UNMODE 1.9 1.9 1.9 5 1.9 1.9 1.9 1.9 1.9 1.9 GND 1.9 1.9 1.9 IC407 RX MODE VOICE 1.9 VOICE 1.9 VOICE 1.9 5 VOICE 1.9 VOICE 1.9 VOICE 1.9 VOICE 1.9 VOICE 1.9 VOICE 1.9 GND VOICE 1.9 VOICE 1.9 VOICE 1.9 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 NORMAL 1.9 0 3.6 0 2 5 1.9 1.05 5 GND 5 0 2 2 RX 2.00 2.00 2.00 0 2.00 2.00 2.10 5.00 PIN 1 2 3 4 5 6 7 8 BUSY AUDIO AUDIO AUDIO 5 AUDIO AUDIO AUDIO AUDIO RX 1.9 1.9 1.
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MAXON SM-2000 MOBILE VOLTAGE CHARTS (SM-2150/VHF) IC109 PIN BUSY RX (MUTE) 1 7 7 2 OSC OSC 3 6 6 4 7.2 7.2 5 6 6 6 6 6 7 6 6 8 7.2 7.2 PIN BUSY RX (MUTE) 9 AUDIO AUDIO 10 0.8 0.8 11 NOISE NOISE 12 2.5 0 13 7 7 14 4.5 0 15 GND GND 16 2 2 1 0 3 5 5 11 2.7 2.7 4 5 5 12 5 5 5 5 5 13 3.5 3.5 6 PD 0 14 5 5 7 GND 0 15 0 0 8 0 2 16 0 0 19 0 0 20 OSC 2.3 TX C 3.5 2.5 5 7 7.2 12.5 1.5 0 2.5 8 0 E GND 1.3 2.3 1.2 GND 13.2 GND GND 0 8 GND 13.
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MAXON SM-2000 MOBILE VOLTAGE CHARTS (SM-2450/UHF) VOLTAGE CHARTS (SM-2450/UHF) IC409 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DESCRIPTION DATA EEPROM ENABLE PLL ENABLE CHANNEL SPACING DATA IN RED L.E.D. BUSY EXT OPTION HOOK SW LOCK DET TEST X1 X2 (OPEN) GND D TO A D TO A TONE ENABLE D TO A CH-1 CH-2 TX 0 0 5 5/0 0 5 5/0 5 0/3.7 0 5 5 0 0 5/0 5/0 5/0 5/0 RX 0 0 5 5/0 0 0 0 5 0/3.7 0 5 5 0 0 0 0 0 0 1 0 0 9 5 0 2 4 1.2 10 2 3 3 1.9 1.9 11 2.7 2.
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MAXON SM-2000 MOBILE VOLTAGE CHARTS (SM-2450/UHF) IC404 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TX UNMODE 1.9 1.9 1.9 5 1.9 1.9 1.9 1.9 1.9 1.9 GND 1.9 1.9 1.9 IC407 RX MODE VOICE VOICE VOICE 5 VOICE VOICE VOICE VOICE VOICE VOICE GND VOICE VOICE VOICE PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 NORMAL 1.9 0 0 3 2 5 1.9 0 5 GND 5 0 2 2 RX 2.00 2.00 2.00 0 2.00 2.00 2.10 5.00 PIN 1 2 3 4 5 6 7 8 BUSY AUDIO AUDIO AUDIO 5 AUDIO AUDIO AUDIO AUDIO RX 1.9 1.9 1.9 5 1.9 1.9 1.9 1.9 9 AUDIO 1.
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MAXON SM-2000 MOBILE VOLTAGE CHARTS (SM-2450/UHF) IC109 PIN BUSY RX (MUTE) 1 7 7 2 OSC OSC 3 6 6 4 7.2 7.2 5 6 6 6 6 6 7 6 6 8 7.2 7.2 PIN BUSY RX (MUTE) 9 AUDIO AUDIO 10 0.8 0.8 11 NOISE NOISE 12 0.6 1.8 13 7 7 14 0 8 15 GND GND 16 2 2 1 0 9 TEST 17 5 2 5 10 2 18 0 3 5 11 2 19 0 5 5 13 OSC 6 PD 14 5 7 GND 15 0 8 0 16 0 TX C 3.5 1.8 4.3 2.5 5 7.5 7.5 12.5 5 0 8 E 0.6 GND 2 GND 2.3 1.2 GND 13.2 1.4 GND 8 6.7 0 6.
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MAXON SM-2000 MOBILE TROUBLE SHOOTING CHART (SM-2000) TROUBLE SHOOTING CHART (SM-2000) Status Indications & Audible Tones STATUS DESCRIPTION LED COLOR AUDIBLE TONE Power on ready N/A Melody Busy Yellow N/A Correct Tone Green N/A Transmit Red N/A Scan Green, Flashing N/A Busy Lock Yellow, Flashing Single Tone NORMAL Time Out Timer N/A Single Tone Battery Low Red, Flashing Four Tone, Repeated EEPROM Error Red, Flashing Single Tone Repeated PLL Error Red, Flashing Double Ton
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MAXON SM-2000 MOBILE TROUBLE SHOOTING CHART (SM-2000) No TX 1. Defective MIC 2. Defective CPU IC409 3. Defective IC412 No TX Power 1. Defective TX enable Q122 2. Defective APC Control Circuit Q125 3. Defective TX Power Buffer AMP Q116 and Q117 4. Defective TX Power Amp (SM-2150) Q118,Q120 5. Defective TX Power Module (SM-2450) IC103 6. Defective ANT SW D108 and D120 7. Defective ANT Connector Over Power 1. Programming 2. Q125 Short 3. Defective D107 and APC Circuit Low TX Power Output 1.
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REPLACEMENT MODULE SCHEMATICS 4 C816 0.001 5 C821 270P C817 56P R804 180 (470) R801 6.8K L804 6T L806 L805 6T 6T Q800 MMBR951 R702 * R800 820 C807 33P C811 100P L802 6T C805 6P C803 33P C818 100P C815 150P 6T C802 100P C812 39P R803 2.2 R802 3.3K C801 39P C808 100P R701 1 * C804 D800 KDS226 R714 2.2K R705 47K R703 C705 100pF C821 27P C703 91pF L801 6T C701 100pF TC701 20pF R709 39K C704 180pF R711 4.7K C819 6.8P C818 6.8P C816 7P C815 15P C813 18P C810 0.
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SW 1 CORD901 C815 470P SW 2 MIC901 N/C 1 B+ N/C 5 3 GROUND AUDIO 2 TX 6 AUDIO 4 MON/HOOK + C903 - MIC TEL (RED) SP (GREEN) (WHITE) (YELLOW) GND (SHIELD) GND VRT2 (BLACK) CURRENT LIMITER C821 0.001 TX R821 22 SWITCH VR801 10KR C808 47P C823 10/25(E) SW POW ER Q822 KRA1504S CS PTT R822 4.7K Q821 KRA1504S PLUG 470P RX SP1 4 OHM 4W PTT MIC HANGER 13.8 PTT MIC HANGER CS L901 HOOK 1MH C901 0.001(M) D807 5.1V VRT 1 D808 5.1V D810 5.1V C801-805 47P D811 5.
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REVISIONS REV A DESCRIPTION RELEASED TO MANUFACTURING CHG BY DATE JPW 9/96 V0100003.CDR CORELDRAW 09-10-96 R UNLESS OTHERWISE NOTED DIMENSIONS ARE IN MILLIMETERS HOLES -+ NA TOLERENCES: LINEAR .XX .
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REVISIONS REV DESCRIPTION A B C D CHG RELEASED TO MANUFACTURING ECO 97014 Change to Sheet 1, Digital Section Only ECO 97020 ECO 98017 Change to Sheet 2, RF Section Only BY DATE JPW JPW JPW JPW 9/96 4/97 4/97 11/98 DIGITAL.DWG AUTOCAD R13c4 11-18-98 R UNLESS OTHERWISE NOTED DIMENSIONS ARE IN MILLIMETERS HOLES -+ Page-62December 98 NA TOLERENCES: LINEAR .XX .
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REVISIONS REV DESCRIPTION A B C D CHG RELEASED TO MANUFACTURING ECO 97014 Change to Sheet 1, Digital Section Only ECO 97020 ECO 98017 Change to Sheet 2, RF Section Only JPW JPW JPW JPW BY DATE 9/96 4/97 4/97 11/98 770-000-0001revD.DWG AUTOCAD R13c4 12-05-98 R UNLESS OTHERWISE NOTED DIMENSIONS ARE IN MILLIMETERS HOLES -+ NA TOLERENCES: LINEAR .XX .
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REVISIONS REV A DESCRIPTION RELEASED TO MANUFACTURING CHG -+ Page-64December 98 NA TOLERENCES: LINEAR .XX .
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SPKR SW5 LED4 LED3 D804 D801 D805 LED2 LED1 SW2 R801 C807 C809 SW4 C283 SW3 LED5 CON801 SM-2000 CONTROL HEAD SM-2000 CONTROL HEAD 650-050-0003 650-050-0003 Page-65December 98
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RVC01 Page-66December 98 SM-2150/VHF MAIN BOARD ASSY. SM-2150/VHF MAIN BOARD ASSY.
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R125 R551 C550 R196 D402 R435 LK8 CON404 LK15 C367 LK12 LK13 LK9 LK4 R438 C453 R415 C417 R448 C403 R446 C447 R459 C442 R453 C443 R454 R456 C464 C445 R455 LK2 R429 C454 LK10 IC404 D401 LK1 R460 R461 LK5 IC410 R444 R416 R411 C233 CON L229 C113A TCXO1 Q406 Q405 IC409 R433 RV402 C232 C422 C423 R437 IC406 IC108 IC107 C226 CON401 X401 LK11 PWR CON403 C568 C438 D124 C222 IC408 C437 Q407 R436 C435 R423 LK6 LK7 R473 R431 R430 R428 R427 R426 C428 R462 R465 R464 R463 R434
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SM-2000 EXPLODED VIEW Page-68December 98
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SM-2150/VHF EXPLODED VIEW PARTS LIST SM-2450/UHF EXPLODED VIEW PARTS LIST REF # PART # DESCRIPTION QTY REF # PART # DESCRIPTION QTY 1 801-282-A E.S.C NORYL N190J-7002 1 1 801-282-A E.S.C NORYL N190J-7002 1 2 905-510 FELT 30-R16.5 (2) XT0.3 FELT BLK 1 2 905-510 FELT 30-R16.5 (2) XT0.3 FELT BLK 1 3 795-654 OVERLAY LEXAN T0.5 1 3 795-654 OVERLAY LEXAN T0.
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Intentionally Left Blank Page-70December 98