SP-300 Series SERVICE MANUAL Maxon America, Inc. 10828 N.W. Airworld Dr.
MAXON SP-300 HAND HELD TABLE OF CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 DESCRIPTION OF CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 THEORY OF OPERATION . . .
MAXON SP-300 HAND HELD Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAXON SP-300 HAND HELD SPECIFICATIONS GENERAL Equipment Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hand portable Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UHF/ VHF Channel Spacings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5 kHz, 25 kHz programmable RF Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5/ 1 watt Modulation Type . . .
MAXON SP-300 HAND HELD FREQUENCY BANDS RX TX VHF: V2 148.000 - 174.000 MHz 148.000 - 174.000 MHz UHF: U2 440.000 - 470.000 MHz 440.000 - 470.000 MHz DIMENSIONS Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (141mm)H x (58 mm)W x (37 mm)D WEIGHT Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225 grams With 1350 mAh Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAXON SP-300 HAND HELD Transmitter Audio Distortion (Without CTCSS) . . . . . . . . . . . . < 5% @ 1 kHz Hum & Noise: 12.5 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 40 dB (with PSOPH) 25 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 40 dB (with no PSOPH) Load Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAXON SP-300 HAND HELD RX TONE DEMODULATION CHARACTERISTICS SUBAUDIO TONES - CTCSS Tone Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Hz to 250.3 Hz Non-Standard Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Hz to 260 Hz Due to continuing research and development the company reserves the right to alter these specifications without prior notice.
MAXON SP-300 Series HAND HELD SP-300 INTRODUCTION FEATURES The SP-300 Series of portable radios from Maxon, utilizes the latest technology in its design and manufacturing. Both the VHF and UHF models are PLL (Phase Lock Loop Synthesizer) / microprocessor controlled, and offer 1 or 5 watts of power with 4 & 16 channel capability. Multiple functions including Scan, CTCSS / DCS signaling and 12.5 & 25 kHz channel spacing are standard in these fully programmable wide bandwidth handheld units.
MAXON SP-300 HAND HELD A priority channel can be selected while programming the radio. A priority channel is a channel that can be periodically checked or looked back to while receiving on any channel in the scan list, or in normal operation. It can also be selected for all transmissions during scan mode. To transmit on a channel in the scan list, the channel selector must be placed on the channel that the transmission is to be made on.
MAXON SP-300 Series HAND HELD VCO Lock Time The micro will allow more lock time for the VCO before the out-of-lock beep indication. Low Battery Indication Low Battery Indication will be changed so that it does not inhibit RX and will allow one transmission after low cell is indicated. Low cell will not be indicated during transmit mode. If the battery goes below specified limits during the TX mode, low cell will be indicated immediately after releasing the PTT button.
MAXON SP-300 HAND HELD DESCRIPTION OF CONTROLS The controls, indicators and antenna connections on the VHF and UHF Scanning Handheld Series radios are all located on the top panel. The accessories socket is located on the radio chassis right hand side. The monitor and PTT buttons are located on the radio chassis left hand side. ITEM DESCRIPTION 1. Antenna Connector 1/4" UNEF socket 2. 4 Channel Select Switch Rotary switch, used to select one of four and to engage in scanning function 3.
MAXON SP-300 HAND HELD THEORY OF OPERATION The VHF and UHF scanning handheld series radios are comprised of one main PCB. The main PCB contains the transmitter, receiver and control circuits. The control circuits contain the micro controller and associated digital circuits. DIGITAL CIRCUITS IC 411 is a digitally-controlled analog switch which internally consists 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.
MAXON SP-300 HAND HELD Mute (squelch) Circuit The mute circuit which is controlled by the output of IC409 (micro) Pin 77 (386EN) is connected to Q34 via R122 which mutes the LM386IC on the RF circuits. Pin 77 also controls IC402B which mutes the audio path to the RF circuits. TX Audio And Filter Circuits The TX audio from the internal mic or external mic is fed into IC411 (Pin 3). The TX audio is output on Pin 4 (IC411) and into the high pass filter (IC410), where sub-audible voice products are removed.
MAXON SP-300 HAND HELD RF CIRCUITS PLL SYNTHESIZER for the non-linearity of the vco due to modulation diode, and maintain a constant modulation regardless of frequency. 12.8 MHz TCXO The TCXO contains the 3-stage thermistor network compensation and crystal oscillator and modulation ports. Compensation is +/-5 PPM or less from -30c to +60c. PLL IC Dual Modules Prescaler Input frequency of 12.8 MHzto IC2 MC14519 pin 20 is divided to 6.
MAXON SP-300 HAND HELD filters provide the adjacent channel selectivity of 25 kHz or 12.5 kHz bandwidth. Squelch (mute) Circuit The squelch circuit switches off the power amplifier when no audio signal is present. The squelch circuit consists of a 16 kHz band pass filter and a noise detector circuit. 16 kHz Band Pass Filter The audio signal from Pin 9 of IC5 (MC3371) is filtered by a 16 kHz band pass filter consisting of L16 and L17.
MAXON SP-300 HAND HELD MAINTENANCE AND REPAIR GENERAL 3 4 VOL CH ANT 1 When removing or fitting, use the Exploded View and Parts List (Page 51) in conjunction with the following procedures: on x a m REMOVING & REPLACING THE BELT CLIP 2 1 Any repair or adjustment should only be made by or under the supervision of a qualified radio service technician. 2 Removing the belt clip: 1. Depress the metal release tab located on the top of the belt clip with one hand. 2.
MAXON SP-300 HAND HELD REMOVING & REPLACING THE BATTERY To remove the battery: 1. Holding the radio chassis in one hand, press and hold the battery release catch on the upper back of the radio with the other hand. 1 2 1 3 4 VOL 2 1 CH 3 ANT 4 VOL CH ANT 2. Pull the battery back and away from the radio. 3. Remove the battery from the radio. 2 Figure 3-Battery Removal To replace the battery: 1. Position the battery on the battery guide rail at the bottom of the radio. 2.
MAXON SP-300 HAND HELD 2 1 3 4 VOL 2. By placing thumb under bottom of the PTT assembly and gently pulling outward, unplug PTT Assembly from Main Board. CH ANT To replace the PTT assembly: 2 1. Reverse the steps taken to remove the PTT assembly. 2. Insure that the PTT jack is aligned properly when inserting into Main Board. REMOVING & REPLACING THE ACCESSORY CONNECTOR Figure 5-PTT Installation To remove the Accessory Connector: l A C H 2 1 L O V 1.
Figure 9A-Back Cover Removal & Installation MAXON SP-300 HAND HELD 2 1 3 REMOVING & REPLACING THE BACK COVER VOL 4 CH ANT To remove the Back Cover: 1. Remove battery. (Refer to Removing &Replacing the Battery) 2. Unscrew the four Back Cover mounting screws located on the Back Cover of the radio. Figure 8-Back Cover Removal & Installation 3. Remove the Back Cover by pulling the lower battery bracket away from the radio. 2 1 3 4 VOL CH ANT 4.
MAXON SP-300 HAND HELD REMOVING & REPLACING THE MAIN BOARD 7 To remove the Main Board: 1. Remove the Battery (Refer to Removing & Replacing the Battery). 2. Remove the PTT Assembly (Refer to Removing & Replacing the PTT Assembly). 3. Remove the Dust Cap (Refer to Removing & Replacing the Dust Cap). 6 4. Remove the Antenna & Control Knobs (Refer to Removing & Replacing the Antenna & Control Knobs). 5. Remove the Back Cover (Refer to Removing & Replacing the Back Cover).
MAXON SP-300 HAND HELD To replace the Main Board 1. Reverse the steps taken to remove the Main Board. 2. When installing the Main Board into the chassis insure that the LED light guide is aligned properly. 11 3. When installing the Main Board into the chassis, place 2 fingers over the black rubber control knob dust covers to insure that the dust covers do not get pushed out of the appropriate seating position.
MAXON SP-300 HAND HELD REMOVING & REPLACING THE DAUGHTER BOARDS The Daughter Boards are soldered into the Main Board Assy. 1. Remove the Main Board (Refer to Removing & Replacing the Main Board). 2. Unsolder the appropriate Daughter Board from the Main Board Assembly. To Replace a Daughter Board: 1. Ensure that the Main Board Assembly and Daughter Board are mechanically clean. 2. Insert the daughter board in the required position. 3. Ensure the Daughter Board is properly seated in the Main Board Assembly.
MAXON SP-300 HAND HELD 4. It may be necessary to remove excess solder using a vacuum de-soldering tool or Solder wick . Again, use great care when de-soldering or soldering on the printed circuit boards. It may also be necessary to remove the epoxy adhesive that was under the surface mount component and any flux on the printed circuit board. the Surface Mount Component Replacement procedures. it may not be necessary to “tin” all (or any) of the IC pins before the installation process.
MAXON SP-300 HAND HELD PROGRAMMING ALIGNMENT PROCEDURE The SP-300 Series portable radios require the ACC-2300 programming cable. With the 25 pin “D” type connector installed on the computer, take the other end of the programming cable and insert it in the receptacle located on the opposite side of the PTT on the radio. For further information, please refer to the ACC-904 Programming Manual.
MAXON SP-300 HAND HELD 15. Disconnect the test equipment. Should repairs be required, the following procedures should be applied: 1b. Switch to a channel with the same frequency and CTCSS of 250.3Hz. Push PTT and adjust RV401 to desired CTCSS tone deviation, same as above step. RX VCO 1. Set the unit to the highest receive frequency, 470 MHz(UHF), 174MHz(VHF) and adjust the VCO L303 to 10 volts. 1c. Switch between the 67Hz channel and the 250.
MAXON SP-300 HAND HELD TEST EQUIPMENT SETUP WATT METER 20dB AUDIO MODULATION- METER AUDIO GENERATOR RADIO OSCILLOSCOPE DC POWER SUPPLY SPECTRUM ANALYZER 154.625445681125661 FREQUENCY COUNTER VOLT METER SSG 3K Dev @ 1K (25 kHz Channel Spacing) 1.5K Dev @ 1K (12.5 kHz Channel Spacing) OSCILLOSCOPE RADIO DISTORTION METER DC POWER SUPPLY SINAD METER 1. S.S.G.
MAXON SP-300 HAND HELD ALIGNMENT POINTS DIAGRAM RV1 RV2 RV2 RV4 RV4 RV1 T1 RV3 T1 RV3 TCXO1 RV5 TC701 L203 RV401 RV402 L203 L303 RV401 TP1 RV403 RV402 L303 TP1 RV403 ALIGNMENT POINTS UHF WITH OUT TCXO MODULE ALIGNMENT POINTS VHF & UHF WITH TCXO MODULE Page -24May 2001
MAXON SP-300 HAND HELD TROUBLESHOOTING GUIDE SYMPTOMS Unit does not Work Warning Tone & No Work Defective RX Audio Bad RX Sensitivity (-10 to -60db) Defective RX PLL Error Low TX power Output No TX power No modulation No s.a.t.(tone) No programming CAUSES 1. Complete discharge of battery (7.5v+/-10%) 2. Fuse blown up (4a) 3. 5v voltage source 1. Low battery (lower than 5.6v) 2. Pll error 3. Filtering error 4 .EEPROM fail 1. No audio at speaker 2. Busy lamp (yellow Color) is o.k. but no Audio 1.
MAXON SP-300 HAND HELD VOLTAGE CHARTS CONTROL CIRCUIT RX REF # B C Q401 4.4 Q403 0.0 Q404 Q405 TX E B C E 0.0 5.0 0.3 5.0 5.0 4.6 GND 0.0 4.6 GND 5.0 2.2 2.0 0.0 7.0 0.0 5.0 1.8 1.7 5.0 1.8 1.7 Q406 4.0 0.0 5.0 2.0 5.0 5.0 Q407 0.0 4.5 GND 5.0 0.0 GND Q408 0.0 5.0 GND 2.0 0.0 GND Q410 4.3 0.0 5.0 4.3 0.0 5.0 GND Q411 0.0 - GND 0.0 0.0 Q412 0.0 7.5 7.5 0.0 7.5 7.5 Q413 7.5 0.0 GND 7.5 0.
MAXON SP-300 HAND HELD RECEIVE STATE PIN # IC1 IC2 IC3 IC5 IC6 IC401 IC402 1 GND 1.6 - 2 GND 5.0 - 4.0 1.4 0.0 0.0 3.5 GND 1.0 3 GND 5.0 0.0 - 4.0 0.0 1.3 AUDIO 4 5.0 5 GND 5.0 - 4.1 GND 0.0 0.0 5.0 - 3.8 AUDIO 0.0 6 7.5 5.0 0.0 - 3.8 7.5 0.0 0.0 7 0.0 - 3.8 4.0 0.0 0.0 8 0.0 - 4.2 1.5 2.0 0.0 9 5.0 AUDIO 0.0 4.0 10 2.6 0.8 4.0 0.0 11 2.6 1.0 4.0 0.0 12 5.0 0.0 5.0 0.0 13 3.0 4.0 0.0 0.0 14 5.0 GNS 5.0 5.
MAXON SP-300 HAND HELD TRANSMIT STATE PIN # IC1 IC2 IC3 IC5 IC6 IC401 IC402 1 GND 1.6M 0.0 2 GND 5.0 0.0 - 1.3 1.9 0.0 - GND 1.9 3 GND 5.0 0.0 0.0 - 0.0 1.9 0.0 4 5.0 5 GND 5.0 GND - GND 1.9 0.0 5.0 - - 1.5 0.0 6 7.5 0.0 0.0 - - 7.5 0.0 0.0 7 0.0 - - 7.5 0.0 GND 8 0.0 5.0 - 1.5 1.9 0.0 9 5.0 - 1.9 2.1 10 2.6 - 2.1 0.0 11 2.6 - 2.2 0.0 12 5.0 - 2.2 0.0 13 3.0 - 5.0 0.0 14 0.0 - 5.0 5.0 15 0.0 5.0 16 5.
MAXON SP-300 HAND HELD SP-300 SERIES UHF & VHF DIGITAL SECTION PARTS LIST REF# DESCRIPTION PART# DIGITAL SECTION VHF& UHF (COMMON PARTS) PTT SWITCH BOARD (SEE NOTE1) 650-180-0017 FUSE BOARD ASSY 650-200-0004 C136 C400 C404 C405 C406 C413 C414 C415 C416 C417 C418 C419 C420 C421 C422 C423 C424 C425 C426 C427 C428 C429 C430 C431 C432 C433 C434 C435 C436 C437 C438 C439 C441 C442 C443 C444 C446 C448 C449 C452 C453 C454 C455 C456 C458 C459 C460 C461 C462 C463 CAP,TA,100UF 293D107X0006E2T6V CAP,CER,0.
MAXON SP-300 HAND HELD REF# DESCRIPTION Q413 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND Q416 Q417 PART# REF# DESCRIPTION PART# 870-020-0001 R461 RES,TF,1M,5%,1/16W,+/-200,0603 741-102-1105 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010 R464 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004 R469 RES,TF,2.
MAXON SP-300 HAND HELD SP-300 SERIES VHF RF SECTION PARTS LIST REF # DESCRIPTION REPLACEMENT MODULES FRONT ENDASSY, VHF(SEE NOTE 1) VCOTX/RX ASSY, VHF (SEE NOTE 1) POWERAMPASSY, VHF(SEE NOTE 1) TCXO ASSY, VHF(SEE NOTE 1) PART # 650-110-0012 650-030-0021 650-230-0012 650-100-0002 COMPONENTS C1 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102 C2 CAP,TA,10UF,293D106X06R3A2T6.3V 102-013-0106 C3 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102 C4 CAP,CER,0.
MAXON SP-300 HAND HELD REF # C128 C129 C131 C132 C133 C134 C135 C136 C137 C145 C146 C901 C902 C903 C904 C905 C906 C907 C908 C910 C911 C999 CF1 CF2 CON701 D1 D5 D6 D8 D9 D11 D12 D13 D14 D15 D17 D18 D20 D901 D902 FUSE1 IC1 IC2 IC3 IC5 IC6 L1 L3 L4 L5 L6 L7 L8 L11 L13 L14 L15 L16 DESCRIPTION CAP,TA,10UF,20%,16V,3216 CAP,ELE,10UF,16V20%3X5 5.0PT CAP,CER,0.01UF,5%,50V,X7R,0603 CAP,TA,4.7UF,20V,3528:293D475X0020B2T20V CAP,TA,1.0UF,20%,16V,3216 CAP, CER,.
MAXON SP-300 HAND HELD REF # R31 R32 R33 R34 R36 R37 R41 R42 R43 R45 R46 R47 R48 R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R74 R75 R76 R77 R78 R79 R81 R82 R83 R84 R85 R86 R87 R88 R89 R91 R92 R93 R94 DESCRIPTION RES,TF,300,1/16W,5%,T 1608 RES,TF,300,1/16W,5%,T 1608 RES,TF,3.3K,5%,1/16W,+/-200,0603 RES,TF,18,1/16W, 5%,T 1608 RES,TF, 0,5%,1/16W, +/-200,0603 RES,TF,3.
MAXON SP-300 HAND HELD SP-300 SERIES UHF RF SECTION PARTS LIST REF # DESCRIPTION PART # REPLACEMENT MODULES FRONT ENDASSY, UHF (SEE NOTE 1) 650-110-0013 VCOTX/RX ASSY, UHF (SEE NOTE 1) 650-030-0020 POWERAMPASSY, UHF (SEE NOTE 1) 650-230-0013 COMPONENTS C1 CAP,CER,470PF,10%,50V,X7R,0603 C2 CAP,TA,10UF,293D106X06R3A2T6.
MAXON SP-300 HAND HELD REF # C127 C128 C129 C131 C132 C133 C134 C135 C136 C137 C145 C146 C901 C902 C903 C904 C905 C906 C907 C908 C910 C911 CF1 CF2 D1 D5 D6 D8 D9 D11 D12 D13 D14 D15 D17 D18 D20 D901 D902 IC1 IC2 IC5 L1 L2 L3 L4 L5 L6 L7 L8 L11 L12 L13 L14 DESCRIPTION CAP, CER, 0.01UF,5%,50V,X7R,0603 CAP, TA, 4.7UF,20%,10V,3216 CAP, ELE,10UF,16V 20% 3X5 5.0PT CAP, CER, 0.01UF,5%,50V,X7R,0603 CAP, TA,4.7UF,20V,3528:293D475X0020B2T 20V CAP,TA,1.0UF,20%,16V,3216 CAP, CER,.
MAXON SP-300 HAND HELD REF # R25 R26 R27 R28 R31 R32 R33 R34 R35 R37 R41 R42 R43 R45 R47 R48 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R74 R75 R76 R77 R78 R79 R81 R82 R83 R84 R85 R86 R87 R88 R89 R91 R92 DESCRIPTION RES,TF,4.7K,5%,1/16W,TC250,0603 RES,TF,18,1/16W, 5%,T 1608 RES,TF,4.7K,5%,1/16W,TC250,0603 RES,TF,220,1/16W,5%,T 1608 RES,TF,300,1/16W,5%,T 1608 RES,TF,300,1/16W,5%,T 1608 RES,TF,6.8K,5%,1/16W,+/-200,0603 RES,TF,18,1/16W, 5%,T 1608 RES,5.
MAXON SP-300 HAND HELD REF# TCXO TH1 U3 U6 U8 VR3 X1 XF1 DESCRIPTION TCXO, KXN1343A,12.8M,2.0PPM THERM,33K,NTCCS32163SH333KC IC, OP AMP,LM358M,SO-8,DUAL OP AMP IC, AUDIO AMP,LM386M-1,0.33W,SO-8 IC, OP AMP,LM358M,SO-8,DUAL OP AMP POT, 20K,RK0971111 20KA CRYSTAL, 44.645M -30 15PM,32P,RX 3RD,HC-45 FILTER, CRYSTAL,KFN1045AA(45.
MAXON SP-300 HAND HELD COMPONENT PINOUT BASE DIAGRAM MANUFACTURER'S PART NUMBER REFERENCE NO. 2SC5084 Q202,203,302,303,601 MMBR951 Q16,17,501,601 SCHEMATIC C B BFR92A Q12,16,25 KTC3875S (BL) Q6,11,13,14,21,26,27 E C C KTA1504SY B Q7,8,33 B E E KRC104S (ND) Q18,23,24,28,31,32,34,403, Q404,405,411,413 KRA104S (PD) Q5,410,412 KRA101S (PA) Q406,407 KRA110S (NK) Q2,3,4,401,416 C B B B 47K 47K E C 47K E C 47K 4.
MAXON SP-300 HAND HELD MANUFACTURER'S PART NUMBER BASE DIAGRAM REFERENCE NO. 5 8 1 ND433G 4 D9 SCHEMATIC 5 6 4 3 7 8 2 1 C 1.BASE 2 1 2.COLLECTOR 3 4 43 2 3 Q22 B 3.EMITTER E 1.EMITTER C 2.BASE 1 KTA1663 BLT50 3.EMITTER Q502 B E 4.
MAXON SP-300 HAND HELD BASE DIAGRAM PIN DESCRIPTION No Description RF Power Amp 5 2 3 7 6 1 Input 2 GND 3 Vcc (Pre Drive) 4 Vcc Control (Drive) 5 Vcc (Final) 6 Output 7 GND 1 Input 2 GND 4 B +(4V) 5 GND 6 Output 1 Gnd 9 Gnd 17 Gnd 2 RX Out 10 Gnd 18 Gnd 3 Gnd 11 Gnd 4 RX Vcc 12 Gnd 5 Gnd 13 TX Mod 6 TX Out 14 Gnd 7 Gnd 15 Tuning 8 TX Vcc 16 Gnd 4 1 (VHF) P.A. Assy. P/N: 650-230-0012 (UHF) P.A. Assy.
4 SCHEMATICS & BLOCK DIAGRAM 3 4 C605 0.001 6 C608 33pF C621 33P OUT C603 56pF L601 6T L602 6T C602 39pF R601 56K R602 6.8K R601 180 C601 680pF C604 100pF RX 5V C606 120pF R603 820 Q601 MMBR951 L603 6T C607 39pF R604 2.2 C611 100pF C612 47pF R605 3.3K C613 39pF L604 6T D601 KDS226 C616 9pF L605 6T C615 N/F C614 120pF L606 6T C617 47P L607 6T C615 7P C613 5.6P L604 4T C608 24P C610 33P R602 100 L606 4T 5 GND C623 39pF C623 22P L607 4T C620 N/F C614 3.
9 7 9 VCC 12 VCO TX 10 C212 0.001 L205 180nH R205 2.2K 8 R206 100 R202 100K MOD 13 C203 1.2P D201 1SV217 14 L201 100nH L203 4.5t R201 100K R203 4.7K C215 0.001 C201 470P VCC L305 100nH R305 2.2K C312 0.001 TUNING R304 2.2K R306 100 C308 2.2P C302 11P D301 1SV217 L303 4.5T C315 0.001 C206 5P C204 1.5P L202 470nH L204 820NH C211 7P R203 4.7K R207 270 5 TUNING R304 2.2K C308 4P C302 13P C317 4P Q303 2SC5084 (MCO) C313 3P C314 10P D301 1SV229 (T8) R303 4.
R706 47K TH703 150K TH701 10K 2 D702 MMBV109 D701 MMBV 105 R702 * R704 R710 2.2K R708 47K X701 12.8MHz LK701 * R705 47K R703 47K C702 100pF * TH702 33K C701 100pF TC701 20pF R714 2.2K CON1 C703 91pF R709 39K C704 180pF R711 4.7K R712 39K C401 47P - C706 220pF C403 47P C405 47P FUSE 4A CON1 D1 SW1 SW POLY Q702 MMBR9426 R715 2.2K 7.
AUDIO ALERT RX EN TX EN BUSY LOCK D/T PLL EN CLOCK DATA TCXO MOD REVISIONS PWR H/L 386 EN N/S SW P/S 5V VOLUME CHARGE SPK REV A 6.8K IC402D MC14066BD IC401A MC14066BD 5V 5V 1 4 1 2 1 3 RV401 47KB R486 * 18K 6 5 + C405 0.001 R493 22K 9 DATA R427 100K 3 7 R422 47K IC401B MC14066BD RV403 47KB 5 Q416 KRA110S (PK) C478 10/4 2 1 Q401 KRA110S (PK) IC404B KIA324F 7 C442 0.022(K) R402 8.2K C441 0.0018 R403 8.2K R404 R406 8.2K 8.2K C443 0.
12 7 R41 100 C53 1UF 13 C54 0.001 L4 100nH R43 10K C46 8P (VHF) P/N: 650-030-0021 11 MOD 6 Q16 MMBC1321 R26 18 C57 470P R27 4.7K P.A. MODULE(VHF) SCHEMATIC P/N: 650-030-0012 R32 300 3 TX 5V R25 3.3K + R24 5.6K C44 4.7/10(T) C61 470P VCO RX SECTION RV3 10K R46 2.2K C62 470P C63 C43 3P L1 47nH C42 0.001uF L2 0R 17 C35 0.001 R23 120 R22 4.7K R21 100 C38 43PF C36 14PF T3 C85 N/F C41 N/F C34 220P C903 0.01 C904 0.01 C910 0.01 R901 2.
12 Q14 KTC3875S(ALL) 7 VCO TX SECTION D20 KDS160 22 13 MOD OUT 6 R26 18 Q16 BFR92A (P2) C47 220P C45 220P R34 18 16 + R33 6.8K TX5V R45 22K 5 VCO RX SECTION C37 5.6P Q12 BFR92A (P2) 2 R21 33 L1 18NH R23 100 R22 4.7K L2 18NH MIXER T3 5 C903 0.01 D901 KDS226 C910 0.01 R901 2.2K Q901 KTC4075 Q903 KTC4075 D902 KDS226 C908 33P C902 0.01 R902 2.2K R903 4.7K Q902 KTA2014 C904 0.01 R904 7.5K R905 27K C905 18P R17 12K C16 2P R125 R130 100 22 20 19 18 17 C13 B+ 0.
REVISIONS REV A RELEASED DESCRIPTION TO MANUFACTURING CHG BY DGC DATE 03/01 P.A. MODULE TCXO IC2 PLL CIRCUIT TCXO (12.8MHz) TX VCO REF L.P.F.
PCB LAYOUTS LED1 CH404 C132 L13 D5 VR3 C75 R70 C701 L11 L16 RV2 C74 L17 C136 FON1 L8 C73 R93 RV4 L7 J3 T1 C76 VR1 IC5 RV3 CF1 L18 FRONT END MODULE Q22 X1 R53 R54 R65 C93 L15 C65 CF2 C87 T2 XF1 LK100 XF2 L14 TCXO1 C13 W1 T3 R125 C483 C484 D407 PA MODULE TCXO MODULE RX1 TX1 B+1 C19 C22 C23 C21 Q402 IC401 RV403 Q406 R421 R449 R429 C457 RV402 R450 R431 R495 R406 C404 R453 R407 R478 R479 R480 IC410 C470 IC408 C460 X401 R701 Board Layout (Top) Main Boar
Q'TY PART NO.