Motorola Vhf 136 174 Mhz Uhf 435 480 Mhz 6881096c38 Manual
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6881096C38March, 2006 VHF (136-174 MHz) Band Information: Block Diagrams 7-11 7.4.4 Transmitter Figure 7-5. 7.4.5 Receiver Figure 7-6. ANTTo Receiver TX +B +B TX 5V DAC TX Hamonics Filter C440-445,L415,416 Matching Network C446-448,451,452 L418,419 Power Control Q419 ANT Switch Q409,410 Buffer AMP Q414Coupler R445Pre Driver Q413P in VCOFinal AMP Q411PA Q412 DAC RX DAC RX From VCOFrom ANT Switch 2-Pole Band Pass Filter Q4012-Pole Band Pass Filter Q4052-Pole Crystal Filter F402 2nd Local 44.654MHz X5016 Pole Ceramic Filter F5016 Pole Ceramic Filter F502 Mixer Q407RF AMP Q404 Local Buffer Q416 IF AMP Q408IF IC Q506 (2nd Mix,2nd Local,IF AMP,DISC,Noise AMP)
March, 20066881096C38 7-12VHF (136-174 MHz) Band Information: Troubleshooting Charts 7.5 Troubleshooting Charts Figure 7-7. Troubleshooting Flow Chart for Receiver Sta rt Very low or no 12 dB SINAD Noise at spkr when radio is unsqu’d? Is 1st LO at C431 >2 dBm? Inject on channel signal at RF port, C429 Inject a 45.1 MHz signal at R467 SINAD 1Check IFIC Q506 (see below) Noise at pin 9 of IFIC Q506? Check VCO/Synth Inject on channel signal at C402 Check harmonic filter and antenna path Check external components connected to IFIC. If OK, replace Q506 Check mixer, Q407Is 12 dB SINAD dBm? Check IFIC RF Front & RearCheck +5VRX and Q404 bias circuitry 1 Is 2nd LO on freq? Check VDC of all IFIC pins Are VDC of pin 1(4.79V), 2(4.17V) and 4(4.88V) of IFIC OK? Are voltages on pins OK?Check 2nd LO XTAL and components Check IFIC (see below) Check external components connected to IFICNO NO YES YES NOYES YES NO YESYESNO YES NO YESYESNO YES YES NO NONO NO 2 pole filters Check XTAL filter F402, L411 -116 Is 12 dB -110 dBm? SINAD Is 12 dB -115 dBm? SINAD Is 12 dB -105 dBm? Is Q404 biased properly? Inject 45.1 MHz signal at R413, L411
6881096C38March, 2006 VHF (136-174 MHz) Band Information: Troubleshooting Charts 7-13 Figure 7-8. Troubleshooting Flow Chart for Transmitter Sta rt No Power Is +5VTX and TXB+ OK? Is current OK? Is DAC TX High or Low? Is Pin OK? Check Q201, Q202, Q206 & Q209 Check Voltages in Power Control Circuit Check Voltages in PA L i n e - u pTroubleshoot VCO Done Power OK? 1. Check Pin Diodes 2. Check Harmonic Fil- Inspect/Repair TX Output Network NO NO LOW HIGH YES NO NO YESYESYES Check Pin to Q419 Pin 1 Is
March, 20066881096C38 7-14VHF (136-174 MHz) Band Information: Troubleshooting Charts Figure 7-9. Is information from mP Q101 correct? Is Q330 correc- tor AT4.65 VDC? Is Q314 Emitter AT=13VDC Is Q310 Pin 2 4.3 VDC in TX? Troubleshooting Flow Chart for Synthesizer Sta rt Visual check of the Board OK?Correct Problem Check 5V Regulator +5VQ323 at Pins 3, 4Is 14.4MHz Signal at Q323 Pin 1?Check X301,C337,C3 38,C336 Are signals at Pins 8 of Q323 ? Check Q301, L303,C303,R301, C304 & R302 Fix Connection Is Connection between Q310 Pin 2 & CN701 Pin 35 OK? Replace Replace Q201 Replace or resolder necessary components Is RF level at Q324 between -10 & +5 dBm? Are Q308, L301 C308, C310, C309 Replace Q308 See VCO Troubleshooting Chart Are Waveforms at Pins 8 of Q323 Do Pins 9,10 & 11 of Q323 toggle Check programming Replace Check µP Q101 Trouble- shooting Chart NO YES NO NO NO NO YESYES NO YES YES NOYESNO YES YES YESNO NO NO YES NO YES YES NO Check R358, C312 C313 YES Is 14.4MHz Signal at Q323 Pin 1?
6881096C38March, 2006 VHF (136-174 MHz) Band Information: Troubleshooting Charts 7-15 Figure 7-10. Troubleshooting Flow Chart for Microcontroller START APPLY POWER TO RADIO AND WAS GOOD OR BAD POWER-ON YES DONE WAS GOOD POWER-ON BEEP ARE ALERT TONES ENABLED IN SPM USE SPM TO ENABLE TONES INVOKE FACTORY RESET IN SPM WAS GOOD POWER ON BEEP PRESENT MAIN RADIO BOARDS MUST BE REPLACED ARE TONES PRESENT ON POWER UP AT CN101 PIN 3? AUDIO PROBLEM, TROUBLE- SHOOT AUDIO CKT WITH POWER CONNECTED TO RADIO AND THE RADIO TURNED ON CHECK THE FOLLOWING: 1) 5V AT PIN 87 OF Q101. IF NONE CHECK Q126. 2) WITH HIGH IMPEDANCE PROBE CHECK FOR 8.388608MHZ AT PIN 13 AND 12 OF Q101, IF NO SIGNAL CHECK/REPLACE X101. 3) CHECK DC AT PIN 9 OF Q121. IF < 4.5VDC CHECK CN101 PIN 15. 4) CHECK FOR TYPICAL VOLTAGES OF Q101 AND Q114 VOLTAGES. BEEP PRESENTTURN ON PRESENT DONE DONE DONE YES YES YES YES YES NO/DON’T KNOWNO NO NO NO (RF & CONTROLLER) NOTE: Q101 is not replaceable. If Q101 is damaged, the controller and RF boards both need to be replaced.
March, 20066881096C38 7-16VHF (136-174 MHz) Band Information: Troubleshooting Charts Figure 7-11. Make sure Synthesizer is working correctly. 1.6 VDC at Q308 Base? 4.65 VDC at Q414 collector? =151 mVrms at Terminal of C311? Supply DC at Q329? 0.9 VDC at Q308 emitter? Are Q325Pin’s emitter at 2.1VDC, collector at 3.8VDC, base at 2.9VDC? Q324 emitter at 1.0VDC, collector at 4.0VDC, base at 1.7VDC ? 0.9 VDC at Q308 emitter ? 1.6 VDC at Q308 base ? 4.65 VDC at Q416 collector? Troubleshooting Flow Chart for VCO Low or no Power at Pin 4 of L408 VisualCheck of Board OK? If all parts from Q324 of mixer are OK, then replace Q324 If all parts associated with those Pin’s are OK, then replace Q308 If all parts from Q325 Pin 4 to Input of PA are OK, then replace Q325 If C359 is OK, then replace Q329 Replace R347 Replace C311 Low or no power at Input to PA Visual check of Board OK?Correct Problem Replace R311, R322 Replace R312 or L301 NO YES NO YES NO YES NO YES NO YESYES NO YES NOYES NONOYES NO NO YES NO YES RX VCOTX VCO Power OK but no Modulation Note: Test Frequency 158MHz
VHF 136-174 MHz Circuit Board/Schematic Diagrams and Parts List7-176881096C38March, 20067.6 VHF 136-174 MHz Circuit Board/Schematic Diagrams and Parts List Figure 7-12. VHF 136-174 MHz Controller Board (K305E501-01) Top Side Bottom Side Chapter 7
7-18 VHF 136-174 MHz Circuit Board/Schematic Diagrams and Parts ListMarch, 20066881096C38Figure 7-13. VHF 136-174 MHz Complete Controller Board Schematic Diagram (K305E501-01) R1200 Q1 1 5HL002-Y11 R109330 R108 330 A0 1 A12 A23 Vss4 SDA 5 SCL6 TEST7 Vcc 8 Q114 S-24C16AFJ-01 R127 12.4k R1286.98KC129 0.01 R11051KR11151K R11213K R11322K R11443K R115130K R11618KR117 33KR118 100K C131 33p C132 33p 4 OUT11 OUT22INGND3 AB 4 OUT11IN UP DOWN CD COM01 COM12 COM23 COM34 SEG05 SEG16 SEG27 SEG38 SEG49 SEG510 SEG611 SEG712 SEG813 SEG914 SEG1015 SEG1116 SEG1217 SEG1318 SEG1419 SEG1520 SEG1621 SEG1722 SEG1823 SEG1924 SEG2025 SEG2126 SEG2227 SEG2328 SEG2429 SEG2530 SEG2631 SEG2732 SEG2833 SEG2934 SEG3035 SEG3136 LC101 LCD V3 77S4776 S4675V2 78 V179 COM080 COM181 COM282 COM383 P3084 P3185 VSS386 VDD387 P3288 P3389 P3490 P3591 P0092 P0193 P0294 P0395 P0496 P0597 P0698 P0799 P10100 P111 P122 P133 P144 P155 P166 P177 RES#8 XT19 XT210 VSS111 CF112 CF213 VDD114 P8015 P8116 P8217 P8318 P8419 P8520 P86 21 P8722 P7023 P7124 P7225P73 26 S027 S128 S229 S330 S431 S532 S633 S734 S835 S936 S1037 S1138 S1239 S1340 S1441 S1542 S1643 S1744 S1845 S1946 S2047 S2148 S2249 S2350 VDD251 VSS252 S2453 S2554 S2655 S2756 S2857 S2958 S3059 S3160 S3261 S3362 S3463 S3564 S3665 S3766 S3867 S3968 S4069 S4170 S4271 S4372 S4473 S4574 Q101 LC87F72C8A(flash)/LC877264(mask ) C1120.1 C108 0.1 C1050.1 C110 0.001 X101 CSA-308 (8.388608MHz) C10310p C102Not use C10122p BUSY TX PTT SW C1130.001 MO N I SW C1070.01 C140 0.22 C1390.1 C138 0.1 C137 0.1 TX D RXD C1410.001 C142 0.001 C143 0.001 C144 0.001 31 4 25Q125 NJM2107F(w/vox )R153 10K( w/vox) R15447K(w/vox) R15647K(w/vox) VDDVbb Vdd Vdd GND MOD_COP DATA0 MIC GND GND GND RESETGND GND CLOCKDATA PLL_LE UNL OCK DTMF OUT DTMF IN SU AU OUTDETECT IN TDC N/W RSSI SQL IN VOX IN TEMP INMC1 MC2 RX/TXSAVE TX_M UTEST_BY SQL_MUTE DAC_RX DAC_TX DAC_BAISPRO MIC_PTT C1560.01 C157 0.01 C158 47p C159 47p C160 47p C161 0.001C162 0.001 C164 0.001(V)0.01(22/U ) C1650.001 C166 47p C167 47p C145 47p C146 0.001 C147 0.001 C148 0.001 C149 0.001 C150 0.001 C151 0.001 C152 0.001C153 0.001 C154 0.001 C155 0.001 R150 10k(V)2.2k(22/U ) R15 8470K OUT 1 Vdd2 GND3 NC 4 CD5 Q105 RN5VD30CATRC1090.1 R1 7 047KR17147K R172 47K R101 0 R168 47KR173 4.7k R174 24.7k R162 10KR159 20K R16110K R1 6 310KR165 10KR166 10K R164 10KR148 20K R14720K R14520K R14620K R14420K R14320K R14220K R14120K R160 10K R169330 R167 47K COM0 COM1 COM2 COM3 S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 COM0 COM1 COM2 COM3 S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 Q119UMH6N R1291K Q1271SS355R102 47K S101EVQPUA02K S102EVQPUA02K M101 OB - 22P44 C104100p C1200.001 Q1 1 8 SML-020ML T 12345678 9101112131416 15 Q121MB88347PFV R10747 SH101 SOLDER SHORT R175 4.7K Q116 123456789101112131415161718192021222324252627282930313233343536373839 40 CN101 AXK5S4 0245J/PR176 47K C173 Not us e Q126RB521S R177 2.2k(V ) C1710.1 C1352.2u/6.3V C136Not Use R180 560k(V)10k (U) R1820 Q102 UMG2N R18347K C10627p L112LEM2520T100J R1190 R121 NOT US E R12610K R138 100K(w/vox) R137 1K ( w/v ox) TP111 TP112 TP113 TP114 TP115TP 116 TP110 R106 0+C11447u/6.3V (T) +C11547u/6.3V (T) +C11647u/6.3V (T) +C11147u/6.3V (T) R10510K R103 NOT US E R1040 Q130SSM3K03FE C1741u/6.3V C176 0.1uF (U)R184 10k(Ver 9) Q1311SS372(W /V OX) C181 0.22(W /V OX)C183 470p (W/VOX) C182 0.22(W/VOX) R157220K(w/vox) R192 47KR192 47K COM1COM2 R187 220K Q133 DAN222Q134 2SC4116GRR188 56KR189 120K R190 180K Q135 DAN222R191 10K Q138 1SS355 Q137 UMW1N Q136 1SS355 C185 4.7uC184 4.7u HL002-Y11 Q117 DTC114EE 4 OUT11 IN 3 OUT22 GND 3 OUT22 GND 4 OUT11 OUT22IN GND3 4 OUT11 OUT22IN GND3 4 OUT11 OUT22IN GND3 C186 0.22u/10(V) Not use(U) 6 4 132 Q123 DTA144EE (w/vox)
VHF 136-174 MHz Circuit Board/Schematic Diagrams and Parts List7-196881096C38March, 2006 Figure 7-14. VHF 136-174 MHz Main Board Top Side (K305E502-01)
7-20 VHF 136-174 MHz Circuit Board/Schematic Diagrams and Parts ListMarch, 20066881096C38Figure 7-15. VHF 136-174 MHz Main Board Bottom Side (K305E502-01)