Motorola Radius Cm200 Cm300 Pm400 Detailed 6881098c00 A Manual
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Troubleshooting Flow Chart for Synthesizer3-7 3.0 Troubleshooting Flow Chart for Synthesizer 5V at pin 6 of D200 Is information from mP U403 correct ? Is U200 Pin 47 at = 13VDC ? Is U201 Pin 19 4.5 VDC in TX? (at VCO section) ? Sta rt Visual check of the Board OK?Correct Problem Check 5V Regulator U503 +5V at U200 Pin’s 13 & 30 ? Is 16.8MHz Signal at U200 Pin 19 ? Check Y201 and associated Parts Are signals at Pin’s 14 &15 of U200 ? Check R228Check R201 Is U200 Pin 2 >4.5 VDC in Tx &
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3-8TROUBLESHOOTING CHARTS 4.0 Troubleshooting Flow Chart for VCO Are Q200 Base at 2.4V Collector at 4.5V Emitter at 1.7V Are U201 Pins 13 at 4.4V 15 at 1.1V 10 at 4.5V 16 at 1.9V Low or no RF Signal at TP1 Visual check of board OK? 35mV DC at U201 Pin 19 NO YES at base of Q200 NO NO NO YES YESYESLow or no RF Signal at input to PA 4.8V DC at U201 Pin 19 Is RF available at C2060 YES YESYES YES NO NO NO NO NO Audio =180mVRMSat “-” Side of 4.5VDC at D205 If R211 and R12 are OK, then replace D205 Replace...
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Troubleshooting Flow Chart for DC Supply (1 of 2) 3-9 5.0 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. If that voltage is...
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3-10TROUBLESHOOTING CHARTS 5.1 Troubleshooting Flow Chart for DC Supply (2 of 2) Check VDC on C5007 V=3.3V ?Check Voltage on C5041NoGo to Digital SectionYe s 9v
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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. The UHF and Controller schematics and the related PCB and parts...
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4-2UHF2 PCB/ SCHEMATICS/ PARTS LISTS Notes
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UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics4-32.0 UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics 9V COMP_B+ DET_VFWD FILT_SW_B+ INTEGRATORPA_BIAS PWR_SETRX RX_EN TX_ENTX_INJ SHEET 1 OF 8 73D02968C74-O 9V COMP_B+ DET_VFWD FILT_SW_B+ INTEGRATORPA_BIAS PWR_SET RX RX_EN TX_EN TX_INJ MAIN COMPARTMENT UHF2 Interconnection between Main Board and Power Amplifier Compartment
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4-4UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics SHOWN FROM SIDE 18488978U01_P9 C301 C302 C303 C304 C305 C306 C307C308 C309 C310 C311 C312C313 C314 C315 C316C317 C318 C319 C320 C322 C336 C337 C359C360 C361C362 C364 C365 C369 C371 C402 C406C411 C414 C418 C490 C602 C603C604 C605C606 C607 C608 C609C610C611 C612 C613C614 C615 C616 C617 C618C619 C620 C621C622 C623 C624C625 C626 C627 C628C629 C630 C631C632C633 C662 C678 C1001 C1004 C1005 C1006C1007C1008 C1009 C1010 C1011C1012 C1013C1014 C1016 C1020...
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UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics4-5 C300 C321C323 C324 C325 C326C327 C328 C329C330 C331 C332 C333 C334 C335 C338 C339C340 C341 C342C343 C344C345 C346 C347 C348 C349 C350 C351 C353 C354 C355C356 C357 C358C366 C367 C368 C370 C400C401C403 C404 C405 C407 C408 C410C412 C413 C415 C416 C417 C421 C422C423 C1000 C1002 C1027 C1028 C1029C1032 C1035 C1036C1040 C1043 C1045 C1046C1047 C1050C1051C1053 C1054 C1059C1060 C1061 C1062 C1066 C1067 C1070 C1071 C1072 C1073 C1075 C1076 C1077 C1078 C1079...
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4-6UHF 1-25 W Band 2 PCB 8488978U01 (rev. P9) / Schematics Accessory Connector Control Head Connector NC Place capacitors near J2Place capacitors near J2 Place capacitors near J2 Place capacitors near J2ELP ONLY NC ELP ONLY NCELP ONLY NCELP ONLY Internal spkr+ jumper DNP J3 - DNP DNPDNP DIGITAL Option Board Keypad/DisplayAccessory Connector EXT_ALARM_OUT EXT_MIC_PTT PROG_IN PROG_I/O PROG_I/O PROG_I/O TO DC & AUDIOTO SHEET 1 220 TX AUDIO SEND DETECTOR AUDIO SENDTX AUDIO RETURN UNMUTED RX AUDIO SEND...