Motorola Gm328 Gm338 Gm398 Detailed 6804112j18 E Manual
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Troubleshooting Flow Chart for VCO3-5 4.0 Troubleshooting Flow Chart for VCO Are Q4332 Base at 0.7V Collector at 4.5V Emitter at 110mV Are Q4301 Base at 2.4V Collector at 4.5V Emitter at 1.7VAre U4301 Pins 13 at 4.4V 15 at 1.1V 10 at 4.5V 16 at 1.9V Low or no RF Signal at TP4003 Visual check of board OK? 35mV DC at U4301 Pin 19 NO YES Replace Q4301 at base of Q4332 NO NO NO NO YES YES YESYESLow or no RF Signal at input to PA 4.8V DC at U4301 Pin 19 Is RF available at C4402 YES YESYES YES NO NO NO...
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3-6Troubleshooting Flow Chart for VCO THIS PAGE INTENTIONALLY LEFT BLANK
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4-1 Section 4 UHF PCB/SCHEMATICS/PARTS LISTS 1.0 Allocation of Schematics and Circuit Boards 1.1 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 the UHF circuits only, refer to the Controller section for details of the related Controller circuits . The PCB component layouts and the Parts Lists in this Chapter show both the Controller and UHF circuit components. The UHF schematics...
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4-2Allocation of Schematics and Circuit Boards THIS PAGE INTENTIONALLY LEFT BLANK
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UHF 25-40W PCB / Schematics / Parts List 4-3 2.0 UHF 25-40W PCB / Schematics / Parts List 16 1 89U0251C0211 C0212 C0251 R0211 R0212 R0251 R0252R0257 C0252 R0253 C0262 8 71 14 U0211C0256 R0256 R0268 C0253 Q0110 R0102R0261 R0262C0261 R026918 1J0451 C0421 C0451 C0452 C0453 C0455 C0456 C0457 C0458 C0459 C0460 C0461 C0462 C0463 C0464 C0466 C0467 C0468R0441 C0441 C0442 C0443 C0445 C0446 C0447 C0448 C0449 C0470 C0471 C0472 C0473 C0474 C0476 C0477 C0478 C0490 C0221 C0222 C0225 C0241 C0243 R0220R0221 R0223 R0224...
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4-4UHF 25-40W PCB / Schematics / Parts List C3144C3146 C3147Q3141 R3134R3141 R3146R3147 R3154 R3113R3133C3151C3152 Q3152 R3151 R3152 R3153 Q3151 43 2 FL3111 FL3113 43 2 FL3115 C4263 D4261 R4261 TP4201TP4202 Y4261 2 34Y4262 C4261 C4262 R4241 R4262 1 372513 U4201C4201C4202 C4203 C4204 C4205 C4206C4208 C4209 C4211 C4287D4201R4201 R4206 C4207C4288 R4203 R4204 C4228 L4231 R4228C0485 4 3 2 Y3101 C3116 C3121C3122 C3123 D3101 L3112Q3102 R3112 R3114R3115 R3116R3118 C3104 C3110 C 3 111 C3112 C3113L 3 111 Q3101...
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UHF 25-40W PCB / Schematics / Parts List4-5 PASUPVLTG PASUPVLTG_UHF_PA_1PASUPVLTG NU NUNU NU NU NU R4633 C4632 30pF C4485 3000pF C4481 C4602 .033uF ALTL4402 5.6V VR447230pF C4484 .033uF C4421C4490 1000pF C4495C4489 C4436 10uF1000pF C4478 C4493 C4497 1000pF L4421 C4423 1uFC4422 100pF30pF C4482 100pF C4439L4436 0.1uF C4438 17nH L4437 9V3 100pF C4488C4486 30pF C4404 100pF 390nHL4403 9V3_UHF_PA_1 11.03nHL4401 C4418 0.1uF 3.9pF C4403 4 to 6 dBm C4407 0.1uF TXINJ R4405 200 TX_INJ_UHF_PA_1R4433 NUNU NUNU...
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4-6UHF 25-40W PCB / Schematics / Parts List C4262 220pF C4251 C4228 0.1uF C4252 R4221 1000pF 150 TP4202 1 C4253 4.7uFIN_5V_RF_REG TRB D4261 2.2uF C4213 R4241MODIN 220 C4221 .01uF C4227 LOCK_UHF_FN_1 100pF 100pF C4243U4507 C4202 .01uF BWSELECT 100pFVSF_UHF_FN_1 C4255 0.1uF C42092.2uF C4210 16_8MHz_UHF_FN_1C4204 5V_UHF_FN_1 100pF R4222 510 VCOMODC4246 100pF 100pF C4287 C4241CLK_UHF_FN_1 C4242VDDA 100pF C42230.1uF C4222 CSX_UHF_FN_1 C4207 C4289 0.1uF Vac VCTRL R4263C4244 47 R4204 CLKVSF 100pF 5V .01uF...
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UHF 25-40W PCB / Schematics / Parts List4-7 CR4302R4361 180 CR4301 0 R4315L4332 Vac GNDRXINJ VCOBIAS_2 100pF VCTRL_UHF_VCO C4312 12pFC4309 R4311390nH 7.5KVac L4361.022uFC4336 R4333 C4305 VacC4339 Vac CR4303R4302 10KR4346 10K 1pF C4321C4314 1.5pF5V_UHF_VCO C4318 0.22uF C4381 0.1uF1K R4343 C4323 Vac30 R4313R4344 10Q4332 0.1uF CR4311 100pFC4352 C4363 Vac C4301C4333 Vac C4372 Vac SH4301 SHIELD R4332 Vac 4.7uF C43250RXINJ_UHF_VCO 1P1 2 P2 3P3R4347 TXINJ_UHF_VCO L4312 RESONATORL4331 33nH L4301...
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4-8UHF 25-40W PCB / Schematics / Parts List GND 51 R4051 C4009 100pF33 R4008D4005 VacR4017 XFMR T4051 1 2 35 4 43pF C4004TBD L4004 IN NEG POS 39pF Q4001 Vac C4007270 R4011 C4024 1000pF 33pF C4002 100KNEG POS R4001TBD L4005 IN VacQ4002 FECTRL_1_UHF_FEQ4003 27nHL4053100K R4012 39pF C40033300pF TP4003IFC4013 470nHL4003 Vac 150nH L4051 3300pF R4015 C4011 3 5 4L4006 Vac XFMR T4052 1 21.8pFC4017 D4004 C4028 Vac R4060 330KC4026 1.8pF Vac22pF R4053C4019 R4020 Vac 15nHL405468 R4007 D4002 R4019 Vac 12pFC4018...