IC-910H Service manual.pdf - N3UJJ
IC-910H Service manual.pdf - N3UJJ IC-910H Service manual.pdf - N3UJJ
5-2 PLL ADJUSTMENTSADJUSTMENT30.2 MHzLEVELREFERENCEFREQUENCY144M LOCKVOLTAGE440M LOCKVOLTAGEMAIN BFOLEVELSUB BFOLEVEL11212312312ADJUSTMENT CONDITION• Display frequency: Any• Receiving• Display frequency: Any• ReceivingThis adjustment must be performedat 5 minutes later after power ON.• Display frequency: 173.9800 MHz• Mode: USB• Receiving• Display frequency: 136.0200 MHz• Receiving• Display frequency: 155.0000 MHz• Receiving• Display frequency: 479.9800 MHz• Mode: USB• Receiving• Display frequency: 420.0200 MHz• Receiving• Display frequency: 450.0000 MHz• Receiving• Display frequency: Any• Mode:USB• Receiving• Sub display freq. : Any• Mode:USB• ReceivingADJUSTMENTMEASUREMENTVALUEPOINTUNIT LOCATION UNIT ADJUSTPLLPLLPLLPLLPLLPLLConnect an RF voltmeteror spectramanalyzer to checkpoint J541.Connect an RF voltmeteror spectramanalyzer to checkpoint P551.Connect a frequencycounter to checkpoint P551.Connect a digitalmultimeter or oscilloscopeto check pointCP100.Connect an RF voltmeterto check pointP251.Connect a digitalmultimeter or oscilloscopeto check pointCP300.Connect an RF voltmeterto check pointP421.Connect an RF voltmeterto check pointP601.Connect an RF voltmeterto check pointP701.–10 dBm (or more than–11.5 dBm, when R570is in maximum position.)Maximum level(–13 dBm to –7dBm)60.400000 MHz2.7 V0.6 V to 1.6 V–10 dBm to –4 dBm3.4 V0.5 V to 1.5 V–16 dBm to –10 dBm–11 dBm to –5 dBm–11 dBm to –5 dBmPLLPLLPLLPLLPLLPLLR570Adjust insequenceL551, L552severaltimes.The trimmercapacitor ofX512.L193VerifyVerifyC402VerifyVerifyVerifyVerify5-3 FREQUENCY ADJUSTMENTADJUSTMENTFM TX-LOFREQUENCYADJUSTMENT CONDITION1 • Display frequency: AnyMAIN Connect a frequency• Mode: FMcounter to check• Disconnect P501, P502 (PA unit)point CP51.from J51 and J52 on the MAIN unit.• Apply no audio signals to [MIC]connector.• TransmittingAfter adjustment, connect P501, P502 (PA unit) to J51, J52 on the MAIN.ADJUSTMENTMEASUREMENTVALUEPOINTUNIT LOCATION UNIT ADJUST10.85000 MHz MAIN L2555 - 2From The N3UJJ.COM Document Library
• PLL AND MAIN UNITSR57030.2 MHz leveladjustmentL193144M lock voltageadjustmentP251144M LO levelcheck pointX512Reference frequencyadjustmentJ54130.2 MHz levelcheck pointC402430M lock voltageadjustmentCP300430M lock voltagecheck pointP421430M LO levelcheck pointReferemce leveladjustmentL551L552P701Sub BFO levelcheck pointCP100144M lock voltagecheck pointP551Reference frequencycheck pointL255FM TX-LOfrequencyadjustmentJ51 FM TX-LOJ52frequencypre-settingCP51FM TX-LOfrequencycheck pointP601Main BFO levelcheck point5 - 3From The N3UJJ.COM Document Library
- Page 1 and 2: SERVICEMANUALVHF/UHF ALL MODE TRANS
- Page 3 and 4: TABLE OF CONTENTSSECTION 1SPECIFICA
- Page 5 and 6: ■ RECEIVER• Receive system :VHF
- Page 7 and 8: • PA UNITTX/RX switching relay(RL
- Page 9 and 10: SECTION 3DISASSEMBLY AND OPTION INS
- Page 11 and 12: • UT-102 VOICE SYNTHESIZER UNITq
- Page 14 and 15: 4-1-6 10 MHz IF CIRCUIT (MAIN UNIT)
- Page 16 and 17: While in SSB mode, the amplified si
- Page 18 and 19: The passed signals are then applied
- Page 22 and 23: 5-4 RECEIVER ADJUSTMENTSReceiver ad
- Page 24 and 25: RECEIVER ADJUSTMENTS (continued)ADJ
- Page 26 and 27: 5-5 TRANSMITTER ADJUSTMENTSADJUSTME
- Page 28 and 29: TRANSMITTER ADJUSTMENTS (continued)
- Page 30 and 31: 5-6 SOFTWARE ADJUSTMENTADJUSTMENT A
- Page 32 and 33: SOFTWARE ADJUSTMENT (continued)ADJU
- Page 34 and 35: SOFTWARE ADJUSTMENT (continued)ADJU
- Page 36 and 37: 5-7 UX-910 ADJUSTMENTSADJUSTMENT2ND
- Page 38 and 39: UX-910 ADJUSTMENTS (continued)ADJUS
- Page 40 and 41: SECTION 6PARTS LIST6-1 IC-910[FRONT
- Page 42 and 43: [DISPLAY BOARD]REFNO.ORDERNO.DESCRI
- Page 44 and 45: [PLL UNIT]REF ORDERNO. NO.DESCRIPTI
- Page 46 and 47: [PLL UNIT]REF ORDERNO. NO.DESCRIPTI
- Page 48 and 49: [MAIN UNIT]REF ORDERNO. NO.DESCRIPT
- Page 50 and 51: [MAIN UNIT]REF ORDERNO. NO.DESCRIPT
- Page 52 and 53: [MAIN UNIT]REF ORDERNO. NO.DESCRIPT
- Page 54 and 55: [MAIN UNIT]REF ORDERNO. NO.DESCRIPT
- Page 56 and 57: [PA UNIT]REFNO.ORDERNO.DESCRIPTIONI
- Page 58 and 59: [PA UNIT]REF ORDERNO. NO.DESCRIPTIO
- Page 60 and 61: [PA UNIT]REF ORDERNO. NO.DESCRIPTIO
- Page 62 and 63: [PA UNIT]REF ORDERNO. NO.DESCRIPTIO
- Page 64 and 65: 6-2 UX-910[MAIN UNIT]REFNO.ORDERNO.
- Page 66 and 67: [MAIN UNIT] — UX-910REF ORDERNO.
- Page 68 and 69: [MAIN UNIT] — UX-910REF ORDERNO.
• PLL AND MAIN UNITSR57030.2 MHz leveladjustmentL193144M lock voltageadjustmentP251144M LO levelcheck pointX512Reference frequencyadjustmentJ54130.2 MHz levelcheck pointC402430M lock voltageadjustmentCP300430M lock voltagecheck pointP421430M LO levelcheck pointReferemce leveladjustmentL551L552P701Sub BFO levelcheck pointCP100144M lock voltagecheck pointP551Reference frequencycheck pointL255FM TX-LOfrequencyadjustmentJ51 FM TX-LOJ52frequencypre-settingCP51FM TX-LOfrequencycheck pointP601Main BFO levelcheck point5 - 3From The <strong>N3UJJ</strong>.COM Document Library
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