IC-910H Service manual.pdf - N3UJJ

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5-4 RECEIVER ADJUSTMENTSReceiver adjustments must be performed after software adjustment (0) and (1). SUB band must be OFF when adjusting MAIN band,or main AF volume (max.counter clockwise) and SQL volume (max. clockwise) must be set when adjusting SUB band.ADJUSTMENT144 MRECEIVERPEAK/GAIN144 M PEAK(MAIN BAND)144 MTOTAL GAIN(MAIN BAND)144 M PEAK(SUB BAND)144 MTOTAL GAIN(SUB BAND)1212121212ADJUSTMENT CONDITION• Display frequency: Any• Disconnect P501 (PA unit) from J51on the MAIN unit.• Connect a standard signal generatorto [VHF ANT] connector and set as:Frequency : 146.0000 MHzLevel : 7.1 mV* (–30 dBm)Modulation: OFF• Receiving• ReceivingAfter adjustment, connect P501 (PA unit) to J51 on the MAIN unit.• Display frequency: 145.9800 MHz• Mode: FM• Connect an SSG to [VHF ANT] connectorand set as:Frequency : 145.9800 MHzLevel : 3.2 µV* (–97 dBm)Modulation: 1 kHz/±5.0 kHz Dev.• Receiving• Mode: USB• Set an SSG as :Frequency : 145.9815 MHzLevel : 0.1 µV* (–127 dBm)Modulation: OFF• Receiving• Display frequency: 145.9800 MHz• Mode: USB• Set an SSG as :Frequency : 145.9815 MHzLevel : 1 mV* (–47 dBm)Modulation: OFF• Receiving• Set an SSG as :Level : OFF• Receiving• Sub display freq. : 145.9800 MHz• Mode: FM• Connect an SSG to [VHF ANT] connectorand set as:Frequency : 145.9800 MHzLevel : 3.2 µV* (–97 dBm)Modulation: 1 kHz/±5.0 kHz Dev.• Receiving• Mode: USB• Set an SSG as :Frequency : 145.9815 MHzLevel : 0.1 µV* (–127 dBm)Modulation: OFF• Receiving• Display frequency: 145.9800 MHz• Mode: USB• Set an SSG as :Frequency : 145.9815 MHzLevel : 1 mV* (–47 dBm)Modulation: OFF• Receiving• Set an SSG as :Level : OFF• Receiving*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.MEASUREMENTADJUSTMENTVALUEPOINTUNIT LOCATION UNIT ADJUSTPA Connect an RF voltmeterMaximum level PA L521to check pointP501 via the JIGcable (A).RearpanelRearpanelRearpanelRearpanelConnect an distortionmeter to [EXT SP]connector with an8 Ω load.Connect an AC millivoltmeter to [EXTSP] connector withan 8 Ω load.Connect an AC millivoltmeter to [EXTSP] connector withan 8 Ω load.Connect an distortionmeter to [EXT SP]connector with an8 Ω load.Connect an AC millivoltmeter to [EXTSP] connector withan 8 Ω load.Connect an AC millivoltmeter to [EXTSP] connector withan 8 Ω load.–14 dBmMinimum audio distortionlevelMaximum noise outputlevel1.0 V (0 dB)100 mV (20 dB of AFlevel difference as step1.)Minimum audio distortionlevelMaximum noise outputlevel1.0 V (0 dB)100 mV (20 dB of AFlevel difference as step1.)5 - 4From The <strong>N3UJJ</strong>.COM Document LibraryMAINFrontpanelMAINMAINFrontpanelMAINR547Adjust insequenceL51, L52severaltimes.L53, L352,L353, L354main [AF]volumeR360Adjust insequenceL651, L652severaltimes.L653, L851,L852, L853sub [AF]volumeR857
• PA UNIT144M receiverpeak/gainadjustmentR547L521P501144M receiver peak/gaincheck point• MAIN UNIT144M peakadjustmentfor main bandR360144M total gainadjustmentfor main band144M peakadjustmentfor main bandL353L354L352L53L52L51R857144M total gainadjustmentfor sub bandL853L852L851L653L652L651144M peakadjustmentfor sub bandJ51144M receiverpeak/gainpre-setting5 - 5From The <strong>N3UJJ</strong>.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 20 and 21: 5-2 PLL ADJUSTMENTSADJUSTMENT30.2 M
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 56 and 57: [PA UNIT]REFNO.ORDERNO.DESCRIPTIONI
Page 58 and 59: [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.
Page 70 and 71: SECTION 7MECHANICAL PARTS[FRONT UNI
Page 72 and 73:
MP34 (CH)MP34 (CH)MP12 (CH)MP1851 (
Page 74 and 75:
SECTION 8SEMI-CONDUCTOR INFORMATION
Page 76 and 77:
• DIODES1SS301 1SS355 1SS375-TL 1
Page 78 and 79:
• BOTTOM VIEW (RIT BOARD)• BOTT
Page 80 and 81:
• BOTTOM VIEW (VARISTOR-A BOARD)
Page 82 and 83:
• BOTTOM VIEW (DISPLAY BOARD)J10
Page 84 and 85:
• BOTTOM VIEW (PA UNIT)64133 416F
Page 86 and 87:
• BOTTOM VIEW (PLL UNIT)R341MP11F
Page 88 and 89:
6105171• BOTTOM VIEW (MAIN UNIT)6
Page 90 and 91:
• BOTTOM VIEW (UX-910 MAIN UNIT)0
Page 92 and 93:
10-2 PA AND PLL UNITStoMAINUNITGHVR
Page 94 and 95:
11 - 1SECTION 11WIRING DIAGRAM1 2 J
Page 96 and 97:
12-2 PLL UNITto DISPLAYboard J9CP7L
Page 98 and 99:
12-4 PA UNIT (2)toUX-910W305P1to MA
Page 100 and 101:
12-6 MAIN UNIT (2)12-7 MAIN UNIT (3
Page 102 and 103:
12 - 812-9 UX-910 MAIN UNIT (2)CHAS
Page 104:
lcom Inc.1-1-32, Kamiminami, Hirano
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