IC-910H Service manual.pdf - N3UJJ

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5-5 TRANSMITTER ADJUSTMENTSADJUSTMENTPA UNITPRESETTINGIDLINGCURRENT(for 144 M)(for 430 M)RF PEAK(for 430 M)(for 144 M)IF PEAKCARRIERSUPPRESSION1123412341123ADJUSTMENT CONDITION• Preset R131, R135, R150, R650 (PA unit) to max. counter clockwise.• Preset R3, R138, R503 (PA unit) to center position.• Preset C154, C659 (PA unit) to center position as illustration at right.• Display frequency:[EUR], [KOR] 145.0000 MHz[USA-1], [AUS] 146.0000 MHz• Mode: CW• Transmitting• Transmitting• Transmitting• Display frequency:[EUR], [KOR] 435.0000 MHz[USA-1], [AUS] 450.0000 MHz• Mode: CW• Transmitting• Display frequency: 440.0000 MHz• Connect an SSG to P1 on the PAunit via the JIG cable (A) and set as:Frequency : 10.850 MHzLevel : 18 mV* (–22 dBm)Modulation: OFF• Transmitting• Set an SSG as:Level : 0.79 µV* (–2 dBm)• Transmitting• Connect an SSG to P501 on the PAunit via the JIG cable (A) and set as:Frequency : 10.850 MHzLevel : 18 mV* (–22 dBm)Modulation: OFF• Display frequency: 146.0000 MHz• Set an SSG as:Level : 0.79 µV* (–2 dBm)• Transmitting• Display frequency: Any• Mode: USB• MIC gain : Center• Connect an audio generator to[MIC] connector and set as:Frequency : 1.5 kHzLevel : 2 mVrms• Transmitting• Display frequency: Any• Mode: USB• Mic gain : Minimum• Apply no audio signals to [MIC]connector.• Transmitting• Mode: LSB• Transmitting• Repeat step 1, step 2 several times.ADJUSTMENTMEASUREMENTVALUEPOINTUNIT LOCATION UNIT ADJUSTPARearpanelMAINMAINConnect an ammeter(3 A) between powersupply and the IC-910H.Connect an RFpower meter to [UHFANT] connector.Connect an RFpower meter to [VHFANT] connector.Connect an RF voltmeterto check pointJ51 via the JIG cable(B).Connect a spectrumanalyzer to checkpoint J51 via the JIGcable (B).At the point where theTX current increases0.5 A.At the point where theTX current increases1.0 A as step 1.At the point where theTX current increases0.5 A as step 2.At the point where theTX current increases1.0 A.Maximum outputpowerMaximum outputpowerMaximum levelMinimum carrier levelPAPAPAMAINMAINR131R135(R138)R650R150L1, L2C154Refer page 5-16 software adjustment 6.C659L2, L3R206,R2155 - 8From The N3UJJ.COM Document Library
• PA UNITP501RF peakpre-setting for 144 MR503PA unit pre-settingC659RF peak adjustmentfor 430MIdling currentadjustmentfor 144MR138R131R135R650C154L1L2R3PA unit pre-settingP1RF peakpre-setting for 430MR150Idling currentadjustmentfor 430MRF peakadjustmentfor 430M• MAIN UNITR206R215CarriersuppressionadjustmentL2L3IF peakadjustment5 - 9From 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 20 and 21: 5-2 PLL ADJUSTMENTSADJUSTMENT30.2 M
Page 22 and 23: 5-4 RECEIVER ADJUSTMENTSReceiver ad
Page 24 and 25: RECEIVER ADJUSTMENTS (continued)ADJ
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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IC-910H Service manual.pdf - N3UJJ

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