Icom Ic-910h Vhf/Uhf All Mode Tranciever Service Manual
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![Page 24
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
RECEIVER ADJUSTMENTS (continued)
430 M PEAK
(MAIN BAND)
430 M PEAK
(SUB BAND)
430 M
TOTAL GAIN
(MAIN BAND)
NOISE
BLANKER
(MAIN BAND)
(SUB BAND)1
1
1
2
1
2
3
4• Display frequency: 435.0200 MHz
• Mode : FM
• Connect a standard signal generator
to [UHF ANT] connector and set as:
Frequency : 435.0200 MHz
Level : 1 µV* (–107 dBm)
Modulation :
1 kHz/±5.0 kHz Dev.
• Receiving
• Sub display freq. : 435.0200 MHz
• Mode...](http://img.usermanuals.tech/thumb/2452/82257/w64_icom_ic910-vhf-uhf-tranciever_service-manual_d-23.png "Page 24
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
RECEIVER ADJUSTMENTS (continued)
430 M PEAK
(MAIN BAND)
430 M PEAK
(SUB BAND)
430 M
TOTAL GAIN
(MAIN BAND)
NOISE
BLANKER
(MAIN BAND)
(SUB BAND)1
1
1
2
1
2
3
4• Display frequency: 435.0200 MHz
• Mode : FM
• Connect a standard signal generator
to [UHF ANT] connector and set as:
Frequency : 435.0200 MHz
Level : 1 µV* (–107 dBm)
Modulation :
1 kHz/±5.0 kHz Dev.
• Receiving
• Sub display freq. : 435.0200 MHz
• Mode...")
![Page 26
PA UNIT
PRESETTING
IDLING
CURRENT
(for 144 M)
(for 430 M)
RF PEAK
(for 430 M)
(for 144 M)
IF PEAK
CARRIER
SUPPRESSION
• 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.
5 - 8
5-5 TRANSMITTER ADJUSTMENTS
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT
VALUEPOINT
UNIT LOCATION UNIT ADJUST
1
1
2
3
4
1
2
3
4
1
1
2
3• Display frequency:
[EUR], [KOR] 145.0000...](http://img.usermanuals.tech/thumb/2452/82257/w64_icom_ic910-vhf-uhf-tranciever_service-manual_d-25.png "Page 26
PA UNIT
PRESETTING
IDLING
CURRENT
(for 144 M)
(for 430 M)
RF PEAK
(for 430 M)
(for 144 M)
IF PEAK
CARRIER
SUPPRESSION
• 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.
5 - 8
5-5 TRANSMITTER ADJUSTMENTS
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT
VALUEPOINT
UNIT LOCATION UNIT ADJUST
1
1
2
3
4
1
2
3
4
1
1
2
3• Display frequency:
[EUR], [KOR] 145.0000...")
5 - 3 X512 Reference frequency adjustment C402 430M lock voltage adjustment P251 144M LO level check point L193 144M lock voltage adjustment J541 30.2 MHz level check point CP300 430M lock voltage check point P421 430M LO level check point L551J51 CP51 FM TX-LO frequency check point J52 FM TX-LO frequency pre-setting CP100 144M lock voltage check point P551 Reference frequency check point L255 FM TX-LO frequency adjustment P701 Sub BFO level check point L552 Referemce level adjustment P601 Main BFO level check point R570 30.2 MHz level adjustment • PLL AND MAIN UNITS
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit. 5 - 4 5-4 RECEIVER ADJUSTMENTS Receiver 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. 144 M RECEIVER PEAK/GAIN 144 M PEAK (MAIN BAND) 144 M TOTAL GAIN (MAIN BAND) 144 M PEAK (SUB BAND) 144 M TOTAL GAIN (SUB BAND) ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT VALUEPOINT UNIT LOCATION UNIT ADJUST 1 2 1 2 1 2 1 2 1 2• Display frequency: Any • Disconnect P501 (PA unit) from J51 on the MAIN unit. • Connect a standard signal generator to [VHF ANT] connector and set as: Frequency : 146.0000 MHz Level : 7.1 mV* (–30 dBm) Modulation : OFF • Receiving • Receiving • Display frequency: 145.9800 MHz • Mode : FM • Connect an SSG to [VHF ANT] con- nector and set as: Frequency : 145.9800 MHz Level : 3.2 µV* (–97 dBm) Modulation : 1 kHz/±5.0 kHz Dev. • Receiving • Mode : USB • Set an SSG as : Frequency : 145.9815 MHz Level : 0.1 µV* (–127 dBm) Modulation : OFF • Receiving • Display frequency: 145.9800 MHz • Mode : USB • Set an SSG as : Frequency : 145.9815 MHz Level : 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] con- nector and set as: Frequency : 145.9800 MHz Level : 3.2 µV* (–97 dBm) Modulation : 1 kHz/±5.0 kHz Dev. • Receiving • Mode : USB • Set an SSG as : Frequency : 145.9815 MHz Level : 0.1 µV* (–127 dBm) Modulation : OFF • Receiving • Display frequency: 145.9800 MHz • Mode : USB • Set an SSG as : Frequency : 145.9815 MHz Level : 1 mV* (–47 dBm) Modulation : OFF • Receiving • Set an SSG as : Level : OFF • ReceivingPA Rear panel Rear panel Rear panel Rear panelConnect an RF volt- meter to check point P501 via the JIG cable (A). Connect an distortion meter to [EXT SP] connector with an 8 Ωload. Connect an AC milli- volt meter to [EXT SP] connector with an 8 Ωload. Connect an AC milli- volt meter to [EXT SP] connector with an 8 Ωload. Connect an distortion meter to [EXT SP] connector with an 8 Ωload. Connect an AC milli- volt meter to [EXT SP] connector with an 8 Ωload. Connect an AC milli- volt meter to [EXT SP] connector with an 8 Ωload.Maximum level –14 dBm Minimum audio distor- tion level Maximum noise output level 1.0 V (0 dB) 100 mV (20 dB of AF level difference as step 1.) Minimum audio distor- tion level Maximum noise output level 1.0 V (0 dB) 100 mV (20 dB of AF level difference as step 1.)PA MAIN Front panel MAIN MAIN Front panel MAINL521 R547 Adjust in sequence L51, L52 several times. L53, L352, L353, L354 main [AF] volume R360 Adjust in sequence L651, L652 several times. L653, L851, L852, L853 sub [AF] volume R857 After adjustment, connect P501 (PA unit) to J51 on the MAIN unit.
5 - 5 L521 144M receiver peak/gain adjustment P501 144M receiver peak/gain check point R547 L52 L51 144M peak adjustment for main bandL53 • PA UNIT • MAIN UNIT L353 L352L851 R857 144M peak adjustment for sub band 144M total gain adjustment for sub band J51 144M receiver peak/gain pre-setting L852 L853 L651 L652 L653 144M peak adjustment for main band L354 R360 144M total gain adjustment for main band
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit. RECEIVER ADJUSTMENTS (continued) 430 M PEAK (MAIN BAND) 430 M PEAK (SUB BAND) 430 M TOTAL GAIN (MAIN BAND) NOISE BLANKER (MAIN BAND) (SUB BAND)1 1 1 2 1 2 3 4• Display frequency: 435.0200 MHz • Mode : FM • Connect a standard signal generator to [UHF ANT] connector and set as: Frequency : 435.0200 MHz Level : 1 µV* (–107 dBm) Modulation : 1 kHz/±5.0 kHz Dev. • Receiving • Sub display freq. : 435.0200 MHz • Mode : FM • Set an SSG as : Frequency : 435.0200 MHz Level : 1 µV* (–107 dBm) Modulation : 1 kHz/±5.0 kHz Dev. • Receiving • Display frequency: 435.0200 MHz • Mode : USB • Set an SSG as : Frequency : 435.0215 MHz Level : 1 mV* (–47 dBm) Modulation : OFF • Receiving • Set an SSG as : Level : OFF • Receiving • Display frequency: 145.9800 MHz • Mode : USB • [NB] : OFF • Connect an SSG to [VHF ANT] con- nector and set as : Frequency : 145.98150 MHz Level : 5.6 µV* (–92 dBm) Modulation : OFF and apply following signal to [VHF ANT] connector. • Receiving • [NB] : ON • Set an SSG as : Level : 3.2 µV* (–97 dBm) • Receiving • Sub display freq. : 145.9800 MHz • Mode : USB • [NB] : OFF • Set an SSG as : Level : 5.6 µV* (–92 dBm) • Receiving • [NB] : ON • Set an SSG as : Level : 3.2 µV* (–97 dBm) • ReceivingMAIN MAIN Rear panel MAIN 100 msec. 1 msec. 5 - 6ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT VALUEPOINT UNIT LOCATION UNIT ADJUST Connect a digital multimeter or oscillo- scope to check point CP851. Connect a digital multimeter or oscillo- scope to check point CP852. Connect an AC milli- volt meter to [EXT SP] connector with an 8 Ωload. Connect an oscillo- scope to check point CP101. Connect an oscillo- scope to check point CP701.Maximum voltage Maximum voltage 1.0 V (0 dB) 100 mV (20 dB of AF level difference as step 1.) Maximum noise wave- form The noise must be blanked. Maximum noise wave- form The noise must be blanked.PA PA Front panel PA MAINL22, L23, L282, L283 L280, L281 main [AF] volume R61 L102, L103 Verify L703, L704 Verify
5 - 7 L283 L22 L23 430M peak adjustment for main bandL282 • PA UNIT • MAIN UNIT R61 430M total gain adjustment for main band CP701 Noise blanker check point for sub band Noise blanker adjustment for sub band L704 L703 430M peak adjustment for sub band L280 L281 CP851 430M peak check point for main band L102Noise blanker adjustment for main band CP101 Noise blanker check point for main band CP852 430M peak check point for sub band L103
PA UNIT PRESETTING IDLING CURRENT (for 144 M) (for 430 M) RF PEAK (for 430 M) (for 144 M) IF PEAK CARRIER SUPPRESSION • 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. 5 - 8 5-5 TRANSMITTER ADJUSTMENTS ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT VALUEPOINT UNIT LOCATION UNIT ADJUST 1 1 2 3 4 1 2 3 4 1 1 2 3• 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 PA unit via the JIG cable (A) and set as: Frequency : 10.850 MHz Level : 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 PA unit via the JIG cable (A) and set as: Frequency : 10.850 MHz Level : 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 kHz Level : 2 mVrms • Transmitting • Display frequency: Any • Mode : USB • Mic gain : Minimum • Apply no audio signals to [MIC] connector. • Transmitting • Mode : LSB • TransmittingPA Rear panel MAIN MAINConnect an ammeter (3 A) between power supply and the IC- 910H. Connect an RF power meter to [UHF ANT] connector. Connect an RF power meter to [VHF ANT] connector. Connect an RF volt- meter to check point J51 via the JIG cable (B). Connect a spectrum analyzer to check point J51 via the JIG cable (B).At the point where the TX current increases 0.5 A. At the point where the TX current increases 1.0 A as step 1. At the point where the TX current increases 0.5 A as step 2. At the point where the TX current increases 1.0 A. Maximum output power Maximum output power Maximum level Minimum carrier levelPA PA PA MAIN MAINR131 R135 (R138) R650 R150 L1, L2 C154 C659 L2, L3 R206, R215 • Repeat step 1, step 2 several times. Refer page 5-16 software adjustment 6.
5 - 9 Idling current adjustment for 144M R135 R131 R138 • PA UNIT • MAIN UNIT R3 PA unit pre-setting P1 RF peak pre-setting for 430M R150 Idling current adjustment for 430M IF peak adjustment L3 L2 Carrier suppression adjustment R215 R206 C154 RF peak adjustment for 430M L2 L1C659 RF peak adjustment for 430M R503 PA unit pre-setting P501 RF peak pre-setting for 144 M R650
5 - 10 IF TOTAL GAIN TOTAL GAIN (for 144 M) (for 430 M) Ic APC DRIVE LEVEL LO LEAK (for 144 M) TRANSMITTER ADJUSTMENTS (continued) ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT VALUEPOINT UNIT LOCATION UNIT ADJUST 1 1 2 3 1 2 1• Display frequency: Any • Mode : USB • MIC gain : Center • Disconnect P501 (PA unit) from J51 on the MAIN unit. • Connect an audio generator to [MIC] connector and set as: Frequency : 1.5 kHz Level : 2 mVrms • Transmitting • Display frequency: [EUR], [KOR] 145.0000 MHz [USA-1], [AUS] 146.0000 MHz • Mode : USB • RF power : Maximum • MIC gain : Center • Connect an audio generator to [MIC] connector and set as: Frequency : 1.5 kHz Level : 2 mVrms • Transmitting • Display frequency: [EUR], [KOR] 435.0000 MHz [USA-1], [AUS] 450.0000 MHz • Transmitting • Display frequency: 146.0000 MHz • Mode : USB • Connect CP1631 (MAIN unit) to GND. • RF power : Maximum • Mic gain : Center • Connect an audio generator to [MIC] connector and set as: Frequency : 1.5 kHz Level : 20 mVrms • Transmitting • Display frequency: 146.0000 MHz • Mode : USB • RF power : Maximum • Mic gain : Center • Disconnect P501 (PA unit) from J51 on the MAIN unit. • Connect an audio generator to [MIC] connector and set as: Frequency : 1.5 kHz Level : 20 mVrms • Transmitting • Mode : CW • CW paddle : OFF • Connect a keyer to the [KEY] jack. • Key down (transmitting) • Display frequency: [EUR], [KOR] 146.0000 MHz [USA-1], [AUS] 148.0000 MHz • Mode : USB • RF power : Minimum • MIC gain : Center • TransmittingMAIN Rear panel Rear panel MAIN Rear panelConnect an RF volt- meter to check point J51 via the JIG cable (B). Connect an RF power meter to [VHF ANT] connector. Connect an RF power meter to [UHF ANT] connector. Connect an ammeter (30A) between power supply and the IC- 910H. Connect an RF volt- meter to check point J51 via the JIG cable (B). Connect an RF power meter to [VHF ANT] connector.–22 dBm 50 W 37.5 W 23 A Read the RF voltmeter indication. Same level as step 1 Minimum output powerMAIN PA MAIN MAIN PAR3 R503 R3 R1613 Verify R202 R504 After adjustment, connect P501 (PA unit) to J51 on the MAIN. After adjustment, connect P501 (PA unit) to J51 on the MAIN. LO leak must be performed after software adjustment (7) “TX POWER/METER”. After adjustment, disconnect CP1631 (PA unit) from GND on the MAIN.
5 - 11 • PA UNIT • MAIN UNIT R3 Total gain adjustment for 430M IF total gain adjustment R3 IC APC adjustment IC APC pre-setting R1613 CP1613 Drive level adjustment R202 IF total gain /Drive level check point J51 R503 Total gain adjustment for 144M R504 LO leak adjustment for 144M P501 IF total gain /Drive level pre-setting
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit. 5 - 12 5-6 SOFTWARE ADJUSTMENT ENTERING SOFTWARE ADJUSTMENT ADJUSTMENT ITEM (0) VOLUME CENTER PLL UNLOCK ADJUSTMENT ITEM (1) TUNED BPF (for 144 M) (for 430 M) ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Enter software adjustment mode: 1Turn power OFF. 2Terminate the [REMOTE] jack with a 3.5(d) mm mini-plug. 3While pushing [RIT] and [SATELLITE] keys, turn power ON. • Push [0] to enter the volume center set- ting. • Set the [RIT] and [SHIFT] controls to cen- ter. • Wait for a while. • Push [1] to enter the receiver adjustment. • Connect a standard signal generator to [VHF ANT] connector and set as: Frequency : 136.02150 MHz Level : 50 µV* (–73 dBm) Modulation : OFF • Receiving • Set an SSG as : Frequency : 146.02150 MHz Level : 50 µV* (–73 dBm) • Receiving • Set an SSG as : Frequency : 146.02150 MHz Level : 50 µV* (–73 dBm) • Receiving • Set an SSG as : Frequency : 420.02150 MHz Level : 50 µV* (–73 dBm) • Receiving • Connect an SSG to [UHF ANT] connector and set as : Frequency : 440.02150 MHz Level : 50 µV (–73 dBm) • Receiving • Set an SSG as : Frequency : 479.98150 MHz Level : 50 µV* (–73 dBm) • Receiving 1 1 1 2 1 2 3 4 5 6The display shows the selection item scleenfor the adjustment mode, push [0]–[9] key to select adjustment item. Once enterring adjustment mode, use [UP]/[DOWN] key to skip/back items, or [ENT] to return the selection item screen. Push [RIT] key to set the volume center positions, and to step next. Verify the unlock detection for VHF by blinking the frequency on the dis- play, then push [RIT] key to step next. Verify the unlock detection for UHF by blinking the frequency on the dis- play, then push [RIT] key to exit vol- ume center setting to selection item screen. Push [RIT] key to tune the “144 tune 1”, and to step next. Push [RIT] key to tune the “144 tune 2”, and to step next. Push [RIT] key to tune the “144 tune 3”, and to step next. Push [RIT] key to tune the “430 tune 1”, and to step next. Push [RIT] key to tune the “430 tune 2”, and to step next. Push [RIT] key to tune the “430 tune 3”. Turn power OFF and ON to return the normal operation mode. Then start the receiver adjustments (page 5-3). USB USB USB USB USB USB USB USB USB USB USB USB USB USB USB USB CAUTION: NEVER select ajustment items [6]–[9] key on the selection item screenwhile transceiver is connected to an SSG. Because transceiver automatically transmits when transmit items [6]–[9] is selected.