Icom IC-910H R547, P501, L353, L354 R360, L352, L53 L52, L51 R857, L853 L852, L652 L651 J51

Page 23

•PA UNIT

144M receiver

R547

peak/gain

 

adjustment L521

P501

144M receiver peak/gain check point

•MAIN UNIT

144M peak

L353

 

 

 

 

 

 

 

 

adjustment

 

 

 

 

 

for main band

L354

 

 

 

 

 

 

 

 

R360

 

 

 

 

 

 

 

 

 

 

 

 

144M total gain

 

 

 

 

 

 

 

 

 

 

adjustment

 

 

 

 

 

for main band

 

 

 

 

 

144M peak

L352

 

 

 

 

 

 

 

 

 

 

 

 

 

adjustment

L53

 

 

 

L52

 

 

 

 

for main band

 

 

 

 

 

 

 

 

 

 

L51

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R857

144M total gain adjustment for sub band

L853

L852

L851 144M peak adjustment

L653 for sub band

L652

L651

J51

144M receiver peak/gain pre-setting

5 - 5

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Contents Service Manual EUR IntroductionOrdering Parts Repair NotesTable of Contents General SpecificationsReceiver FM if IC SectionInside Views Main and PLL UnitsPA Unit PLL IC TOP ViewBottom View UX-910 1200MHz Band Unit Disassembly and Option InstructionsOpening the transceiver’s case Main SUB Opening the PA unit coverFL-132/FL-133 CW Narrow Filter UT-106 DSP Unit Installing 1st DSP unit front panel sideInstalling 2nd DSP unit rear panel side UT-102 Voice Synthesizer UnitCR-293 High Stability Crystal Unit Receiver Circuit Circuit DescriptionSquelch Circuit Main Unit 6 10 MHz if Circuit Main UnitDemodulator Circuit Main Unit Squelch Control Circuit Main UnitMeter Circuit Main Unit Transmitter CircuitsNoise Blanker Circuit Main Unit AGC Circuit Main UnitRF Circuit PA Unit Transmit if Amplifier Circuit Main UnitModulation Circuit Main Unit CW Keying Circuit Main UnitPLL Circuits 8 2LO PLL Circuit PLL Circuits7 1LO PLL Circuit ‘ Connections Adjustment ProceduresPreparation Before Sarvicing Required Test Equipment Frequency Adjustment PLL AdjustmentsPLL and Main Units Receiver Adjustments L354 R360 R547P501 L353Main Band OFF EXTNoise BlankerCP852 L283L22 CP851Transmitter Adjustments R131 R503C659 R138LO Leak If TotalMain Gain GNDR1613 R504R202 CP1613Software Adjustment Meter Software AdjustmentNoise SQL Calibration FilterTX Power LPF DeviationHPF OFF UX-910 Adjustments R13 CP321CP322 C332APC Power SETPre-setting for APC adjustment Display Board Section Parts ListFront Unit Resistor ERA3YED VR-B Board Func BoardVR-A Board PLL Unit RIT BoardJack Board MIC BoardResistor ERA3YEB Thermistor Tantalum ECST1AD107R REG BA09T Main UnitDiode DAN222TL Resistor ERA3YKD R364 7030003320 R915 7030003520 Tantalum Temsva 1C 335M-8L Electrolytic ECEV1EA4R7SR Electrolytic Relay Diode HSU88TRF Coil Eljre 15NG-F Resistor ERJ1WYJ181U Resistor ERJ1TYJ102U JB 1H JB 1C Mica BARISTOR-C Board DRV BoardBARISTOR-A Board VARISTOR-B BoardMain Unit UX-910 2UX-910MAIN UnitResistor RGB3L R15 Resister ERA3YED Tantalum ECST1CC226R CH 1H Connectot 25FMN-BTK Chassis Parts Mechanical PartsDisplay Unit Cover PartsUX-910 Unpacking UnpackingUX-910 Chassis Parts UX-910 Main UnitTransistors and FET’S SEMI-CONDUCTOR InformationDTA114 EE TL MA29B DiodesSection Board Layouts Page Icom America Inc 13714HZ-C1
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