Icom IC-910H service manual Tantalum ECST1AD107R

Page 46

[PLL UNIT]

	REF	ORDER	DESCRIPTION
	NO.	NO.	DESCRIPTION
	NO.	NO.

	C192	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C193	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C194	4030006910	S.CERAMIC	C1608	CH 1H 0R5C-T-A
	C196	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C198	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C213	4030007060	S.CERAMIC	C1608	CH 1H 270J-T-A
	C214	4030009920	S.CERAMIC	C1608	CH 1H 050B-T-A
	C215	4030007070	S.CERAMIC	C1608	CH 1H 330J-T-A
	C216	4030009520	S.CERAMIC	C1608	CH 1H 020B-T-A
	C217	4030007040	S.CERAMIC	C1608	CH 1H 180J-T-A
	C229	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C251	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C253	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C254	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C261	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C262	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C263	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C273	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C274	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C275	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C276	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C277	4030006980	S.CERAMIC	C1608	CH 1H 070D-T-A
	C278	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C279	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C280	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C281	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C283	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C284	4030007050	S.CERAMIC	C1608	CH 1H 220J-T-A
	C301	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C302	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C303	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C304	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C306	4030007120	S.CERAMIC	C1608	CH 1H 820J-T-A
	C308	4030007110	S.CERAMIC	C1608	CH 1H 680J-T-A
	C310	4030007100	S.CERAMIC	C1608	CH 1H 560J-T-A
	C312	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C314	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C321	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C322	4030012600	S.CERAMIC	C2012	JB 1A 105M-T-A
	C323	4030007050	S.CERAMIC	C1608	CH 1H 220J-T-A
	C325	4030007020	S.CERAMIC	C1608	CH 1H 120J-T-A
	C327	4550006670	S.TANTALUM	ECST1AD107R
	C329	4550006670	S.TANTALUM	ECST1AD107R
	C330	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C331	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C332	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C333	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C334	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C335	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C336	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C337	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C339	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C340	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C341	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C342	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C343	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C344	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C345	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C347	4550006700	S.TANTALUM	ECST1AY106R
	C348	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C350	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C362	4550006170	S.TANTALUM	ECST1AY225R
	C363	4550006170	S.TANTALUM	ECST1AY225R
	C364	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C365	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C366	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C368	4550006150	S.TANTALUM	ECST1CY105R
	C369	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C370	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C371	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C372	4030007130	S.CERAMIC	C1608	CH 1H 101J-T-A
	C373	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C374	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C375	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C376	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C377	4510004440	S.ELECTROLYTIC	ECEV1HA010SR
	C381	4510005370	S.ELECTROLYTIC	ECEV1AA221P
	C382	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C383	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C391	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C392	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C393	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A

[PLL UNIT]

	REF	ORDER	DESCRIPTION
	NO.	NO.	DESCRIPTION
	NO.	NO.

	C394	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C398	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C399	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C401	4030011340	S.CERAMIC	C1608	CH 1H 471J-T-A
	C402	4610001920	S.TRIMMER	TZC03Z060A110 6P
	C403	4030006950	S.CERAMIC	C1608	CH 1H 040C-T-A
	C404	4030006950	S.CERAMIC	C1608	CH 1H 040C-T-A
	C405	4030009500	S.CERAMIC	C1608	CH 1H 0R5B-T-A
	C407	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C408	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C410	4030011340	S.CERAMIC	C1608	CH 1H 471J-T-A
	C413	4030006960	S.CERAMIC	C1608	CH 1H 050C-T-A
	C421	4030006980	S.CERAMIC	C1608	CH 1H 070D-T-A
	C422	4030006930	S.CERAMIC	C1608	CH 1H 020C-T-A
	C423	4030006980	S.CERAMIC	C1608	CH 1H 070D-T-A
	C426	4030006960	S.CERAMIC	C1608	CH 1H 050C-T-A
	C428	4030006980	S.CERAMIC	C1608	CH 1H 070D-T-A
	C430	4030006960	S.CERAMIC	C1608	CH 1H 050C-T-A
	C471	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C472	4030012600	S.CERAMIC	C2012	JB 1A 105M-T-A
	C474	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C475	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C476	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C478	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C480	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C481	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C482	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C483	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C484	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C485	4030006920	S.CERAMIC	C1608	CH 1H 010C-T-A
	C487	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C488	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C501	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C502	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C503	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C504	4030008920	S.CERAMIC	C1608	JB 1C 473K-T-A
	C505	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C511	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C512	4510006220	S.ELECTROLYTIC	ECEV1CA101UP
	C513	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C514	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C515	4030006980	S.CERAMIC	C1608	CH 1H 070D-T-A
	C535	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C541	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C542	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C543	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C544	4030007030	S.CERAMIC	C1608	CH 1H 150J-T-A
	C545	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C551	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C552	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C553	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C554	4030007050	S.CERAMIC	C1608	CH 1H 220J-T-A
	C555	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C556	4030006920	S.CERAMIC	C1608	CH 1H 010C-T-A
	C557	4030007050	S.CERAMIC	C1608	CH 1H 220J-T-A
	C558	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C559	4030007110	S.CERAMIC	C1608	CH 1H 680J-T-A
	C560	4030007110	S.CERAMIC	C1608	CH 1H 680J-T-A
	C574	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C575	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C601	4030007170	S.CERAMIC	C1608	CH 1H 221J-T-A
	C602	4030007100	S.CERAMIC	C1608	CH 1H 560J-T-A
	C603	4030011330	S.CERAMIC	C1608	CH 1H 391J-T-A
	C604	4030007160	S.CERAMIC	C1608	CH 1H 181J-T-A
	C605	4030007160	S.CERAMIC	C1608	CH 1H 181J-T-A
	C608	4030007110	S.CERAMIC	C1608	CH 1H 680J-T-A
	C609	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C610	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C611	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C613	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C614	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C615	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C616	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C617	4030006900	S.CERAMIC	C1608	JB 1E 103K-T-A
	C618	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C619	4550006700	S.TANTALUM	ECST1AY106R
	C620	4030007130	S.CERAMIC	C1608	CH 1H 101J-T-A
	C621	4030007130	S.CERAMIC	C1608	CH 1H 101J-T-A
	C701	4030007170	S.CERAMIC	C1608	CH 1H 221J-T-A
	C702	4030007100	S.CERAMIC	C1608	CH 1H 560J-T-A
	C703	4030011330	S.CERAMIC	C1608	CH 1H 391J-T-A
	C704	4030007160	S.CERAMIC	C1608	CH 1H 181J-T-A

S.=Surface mount

6 - 7

Image 46

Contents Service Manual Repair Notes IntroductionOrdering Parts EURTable of Contents Specifications GeneralReceiver Main and PLL Units SectionInside Views FM if ICPA Unit Bottom View TOP ViewPLL IC Opening the transceiver’s case Disassembly and Option InstructionsUX-910 1200MHz Band Unit FL-132/FL-133 CW Narrow Filter Opening the PA unit coverMain SUB UT-102 Voice Synthesizer Unit Installing 1st DSP unit front panel sideInstalling 2nd DSP unit rear panel side UT-106 DSP UnitCR-293 High Stability Crystal Unit Circuit Description Receiver CircuitSquelch Control Circuit Main Unit 6 10 MHz if Circuit Main UnitDemodulator Circuit Main Unit Squelch Circuit Main UnitAGC Circuit Main Unit Transmitter CircuitsNoise Blanker Circuit Main Unit Meter Circuit Main UnitCW Keying Circuit Main Unit Transmit if Amplifier Circuit Main UnitModulation Circuit Main Unit RF Circuit PA UnitPLL Circuits 7 1LO PLL Circuit PLL Circuits8 2LO PLL Circuit Required Test Equipment Adjustment ProceduresPreparation Before Sarvicing ‘ ConnectionsPLL Adjustments Frequency AdjustmentPLL and Main Units Receiver Adjustments L353 R547P501 L354 R360Blanker EXTNoise Main Band OFFCP851 L283L22 CP852Transmitter Adjustments R138 R503C659 R131GND If TotalMain Gain LO LeakCP1613 R504R202 R1613Software Adjustment Software Adjustment MeterNoise SQL Filter CalibrationTX Power HPF OFF DeviationLPF UX-910 Adjustments C332 CP321CP322 R13Power SET APCPre-setting for APC adjustment Front Unit Section Parts ListDisplay Board Resistor ERA3YED VR-A Board Func BoardVR-B Board MIC Board RIT BoardJack Board PLL UnitResistor ERA3YEB Thermistor Tantalum ECST1AD107R Main Unit REG BA09TDiode 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 VARISTOR-B Board DRV BoardBARISTOR-A Board BARISTOR-C Board2UX-910MAIN Unit Main Unit UX-910Resistor RGB3L R15 Resister ERA3YED Tantalum ECST1CC226R CH 1H Connectot 25FMN-BTK Cover Parts Mechanical PartsDisplay Unit Chassis PartsUX-910 Main Unit UnpackingUX-910 Chassis Parts UX-910 UnpackingSEMI-CONDUCTOR Information Transistors and FET’SDTA114 EE TL Diodes MA29BSection Board Layouts Page Icom America Inc 13714HZ-C1

IC-910H specifications

The Icom IC-910H is a highly regarded and versatile transceiver that is designed for amateur radio operators who are particularly interested in V/UHF and microwave communications. Known for its exceptional performance, the IC-910H encompasses a suite of features that make it a standout choice for both casual and dedicated hams.

One of the main features of the IC-910H is its dual-band capability, allowing for simultaneous operation on both 144 MHz (2 meters) and 430 MHz (70 centimeters) bands. This dual operation enables users to engage in various communication modes, including SSB, CW, FM, and digital. Its high frequency stability ensures that users can rely on the transceiver for accurate and consistent transmissions.

The IC-910H is equipped with a high-performance 10 MHz IF filter that improves selectivity and reduces adjacent channel interference. The optional 1.2 GHz module enhances the transceiver’s capabilities, allowing operators to venture into microwave frequencies. This expandability is a significant advantage for users who wish to progress in their amateur radio pursuits.

Another notable aspect of the IC-910H is its large, easy-to-read LCD display, which features various color options for enhanced visibility. The front panel layout is user-friendly, providing quick access to important controls and functions. The built-in DSP (Digital Signal Processing) technology offers noise reduction and filtering capabilities, significantly improving overall audio quality and making weak signals more intelligible.

The transceiver also includes extensive memory functions, with up to 1,000 memory channels available for storing frequencies, modes, and operational settings. Additionally, it supports CTCSS and DCS tones, which facilitate the use of repeater systems and private group communications.

In terms of build quality, the IC-910H features a robust construction designed for durability and long-term use. Its efficient power supply management ensures excellent performance while minimizing heat generation, making it suitable for extended operating sessions.

Overall, the Icom IC-910H is a powerful and feature-rich transceiver that is favored by many amateur radio enthusiasts. With its versatile operating modes, advanced filtering capabilities, and clear display, it stands out as a reliable tool for both casual operators and serious DXers. Its well-thought-out design and comprehensive features make it a valuable addition to any ham's station collection.