Icom IC-910H service manual Tantalum ECST1CC226R

Page 67

[MAIN UNIT] — UX-910

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

	C65	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C66	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C67	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C69	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C70	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C71	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C72	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C73	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C74	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C76	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C77	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C79	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C80	4030007170	S.CERAMIC	C1608	CH 1H 221J-T-A
	C81	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C82	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C83	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C84	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C85	4030010760	S.CERAMIC	C1608	CH 1H 331J-T-A
	C86	4030007080	S.CERAMIC	C1608	CH 1H 390J-T-A
	C87	4030007100	S.CERAMIC	C1608	CH 1H 560J-T-A
	C88	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C89	4030007150	S.CERAMIC	C1608	CH 1H 151J-T-A
	C90	4030007040	S.CERAMIC	C1608	CH 1H 180J-T-A
	C91	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C92	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C93	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C94	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C95	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C96	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C97	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C98	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C99	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C100	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C101	4030009350	S.CERAMIC	C1608	CH 1H 3R5B-T-A
	C102	4030009350	S.CERAMIC	C1608	CH 1H 3R5B-T-A
	C103	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C104	4030009540	S.CERAMIC	C1608	CH 1H 1R5B-T-A
	C105	4030009540	S.CERAMIC	C1608	CH 1H 1R5B-T-A
	C106	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C111	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C112	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C114	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C121	4030007000	S.CERAMIC	C1608	CH 1H 090D-T-A
	C122	4030009910	S.CERAMIC	C1608	CH 1H 040B-T-A
	C123	4030007040	S.CERAMIC	C1608	CH 1H 180J-T-A
	C124	4030011770	S.CERAMIC	C1608	CH 1H 060B-T-A
	C125	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C130	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C131	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C132	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C133	4030009520	S.CERAMIC	C1608	CH 1H 020B-T-A
	C134	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C135	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C136	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C137	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C138	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C140	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C141	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C142	4030009520	S.CERAMIC	C1608	CH 1H 020B-T-A
	C143	4030009510	S.CERAMIC	C1608	CH 1H 010B-T-A
	C144	4030009510	S.CERAMIC	C1608	CH 1H 010B-T-A
	C145	4030009520	S.CERAMIC	C1608	CH 1H 020B-T-A
	C146	4030009500	S.CERAMIC	C1608	CH 1H 0R5B-T-A
	C147	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C148	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C149	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C150	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C151	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C155	4030009560	S.CERAMIC	C1608	CH 1H R75B-T-A
	C160	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C161	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C162	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C163	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C164	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C165	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C166	4550006660	S.TANTALUM	ECST1CC226R
	C167	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C168	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C169	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C170	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C171	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C172	4510004630	S.ELECTROLYTIC	ECEV1CA100SR

[MAIN UNIT] — UX-910

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

	C173	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C174	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C175	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C176	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C177	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C181	4030009530	S.CERAMIC	C1608	CH 1H 030B-T-A
	C182	4030009500	S.CERAMIC	C1608	CH 1H 0R5B-T-A
	C183	4030009920	S.CERAMIC	C1608	CH 1H 050B-T-A
	C184	4030009510	S.CERAMIC	C1608	CH 1H 010B-T-A
	C185	4030009530	S.CERAMIC	C1608	CH 1H 030B-T-A
	C186	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C187	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C188	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C190	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C191	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C192	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C193	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C201	4030007020	S.CERAMIC	C1608	CH 1H 120J-T-A
	C202	4030006940	S.CERAMIC	C1608	CH 1H 030C-T-A
	C203	4030007050	S.CERAMIC	C1608	CH 1H 220J-T-A
	C204	4030009510	S.CERAMIC	C1608	CH 1H 010B-T-A
	C205	4030007030	S.CERAMIC	C1608	CH 1H 150J-T-A
	C206	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C207	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C208	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C209	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C210	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C211	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C212	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C213	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C221	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C222	4030007170	S.CERAMIC	C1608	CH 1H 221J-T-A
	C223	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C224	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C225	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C226	4030007130	S.CERAMIC	C1608	CH 1H 101J-T-A
	C227	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C228	4030007090	S.CERAMIC	C1608	CH 1H 470J-T-A
	C229	4030009910	S.CERAMIC	C1608	CH 1H 040B-T-A
	C230	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C232	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C240	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C241	4030009540	S.CERAMIC	C1608	CH 1H 1R5B-T-A
	C242	4030009350	S.CERAMIC	C1608	CH 1H 3R5B-T-A
	C243	4030009350	S.CERAMIC	C1608	CH 1H 3R5B-T-A
	C244	4030009540	S.CERAMIC	C1608	CH 1H 1R5B-T-A
	C245	4030007030	S.CERAMIC	C1608	CH 1H 150J-T-A
	C246	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C247	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C248	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C250	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C251	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C252	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C255	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C256	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C257	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N
	C258	4030007130	S.CERAMIC	C1608	CH 1H 101J-T-A
	C259	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C260	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C261	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C262	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C263	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C264	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C265	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C266	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C267	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C268	4030007010	S.CERAMIC	C1608	CH 1H 100D-T-A
	C271	4030009520	S.CERAMIC	C1608	CH 1H 020B-T-A
	C273	4030009550	S.CERAMIC	C1608	CH 1H 2R5B-T-A
	C274	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C275	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C276	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C277	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C278	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C279	4030009550	S.CERAMIC	C1608	CH 1H 2R5B-T-A
	C280	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C281	4030006880	S.CERAMIC	C1608	JB 1H 472K-T-A
	C282	4510004630	S.ELECTROLYTIC	ECEV1CA100SR
	C283	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C284	4030006850	S.CERAMIC	C1608	JB 1H 471K-T-A
	C285	4030006860	S.CERAMIC	C1608	JB 1H 102K-T-A
	C286	4030011600	S.CERAMIC	C1608	JB 1C 104KT-N

S.=Surface mount

6 - 28

Image 67

Contents Service Manual EUR IntroductionOrdering Parts Repair NotesTable of Contents General SpecificationsReceiver FM if IC SectionInside Views Main and PLL UnitsPA 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-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 7 1LO PLL Circuit PLL Circuits8 2LO PLL Circuit ‘ Connections Adjustment ProceduresPreparation Before Sarvicing Required Test EquipmentFrequency 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 HPF OFF DeviationLPF UX-910 Adjustments R13 CP321CP322 C332APC Power SETPre-setting for APC adjustment Front Unit Section Parts ListDisplay Board Resistor ERA3YED VR-A Board Func BoardVR-B 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

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.