Manuals / Icom / Marine Equipment / Marine Radio

Icom IC-T90A manual Trimmer

Models: IC-T90A

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Page 38

[LOGIC UNIT]

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

R139	7030005530	S.RESISTOR	ERJ2GEJ 100 X (10 Ω )
R140	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R141	7030007340	S.RESISTOR	ERJ2GEJ 153 X (15 kΩ )
R142	7030005830	S.RESISTOR	RR0510R-223-D (22 kΩ )
R143	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R144	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R145	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R146	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R147	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R148	7030008270	S.RESISTOR	RR0510R-104-D (100 kΩ )
R149	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R151	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R152	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R153	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R154	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R203	7030000240	S.RESISTOR	MCR10EZHJ 68 Ω (680)
R204	7030000240	S.RESISTOR	MCR10EZHJ 68 Ω (680)
R205	7030000240	S.RESISTOR	MCR10EZHJ 68 Ω (680)
R207	7030005160	S.RESISTOR	ERJ2GEJ 105 X (1 MΩ )
R208	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R209	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R210	7030008010	S.RESISTOR	ERJ2GEJ 123 X (12 kΩ )
R211	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R241	7030005230	S.RESISTOR	ERJ2GEJ 334 X (330 kΩ )
R243	7030005080	S.RESISTOR	ERJ2GEJ 823 X (82 kΩ )
R244	7030005080	S.RESISTOR	ERJ2GEJ 823 X (82 kΩ )
R245	7030005080	S.RESISTOR	ERJ2GEJ 823 X (82 kΩ )
R246	7030005070	S.RESISTOR	ERJ2GEJ 683 X (68 kΩ )
R247	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R248	7030005160	S.RESISTOR	ERJ2GEJ 105 X (1 MΩ )
R249	7030005100	S.RESISTOR	ERJ2GEJ 154 X (150 kΩ )
R301	7030009290	S.RESISTOR	ERJ2GEJ 562 X (5.6 kΩ )
R302	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R305	7030005290	S.RESISTOR	ERJ2GEJ 682 X (6.8 kΩ )
R306	7030007290	S.RESISTOR	ERJ2GEJ 222 X (2.2 kΩ )
R307	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R308	7030005110	S.RESISTOR	ERJ2GEJ 224 X (220 kΩ )
R309	7030005720	S.RESISTOR	ERJ2GEJ 563 X (56 kΩ )
R310	7030008051	S.RESISTOR	ERA3YKD 184V (180 kΩ )
R311	7030007300	S.RESISTOR	ERJ2GEJ 332 X (3.3 kΩ )
R312	7030005710	S.RESISTOR	ERJ2GEJ 121 X (120 Ω )
R313	7030007300	S.RESISTOR	ERJ2GEJ 332 X (3.3 kΩ )
R314	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R315	7030005461	S.RESISTOR	ERA3YKD 204V (200 kΩ )
R316	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R317	7030005110	S.RESISTOR	ERJ2GEJ 224 X (220 kΩ )
R318	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R319	7030007290	S.RESISTOR	ERJ2GEJ 222 X (2.2 kΩ )
R320	7030005060	S.RESISTOR	ERJ2GEJ 333 X (33 kΩ )
R321	7030007340	S.RESISTOR	ERJ2GEJ 153 X (15 kΩ )
R324	7030009290	S.RESISTOR	ERJ2GEJ 562 X (5.6 kΩ )
R325	7310004660	S.TRIMMER	EVM-2WSX80 B54 (503)
R326	7310004660	S.TRIMMER	EVM-2WSX80 B54 (503)
R328	7030005170	S.RESISTOR	ERJ2GEJ 474 X (470 kΩ )
R329	7030005170	S.RESISTOR	ERJ2GEJ 474 X (470 kΩ )
R330	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R331	7030005210	S.RESISTOR	ERJ2GEJ 822 X (8.2 kΩ )
R332	7030005080	S.RESISTOR	ERJ2GEJ 823 X (82 kΩ )
R333	7030005830	S.RESISTOR	RR0510R-223-D (22 kΩ )
R335	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R336	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R340	7030005070	S.RESISTOR	ERJ2GEJ 683 X (68 kΩ )
R360	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R361	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R363	7030005530	S.RESISTOR	ERJ2GEJ 100 X (10 Ω )
R364	7030005310	S.RESISTOR	ERJ2GEJ 124 X (120 kΩ )
R365	7310004660	S.TRIMMER	EVM-2WSX80 B54 (503)
R366	7310004660	S.TRIMMER	EVM-2WSX80 B54 (503)
R367	7030005170	S.RESISTOR	ERJ2GEJ 474 X (470 kΩ )
R368	7030005170	S.RESISTOR	ERJ2GEJ 474 X (470 kΩ )
R400	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R451	7030008300	S.RESISTOR	ERJ2GEJ 184 X (180 kΩ )
R452	7030005600	S.RESISTOR	ERJ2GEJ 273 X (27 kΩ )
R453	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R454	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R455	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R456	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R457	7030005110	S.RESISTOR	ERJ2GEJ 224 X (220 kΩ )
R458	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R459	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R460	7030007290	S.RESISTOR	ERJ2GEJ 222 X (2.2 kΩ )

[LOGIC UNIT]

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

C3	4030017640	S.CERAMIC	ECJ0EC1H150J
C4	4030017390	S.CERAMIC	ECJ0EC1H180J
C5	4030017460	S.CERAMIC	ECJ0EB1E102K
C7	4030017460	S.CERAMIC	ECJ0EB1E102K
C8	4030017330	S.CERAMIC	ECJ0EF1C104Z
C9	4030017460	S.CERAMIC	ECJ0EB1E102K
C10	4030016790	S.CERAMIC	ECJ0EB1C103K
C11	4030016790	S.CERAMIC	ECJ0EB1C103K
C12	4030016790	S.CERAMIC	ECJ0EB1C103K
C13	4030017460	S.CERAMIC	ECJ0EB1E102K
C14	4550006780	S.TANTALUM	TEMSVB2 0J 476M-8R
C15	4030017440	S.CERAMIC	ECJ0EC1H221J
C16	4030017780	S.CERAMIC	ECJ0EB1E472K
C17	4030017760	S.CERAMIC	ECJ0EB1H222K
C20	4030017400	S.CERAMIC	ECJ0EC1H220J
C23	4030017500	S.CERAMIC	ECJ0EC1H560J
C24	4030017420	S.CERAMIC	ECJ0EC1H470J
C25	4030017460	S.CERAMIC	ECJ0EB1E102K
C26	4030017460	S.CERAMIC	ECJ0EB1E102K
C27	4030017420	S.CERAMIC	ECJ0EC1H470J
C29	4030017420	S.CERAMIC	ECJ0EC1H470J
C30	4030017420	S.CERAMIC	ECJ0EC1H470J
C32	4030017460	S.CERAMIC	ECJ0EB1E102K
C33	4030017420	S.CERAMIC	ECJ0EC1H470J
C34	4030017460	S.CERAMIC	ECJ0EB1E102K
C35	4030017420	S.CERAMIC	ECJ0EC1H470J
C36	4030017420	S.CERAMIC	ECJ0EC1H470J
C37	4030017420	S.CERAMIC	ECJ0EC1H470J
C38	4030016790	S.CERAMIC	ECJ0EB1C103K
C39	4030017420	S.CERAMIC	ECJ0EC1H470J
C40	4030017390	S.CERAMIC	ECJ0EC1H180J
C41	4030017460	S.CERAMIC	ECJ0EB1E102K
C43	4030017460	S.CERAMIC	ECJ0EB1E102K
C44	4030017460	S.CERAMIC	ECJ0EB1E102K
C45	4030017460	S.CERAMIC	ECJ0EB1E102K
C46	4030017460	S.CERAMIC	ECJ0EB1E102K
C47	4030017460	S.CERAMIC	ECJ0EB1E102K
C55	4030017460	S.CERAMIC	ECJ0EB1E102K
C57	4030017460	S.CERAMIC	ECJ0EB1E102K
C75	4550002980	S.TANTALUM	TEMSVA 1C 225M-8L
C76	4030017460	S.CERAMIC	ECJ0EB1E102K
C80	4550006960	S.TANTALUM	TEMSVB2 0G 107M8R
C81	4030017460	S.CERAMIC	ECJ0EB1E102K
C88	4030017510	S.CERAMIC	ECJ0EC1H680J
C89	4030017460	S.CERAMIC	ECJ0EB1E102K
C90	4030017460	S.CERAMIC	ECJ0EB1E102K
C91	4030017460	S.CERAMIC	ECJ0EB1E102K
C92	4030017460	S.CERAMIC	ECJ0EB1E102K
C93	4030017460	S.CERAMIC	ECJ0EB1E102K
C94	4030017330	S.CERAMIC	ECJ0EF1C104Z
C95	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C96	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C97	4550006640	S.TANTALUM	ECST1DY225R
C98	4030017330	S.CERAMIC	ECJ0EF1C104Z
C99	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C101	4030017460	S.CERAMIC	ECJ0EB1E102K
C102	4030017460	S.CERAMIC	ECJ0EB1E102K
C103	4030017460	S.CERAMIC	ECJ0EB1E102K
C138	4030017260	S.CERAMIC	C2012 JB 0J 475KT
C139	4030017460	S.CERAMIC	ECJ0EB1E102K
C140	4030017330	S.CERAMIC	ECJ0EF1C104Z
C141	4030017460	S.CERAMIC	ECJ0EB1E102K
C142	4550006780	S.TANTALUM	TEMSVB2 0J 476M-8R
C143	4030017460	S.CERAMIC	ECJ0EB1E102K
C145	4030017330	S.CERAMIC	ECJ0EF1C104Z
C146	4030017330	S.CERAMIC	ECJ0EF1C104Z
C147	4550006730	S.TANTALUM	TEMSVB2 0J 226M-8L
C148	4030017460	S.CERAMIC	ECJ0EB1E102K
C149	4550006780	S.TANTALUM	TEMSVB2 0J 476M-8R
C150	4030016790	S.CERAMIC	ECJ0EB1C103K
C151	4030017460	S.CERAMIC	ECJ0EB1E102K
C152	4030016790	S.CERAMIC	ECJ0EB1C103K
C153	4030017420	S.CERAMIC	ECJ0EC1H470J
C154	4030017460	S.CERAMIC	ECJ0EB1E102K
C162	4030017460	S.CERAMIC	ECJ0EB1E102K
C198	4030017460	S.CERAMIC	ECJ0EB1E102K
C199	4030017460	S.CERAMIC	ECJ0EB1E102K
C200	4030017460	S.CERAMIC	ECJ0EB1E102K
C205	4550006210	S.TANTALUM	ECST1CX106R
C207	4030011810	S.CERAMIC	C1608 JB 1A 224K-T
C208	4030017460	S.CERAMIC	ECJ0EB1E102K
C209	4030017460	S.CERAMIC	ECJ0EB1E102K

S.=Surface mount

6 - 7

Image 38

Icom IC-T90A manual Trimmer

Contents

IC-t90a Repair Notes IntroductionOrdering Parts Sample OrderTable of Contents Transmitter SpecificationsGeneral WFM ReceiverFrequency MHz WFMTop view Inside ViewsLogic Unit Bottom viewTop view Bottom view AF UnitRF Unit Disassembly Instructions Removing the rear panel Removing the AF unitCircuit Description Receiver CircuitsRF Circuit 4 1ST Mixer and 1ST if Circuits RF, AF and VCO Units5 2ND if and Demodulator Circuits AF Unit 2ND if and Demodulator Circuit AF Amplifier Circuit AF UnitSquelch Circuitaf and Logic Units Transmitter Circuits General PLL CircuitsAPC Circuit RF Unit APC CircuitVCO Divider Circuit VCO and RF Units PLL CircuitPort Allocations Power Supply Circuits2 R3V Switch IC AF Unit IC51 Voltage LineCPU Logic Unit IC1 LCD CtselDtcs SEG35Operation on the Output Power Adjustment Adjustment ProceduresOperation on the Adjustment Mode PreparationAD-92SMA ConnectionJIG VCO Trimmer AdjustmentPLL Lock VoltageL16 L456 VCO UnitRF Unit L19Dial Adjustment Mode AdjustmentsReference FrequencyAdjustment Mode Adjustments PH ch 53.900 MHz Transmitting 8V 145 MHz Displayed frequency Connect an amme 45 a R365 Logic UnitR325 R326Ctcss Tracking DetectorCoil IC151, pin 12 SD line AF UnitCP0 L151Displayed frequency Connect a DC volt Maximum voltage Adjustment Adjustment Condition Operation MeterSection Parts List Order DescriptionCoil Eljre 3N9Z-F Ceramic ECJ0EB1H681K Connector AXK6S30445P Ceramic ECJ0EC1H060C Encoder Trimmer Tantalum ECST1EY474R Ceramic ECJ0EC1H2R5B Chassis Parts Mechanical Parts and DisassemblyAccessories Chassis Parts Logic UnitRF Unit AF Unit VCO UnitDiodes SEMI-CONDUCTOR InformationTransistors and Fets NameMC1 Microphone Board LayoutsTOP View DUPSP1 Logic unitBottom View SQL PTTRF Unit RF unit EXT.SP EXT.MICREMOTO AF UnitVCO Unit S253S252 Block Diagram Logic UnitChassis Loop LPF HPF Drive BPF ANT FIL AMPVoltage Diagram 11 1 Logic UnitIC5 11 2 RF Unit 2SK347611 3 AF Unit BU4094BCFVURL 32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan