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Icom IC-T90A manual Ceramic ECJ0EC1H2R5B

Models: IC-T90A

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[VCO UNIT]

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

R52	7030007290	S.RESISTOR	ERJ2GEJ 222 X (2.2 kΩ )
R208	7030008250	S.RESISTOR	RR0510P-562-D (5.6 kΩ )
R211	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R212	7030008410	S.RESISTOR	ERJ2GEJ 392 X (3.9 kΩ )
R213	7030008280	S.RESISTOR	ERJ2GEJ 271 X (270 Ω )
R215	7030006020	S.RESISTOR	RR0510P-682-D (6.8 kΩ )
R216	7030006030	S.RESISTOR	RR0510P-822-D (8.2 kΩ )
R217	7030006020	S.RESISTOR	RR0510P-682-D (6.8 kΩ )
R220	7030008250	S.RESISTOR	RR0510P-562-D (5.6 kΩ )
R228	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R229	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R230	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R231	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R232	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R233	7030005100	S.RESISTOR	ERJ2GEJ 154 X (150 kΩ )
R234	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R235	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R236	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R238	7030007340	S.RESISTOR	ERJ2GEJ 153 X (15 kΩ )
R239	7030008280	S.RESISTOR	ERJ2GEJ 271 X (270 Ω )
R240	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R241	7030004970	S.RESISTOR	ERJ2GEJ 470 X (47 Ω )
R242	7030007340	S.RESISTOR	ERJ2GEJ 153 X (15 kΩ )
R243	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R244	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
C1	4030017640	S.CERAMIC	ECJ0EC1H150J
C2	4030017460	S.CERAMIC	ECJ0EB1E102K
C4	4030017350	S.CERAMIC	ECJ0EC1H020B
C5	4030017350	S.CERAMIC	ECJ0EC1H020B
C7	4030017460	S.CERAMIC	ECJ0EB1E102K
C8	4030016790	S.CERAMIC	ECJ0EB1C103K
C9	4030017530	S.CERAMIC	ECJ0EC1H0R5B
C10	4030016790	S.CERAMIC	ECJ0EB1C103K
C11	4030017460	S.CERAMIC	ECJ0EB1E102K
C12	4030017460	S.CERAMIC	ECJ0EB1E102K
C13	4030017690	S.CERAMIC	ECJ0EC1H121J
C16	4030017550	S.CERAMIC	ECJ0EC1H1R5B
C17	4030017550	S.CERAMIC	ECJ0EC1H1R5B
C19	4030017730	S.CERAMIC	ECJ0EB1E471K
C20	4030017460	S.CERAMIC	ECJ0EB1E102K
C21	4030017560	S.CERAMIC	ECJ0EC1H2R5B
C22	4030017460	S.CERAMIC	ECJ0EB1E102K
C23	4030017460	S.CERAMIC	ECJ0EB1E102K
C24	4030017460	S.CERAMIC	ECJ0EB1E102K
C25	4030017460	S.CERAMIC	ECJ0EB1E102K
C26	4030017460	S.CERAMIC	ECJ0EB1E102K
C39	4030017550	S.CERAMIC	ECJ0EC1H1R5B
C40	4030017460	S.CERAMIC	ECJ0EB1E102K
C41	4030017460	S.CERAMIC	ECJ0EB1E102K
C42	4030017460	S.CERAMIC	ECJ0EB1E102K
C48	4030017460	S.CERAMIC	ECJ0EB1E102K
C49	4030017590	S.CERAMIC	ECJ0EC1H070C
C50	4030017650	S.CERAMIC	ECJ0EC1H270J
C51	4030017420	S.CERAMIC	ECJ0EC1H470J
C59	4030016930	S.CERAMIC	ECJ0EB1A104K
C63	4030016790	S.CERAMIC	ECJ0EB1C103K
C64	4030017460	S.CERAMIC	ECJ0EB1E102K
C65	4030017460	S.CERAMIC	ECJ0EB1E102K
C66	4030017460	S.CERAMIC	ECJ0EB1E102K
C67	4030017460	S.CERAMIC	ECJ0EB1E102K
C207	4550000540	S.TANTALUM	TESVA 1V 154M1-8L
C209	4030017460	S.CERAMIC	ECJ0EB1E102K
C210	4030017330	S.CERAMIC	ECJ0EF1C104Z
C211	4030017460	S.CERAMIC	ECJ0EB1E102K
C212	4030017460	S.CERAMIC	ECJ0EB1E102K
C213	4340000280	S.MYLAR	ECPU 1C 473MA5
C214	4550007020	S.TANTALUM	ECST1AZ155R
C215	4550007020	S.TANTALUM	ECST1AZ155R
C219	4550006560	S.TANTALUM	ECST1CY225R
C221	4030017460	S.CERAMIC	ECJ0EB1E102K
C224	4030017460	S.CERAMIC	ECJ0EB1E102K
C225	4030017460	S.CERAMIC	ECJ0EB1E102K
C226	4030017460	S.CERAMIC	ECJ0EB1E102K
C228	4030017420	S.CERAMIC	ECJ0EC1H470J
C229	4030017420	S.CERAMIC	ECJ0EC1H470J
C230	4030017460	S.CERAMIC	ECJ0EB1E102K
C232	4030016930	S.CERAMIC	ECJ0EB1A104K
C233	4030017460	S.CERAMIC	ECJ0EB1E102K
C234	4030017660	S.CERAMIC	ECJ0EC1H330J
C235	4030017550	S.CERAMIC	ECJ0EC1H1R5B

[VCO UNIT]

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

C236	4030017460	S.CERAMIC	ECJ0EB1E102K
C237	4030017460	S.CERAMIC	ECJ0EB1E102K
C238	4550007040	S.TANTALUM	ECST0JZ106R
C239	4030017340	S.CERAMIC	ECJ0EC1H010B
J1	6910011530	CONNECTOR	IMSA-9230B-1-08Z057-T
J2	6910014430	CONNECTOR	IMSA-9230B-1-06Z057-T
W1	7030010040	S.JUMPER	ERJ2GE-JPW
EP1	0910054453	PCB	B 5737C
EP2	6910012350	S.BEAD	MMZ1608Y 102BT

S.=Surface mount

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Image 40

Icom IC-T90A manual Ceramic ECJ0EC1H2R5B

Contents

IC-t90a Introduction Ordering PartsRepair Notes Sample OrderTable of Contents General SpecificationsTransmitter Receiver Frequency MHzWFM WFMInside Views Logic UnitTop view Bottom viewRF Unit AF UnitTop view Bottom view Disassembly Instructions Removing the rear panel Removing the AF unitCircuit Description Receiver Circuits5 2ND if and Demodulator Circuits AF Unit 4 1ST Mixer and 1ST if Circuits RF, AF and VCO UnitsRF Circuit Squelch Circuitaf and Logic Units AF Amplifier Circuit AF Unit2ND if and Demodulator Circuit Transmitter Circuits PLL Circuits APC Circuit RF UnitGeneral APC CircuitVCO Divider Circuit VCO and RF Units PLL CircuitPower Supply Circuits 2 R3V Switch IC AF Unit IC51Port Allocations Voltage LineCPU Logic Unit IC1 Ctsel DtcsLCD SEG35Adjustment Procedures Operation on the Adjustment ModeOperation on the Output Power Adjustment PreparationJIG ConnectionAD-92SMA Trimmer Adjustment PLL LockVCO VoltageVCO Unit RF UnitL16 L456 L19Adjustment Mode Adjustments ReferenceDial FrequencyAdjustment Mode Adjustments PH ch 53.900 MHz Transmitting 8V 145 MHz Displayed frequency Connect an amme 45 a Logic Unit R325R365 R326Ctcss Coil DetectorTracking AF Unit CP0IC151, pin 12 SD line 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 Accessories Mechanical Parts and DisassemblyChassis Parts Logic Unit RF UnitChassis Parts AF Unit VCO UnitSEMI-CONDUCTOR Information Transistors and FetsDiodes NameBoard Layouts TOP ViewMC1 Microphone DUPLogic unit Bottom ViewSP1 SQL PTTRF Unit RF unit VCO Unit AF UnitEXT.SP EXT.MICREMOTO 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