Icom IC-T90A manual Tantalum ECST1EY474R

Page 39

[LOGIC UNIT]

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

C211	4550006140	S.TANTALUM	ECST1EY474R
C240	4030009980	S.CERAMIC	C1608 JB 1H 152K-T
C242	4030016940	S.CERAMIC	ECJ0EB1A393K
C243	4030017330	S.CERAMIC	ECJ0EF1C104Z
C244	4030016930	S.CERAMIC	ECJ0EB1A104K
C246	4030016930	S.CERAMIC	ECJ0EB1A104K
C247	4030017430	S.CERAMIC	ECJ0EC1H101J
C248	4550006150	S.TANTALUM	ECST1CY105R
C304	4030017430	S.CERAMIC	ECJ0EC1H101J
C305	4030017420	S.CERAMIC	ECJ0EC1H470J
C306	4550006620	S.TANTALUM	ECST0JY226R
C308	4030009630	S.CERAMIC	C1608 JB 1H 822K-T
C310	4030017420	S.CERAMIC	ECJ0EC1H470J
C311	4550005980	S.TANTALUM	TEMSVA 1A 475M-8L
C312	4030017460	S.CERAMIC	ECJ0EB1E102K
C313	4030017420	S.CERAMIC	ECJ0EC1H470J
C314	4030011810	S.CERAMIC	C1608 JB 1A 224K-T
C315	4030017460	S.CERAMIC	ECJ0EB1E102K
C316	4550005980	S.TANTALUM	TEMSVA 1A 475M-8L
C317	4030016950	S.CERAMIC	ECJ0EB1A473K
C318	4030016960	S.CERAMIC	ECJ0EB1C183K
C319	4030017420	S.CERAMIC	ECJ0EC1H470J
C320	4030017460	S.CERAMIC	ECJ0EB1E102K
C321	4030017460	S.CERAMIC	ECJ0EB1E102K
C323	4030017460	S.CERAMIC	ECJ0EB1E102K
C324	4030017460	S.CERAMIC	ECJ0EB1E102K
C325	4030017460	S.CERAMIC	ECJ0EB1E102K
C326	4030017460	S.CERAMIC	ECJ0EB1E102K
C340	4030017460	S.CERAMIC	ECJ0EB1E102K
C341	4030017460	S.CERAMIC	ECJ0EB1E102K
C347	4550006320	S.TANTALUM	ECST0JY475R
C348	4550006620	S.TANTALUM	ECST0JY226R
C400	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C401	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C402	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C403	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C404	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C405	4030008680	S.CERAMIC	C2012 JF 1C 105Z-T
C451	4030016790	S.CERAMIC	ECJ0EB1C103K
C452	4030016790	S.CERAMIC	ECJ0EB1C103K
C453	4030017460	S.CERAMIC	ECJ0EB1E102K
C454	4030016930	S.CERAMIC	ECJ0EB1A104K
C455	4030009630	S.CERAMIC	C1608 JB 1H 822K-T
C456	4550006620	S.TANTALUM	ECST0JY226R
C919	4030016790	S.CERAMIC	ECJ0EB1C103K
C920	4030016790	S.CERAMIC	ECJ0EB1C103K
J1	6510022470	S.CONNECTOR	40FLT-SM1-TB
DS1	5010000160	S.LED	LNJ310M6URA
DS2	5010000160	S.LED	LNJ310M6URA
DS3	5010000150	S.LED	LT1EP53A
DS4	5030001990	LCD	TTR5169 UPFDHW
DS5	5040002670	S.LED	CL-165HR/YG
DS6	5040002670	S.LED	CL-165HR/YG
DS7	5040002670	S.LED	CL-165HR/YG
DS8	5040002670	S.LED	CL-165HR/YG
DS9	5040002670	S.LED	CL-165HR/YG
DS10	5040002670	S.LED	CL-165HR/YG
DS11	5040002670	S.LED	CL-165HR/YG
DS12	5040002670	S.LED	CL-165HR/YG
MC1	7700002310	MICROPHONE	EM-140
S401	2230001090	S.SWITCH	EVQPSH02K
S402	2230001090	S.SWITCH	EVQPSH02K
SP1	2510000840	SPEAKER	CS028014-12
W1	8900010520	CABLE	OPC-1033
W2	7120000470	JUMPER	ERDS2T0
W3	7030000010	S.JUMPER	MCR10EZHJ JPW (000)
EP1	8930055190	LCD CONTACT	SRCN-2372-SP-N-W
EP2	0910054444	PCB	B 5736D

[LOGIC UNIT]

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

EP3	6910012350	S.BEAD	MMZ1608Y 102BT
EP141	6910012350	S.BEAD	MMZ1608Y 102BT
EP142	6910012350	S.BEAD	MMZ1608Y 102BT

[VCO UNIT]

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

IC1	1110004460	S.IC	µPB1509GV-E1
IC201	1130007610	S.IC	µPD3140GS-E1 (DS8)
Q1	1530003810	S.TRANSISTOR	2SC5008-T1
Q2	1530003810	S.TRANSISTOR	2SC5008-T1
Q3	1590001860	S.TRANSISTOR	UN9215 (TX)
Q4	1530003810	S.TRANSISTOR	2SC5008-T1
Q5	1530003810	S.TRANSISTOR	2SC5008-T1
Q7	1530003560	S.TRANSISTOR	2SC5195-T1
Q11	1530003310	S.TRANSISTOR	2SC5107-O (TE85R)
Q14	1590001660	S.TRANSISTOR	XP4312 (TX)
Q15	1590001470	S.TRANSISTOR	UN9213 (TX)
Q16	1530003810	S.TRANSISTOR	2SC5008-T1
Q206	1560000540	S.FET	2SK880-Y (TE85R)
Q207	1530003010	S.TRANSISTOR	2SC4117-GR (TE85R)
Q211	1530002600	S.TRANSISTOR	2SC4215-O (TE85R)
Q212	1530003810	S.TRANSISTOR	2SC5008-T1
D1	1720000790	S.VARICAP	HVC321B1TRF
D2	1790001260	S.DIODE	MA2S077-(TX)
D3	1720000790	S.VARICAP	HVC321B1TRF
D7	1750000800	S.DIODE	HVC136TRF
D8	1750000800	S.DIODE	HVC136TRF
D9	1750000800	S.DIODE	HVC136TRF
D10	1750000800	S.DIODE	HVC136TRF
L2	6200007760	S.COIL	LQW2BHN82NJ01L (LQN21A 82NJ04)
L3	6200004480	S.COIL	MLF1608D R82K-T
L4	6200010110	S.COIL	0.20-0.8-4TR 11N
L12	6200006980	S.COIL	ELJRE R10G-F
L13	6200007000	S.COIL	ELJRE 82NG-F
L201	6200003550	S.COIL	MLF1608A 4R7K-T
L202	6200003550	S.COIL	MLF1608A 4R7K-T
L203	6200006960	S.COIL	MLF1608A 2R7K-T
R1	7030005700	S.RESISTOR	ERJ2GEJ 274 X (270 kΩ )
R2	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R3	7030009290	S.RESISTOR	ERJ2GEJ 562 X (5.6 kΩ )
R4	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R5	7030008400	S.RESISTOR	ERJ2GEJ 182 X (1.8 kΩ )
R6	7030009290	S.RESISTOR	ERJ2GEJ 562 X (5.6 kΩ )
R7	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R8	7030005300	S.RESISTOR	ERJ2GEJ 150 X (15 Ω )
R9	7030005700	S.RESISTOR	ERJ2GEJ 274 X (270 kΩ )
R10	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R11	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R12	7030005710	S.RESISTOR	ERJ2GEJ 121 X (120 Ω )
R13	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R14	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R15	7030005710	S.RESISTOR	ERJ2GEJ 121 X (120 Ω )
R16	7030009320	S.RESISTOR	ERJ2GEJ 4R7 X (4.7 Ω )
R17	7030005060	S.RESISTOR	ERJ2GEJ 333 X (33 kΩ )
R18	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R19	7030005530	S.RESISTOR	ERJ2GEJ 100 X (10 Ω )
R33	7030005060	S.RESISTOR	ERJ2GEJ 333 X (33 kΩ )
R34	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R35	7030004970	S.RESISTOR	ERJ2GEJ 470 X (47 Ω )
R44	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R45	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R46	7030007570	S.RESISTOR	ERJ2GEJ 122X (1.2 kΩ )
R47	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R48	7030004990	S.RESISTOR	ERJ2GEJ 221 X (220 Ω )
R49	7030008410	S.RESISTOR	ERJ2GEJ 392 X (3.9 kΩ )
R50	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R51	7030007290	S.RESISTOR	ERJ2GEJ 222 X (2.2 kΩ )

S.=Surface mount

6 - 8

Image 39

Contents IC-t90a Sample Order IntroductionOrdering Parts Repair NotesTable of Contents Specifications GeneralTransmitter WFM ReceiverFrequency MHz WFMBottom view Inside ViewsLogic Unit Top viewAF Unit RF UnitTop view Bottom view Removing the rear panel Removing the AF unit Disassembly InstructionsReceiver Circuits Circuit Description4 1ST Mixer and 1ST if Circuits RF, AF and VCO Units 5 2ND if and Demodulator Circuits AF UnitRF Circuit AF Amplifier Circuit AF Unit Squelch Circuitaf and Logic Units2ND if and Demodulator Circuit Transmitter Circuits APC Circuit PLL CircuitsAPC Circuit RF Unit GeneralPLL Circuit VCO Divider Circuit VCO and RF UnitsVoltage Line Power Supply Circuits2 R3V Switch IC AF Unit IC51 Port AllocationsCPU Logic Unit IC1 SEG35 CtselDtcs LCDPreparation Adjustment ProceduresOperation on the Adjustment Mode Operation on the Output Power AdjustmentConnection JIGAD-92SMA Voltage Trimmer AdjustmentPLL Lock VCOL19 VCO UnitRF Unit L16 L456Frequency Adjustment Mode AdjustmentsReference DialAdjustment Mode Adjustments PH ch 53.900 MHz Transmitting 8V 145 MHz Displayed frequency Connect an amme 45 a R326 Logic UnitR325 R365Ctcss Detector CoilTracking L151 AF UnitCP0 IC151, pin 12 SD lineDisplayed frequency Connect a DC volt Maximum voltage Meter Adjustment Adjustment Condition OperationOrder Description Section Parts ListCoil Eljre 3N9Z-F Ceramic ECJ0EB1H681K Connector AXK6S30445P Ceramic ECJ0EC1H060C Encoder Trimmer Tantalum ECST1EY474R Ceramic ECJ0EC1H2R5B Mechanical Parts and Disassembly AccessoriesChassis Parts AF Unit VCO Unit Logic UnitRF Unit Chassis PartsName SEMI-CONDUCTOR InformationTransistors and Fets DiodesDUP Board LayoutsTOP View MC1 MicrophoneSQL PTT Logic unitBottom View SP1RF Unit RF unit AF Unit VCO UnitEXT.SP EXT.MICREMOTO S253S252 Logic Unit Block DiagramLoop LPF HPF Drive BPF ANT FIL AMP Chassis11 1 Logic Unit Voltage DiagramIC5 2SK3476 11 2 RF UnitBU4094BCFV 11 3 AF UnitURL 32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan