Motorola IC-T81E, IC-T81A service manual Themistor

Page 29

[RF UNIT]

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

R351	7030005300	S.RESISTOR	ERJ2GEJ 150 X (15 Ω )
R401	7030007300	S.RESISTOR	ERJ2GEJ 332 X (3.3 kΩ )
R402	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R403	7030007300	S.RESISTOR	ERJ2GEJ 332 X (3.3 kΩ )
R404	7030005060	S.RESISTOR	ERJ2GEJ 333 X (33 kΩ )
R409	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R410	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R413	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R414	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R501	7030007300	S.RESISTOR	ERJ2GEJ 332 X (3.3 kΩ )
R502	7030005070	S.RESISTOR	ERJ2GEJ 683 X (68 kΩ )
R503	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R504	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R505	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R506	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R507	7030007290	S.RESISTOR	ERJ2GEJ 222 X (2.2 kΩ )
R508	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R509	7030007290	S.RESISTOR	ERJ2GEJ 222 X (2.2 kΩ )
R510	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R511	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R512	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R513	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R608	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R609	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R610	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R611	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R612	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R613	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R614	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R615	7030008280	S.RESISTOR	ERJ2GEJ 271 X (270 Ω )
R616	7030008370	S.RESISTOR	ERJ2GEJ 561 X (560 Ω )
R701	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R702	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R721	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R722	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R725	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R726	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R727	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R728	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R742	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R802	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R803	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R804	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R805	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R806	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R807	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R811	7030005720	S.RESISTOR	ERJ2GEJ 563 X (56 kΩ )
R812	7030005080	S.RESISTOR	ERJ2GEJ 823 X (82 kΩ )
R813	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R814	7510001240	S.THEMISTOR	ERTJ0EV 473J (47K)
R815	7030007300	S.RESISTOR	ERJ2GEJ 332 X (3.3 kΩ )
R816	7030005290	S.RESISTOR	ERJ2GEJ 682 X (6.8 kΩ )
R817	7030008280	S.RESISTOR	ERJ2GEJ 271 X (270 Ω )
R818	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R819	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R820	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R821	7030005290	S.RESISTOR	ERJ2GEJ 682 X (6.8 kΩ )
R826	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R827	7030005080	S.RESISTOR	ERJ2GEJ 823 X (82 kΩ )
R828	7030004990	S.RESISTOR	ERJ2GEJ 221 X (220 Ω )
R829	7030004970	S.RESISTOR	ERJ2GEJ 470 X (47 Ω )
R838	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R839	7030005300	S.RESISTOR	ERJ2GEJ 150 X (15 Ω )
R841	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R842	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R844	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R845	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R847	7030005300	S.RESISTOR	ERJ2GEJ 150 X (15 Ω )
			[AUS], [SEA], [USA-1]
	7030005570	S.RESISTOR	ERJ2GEJ 820 X (82 Ω )
			[EUR], [UK], [ITA]
R848	7030005300	S.RESISTOR	ERJ2GEJ 150 X (15 Ω )
			[AUS], [SEA], [USA-1]
	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
			[EUR], [UK], [ITA]
R849	7030007300	S.RESISTOR	ERJ2GEJ 332 X (3.3 kΩ )
R850	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R851	7030008280	S.RESISTOR	ERJ2GEJ 271 X (270 Ω )
R852	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R853	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R854	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R855	7030005290	S.RESISTOR	ERJ2GEJ 682 X (6.8 kΩ )

[RF UNIT]

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

R857	7030008370	S.RESISTOR	ERJ2GEJ 561 X (560 Ω )
R862	7030005290	S.RESISTOR	ERJ2GEJ 682 X (6.8 kΩ )
R864	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R865	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R866	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R867	7030004990	S.RESISTOR	ERJ2GEJ 221 X (220 Ω )
R868	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R869	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R870	7030004970	S.RESISTOR	ERJ2GEJ 470 X (47 Ω )
R871	7030007340	S.RESISTOR	ERJ2GEJ 153 X (15 kΩ )
R872	7030008010	S.RESISTOR	ERJ2GEJ 123 (12 kΩ )
R874	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R875	7030005220	S.RESISTOR	ERJ2GEJ 223 X (22 kΩ )
R876	7030009140	S.RESISTOR	ERJ2GEJ 272 X (2.7 kΩ )
R877	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R881	7030004990	S.RESISTOR	ERJ2GEJ 221 X (220 Ω )
R882	7030005600	S.RESISTOR	ERJ2GEJ 273 X (27 kΩ )
R884	7030004990	S.RESISTOR	ERJ2GEJ 221 X (220 Ω )
R885	7030005060	S.RESISTOR	ERJ2GEJ 333 X (33 kΩ )
R887	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R888	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R889	7030004990	S.RESISTOR	ERJ2GEJ 221 X (220 Ω )
R890	7030007350	S.RESISTOR	ERJ2GEJ 393 X (39 kΩ )
R892	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R893	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R894	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R895	7030005060	S.RESISTOR	ERJ2GEJ 333 X (33 kΩ )
R897	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R898	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R899	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R900	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R901	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R902	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R903	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R904	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R905	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R906	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R907	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R908	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R909	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R910	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R911	7030007330	S.RESISTOR	ERJ1WRSJR15U (0.15 Ω )
R912	7030008400	S.RESISTOR	ERJ2GEJ 182 X (1.8 kΩ )
R913	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R914	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R915	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R916	7030005160	S.RESISTOR	ERJ2GEJ 105 X (1 MΩ )
R917	7030005220	S.RESISTOR	ERJ2GEJ 223 X (22 kΩ )
R918	7030005600	S.RESISTOR	ERJ2GEJ 273 X (27 kΩ )
R919	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R923	7030005600	S.RESISTOR	ERJ2GEJ 273 X (27 kΩ )
R924	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R925	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R928	7030003260	S.RESISTOR	ERJ3GEYJ 330 V (33 Ω )
R929	7030005120	S.RESISTOR	ERJ2GEJ 102 X (1 kΩ )
R930	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R931	7030005090	S.RESISTOR	ERJ2GEJ 104 X (100 kΩ )
R932	7030005050	S.RESISTOR	ERJ2GEJ 103 X (10 kΩ )
R933	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R934	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R935	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R936	7030005590	S.RESISTOR	ERJ2GEJ 680 X (68 Ω )
R938	7030007260	S.RESISTOR	ERJ2GEJ 330 X (33 Ω )
R939	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R940	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R942	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R943	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R944	7030005240	S.RESISTOR	ERJ2GEJ 473 X (47 kΩ )
R945	7030007270	S.RESISTOR	ERJ2GEJ 151 X (150 Ω )
R946	7030004980	S.RESISTOR	ERJ2GEJ 101 X (100 Ω )
R949	7030004010	S.RESISTOR	ERJ3GEYJ 2R2 V (2.2 Ω )
R951	7030007280	S.RESISTOR	ERJ2GEJ 331 X (330 Ω )
R952	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
R953	7030005040	S.RESISTOR	ERJ2GEJ 472 X (4.7 kΩ )
R954	7030005000	S.RESISTOR	ERJ2GEJ 471 X (470 Ω )
C1	4030013980	S.CERAMIC	ECUE1H010BCQ
C2	4030014050	S.CERAMIC	ECUE1H030BCQ
C3	4030014050	S.CERAMIC	ECUE1H030BCQ
C4	4030014110	S.CERAMIC	ECUE1H080CCQ
C5	4030014190	S.CERAMIC	ECUE1H680JCQ

S.=Surface mount

6 - 6

Image 29

Contents Multiband FM Transceiver Ordering Parts IntroductionRepair Notes Sample OrderTable of Contents General SpecificationsTransmitter Version 50 MHz 145 MHz 440 MHz 1200 MHz MHz RX onlyBand ReceiverWFM WFMLogic Unit Inside ViewsRF Unit CPURemoving the Chassis Panel Removing the Shield Plate Disassembly InstructionsRemoving the Logic Unit Removing the RF Unit Logic unitCircuit Description Antenna Switching Circuits RF UnitReceiver Circuits Duplexer Circuit RF Unit7 1ST Mixer Circuit RF Unit Transmitter Circuits APC Circuits RF Unit DRIVE/POWER Amplifier Circuits RF UnitMHz PA APC Control CircuitPLL Circuits Power Supply Circuits Voltage LineLine Description VCC1 I/O Expander IC RF Unit IC2 Port Allocations2 I/O Expander IC RF Unit IC3 Pin Port Description Number NameCPU Logic Unit IC1 Preparation Adjustment Procedures‘ Required Test Equipment ConnectionPLL Adjustment ULV RF Unit Bottom ViewVLV RF Unit TOP View 6MLVDial Receiver AdjustmentSensitivity VHFLogic Unit TOP View SSG MeterTop Push and hold MHz band 101 dBmPush and hold Displayed frequency445.000 MHz USA-1 SQL keyTransmitter Adjustment HPF OFF LPF DeviationDtmf AUS, SEA=Surface mount Parts ListTrimmer Ceramic ECUE1H121JCQ Transistor UN911D TX Coil Eljnd R10J 0.1U Themistor Ceramic ECUE1H060CCQ Ceramic ECUE1H390JCQ VCO Board Ceramic ECUE1H120JCQ Accessories Mechanical Parts and DisassemblyChassis Parts VCO UnitMP29 C Diodes SEMI-CONDUCTOR InformationTransistor and FET’S TOP View Board LayoutsLogic Unit IC1 Bottom ViewIC3 GND Pset IfinIC6 RF UnitL912 J4 to Logic unit J1IC2 MP1IC3 J302 to RF unit VCO BoardOUT 12VCOOUT VLVCO3 VHF GND VHVCO3 UVCO3 Uhfout GND 12VCO3 GNDQ354 Block Diagram TX/RX Frequency Mode Xtal BPF PDA2, CK AMPTX/RX Buff ANT LPF HPF AMPMode Xtal Initial BPF ResetMOD TX/RX Frequency ANT Buff HPF LPF YGRLogic Unit Section Voltage DiagramOscin Mixin Oscout GND Mixout REC VCC DET Ifin Rssi 2NDLODEC Ifout Filout Quad WFM NTCCF20124AH 473KCT TXCCOM3 COM2 Reset Power 12VCO COM2 ResetClonein VCC VIN Cpuhv COM4 COM3 COM2 COM1VHF RF Unit400M 1200M00M 50M1200MHz 400MHzPLST1 IN1 GND1ENB VCC2 LOK GND2Icom America Inc Icom Inc 5566I-S