Motorola IC-T81A Mechanical Parts and Disassembly, Chassis Parts, VCO Unit, Accessories, EP3

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SECTION 7 MECHANICAL PARTS AND DISASSEMBLY

[CHASSIS PARTS]

REF. NO.	ODER NO.		DESCRIPTION	QTY.

J1	6510020650	Connector SMA-R224		1
S1	7600000210	Encoder TP70N00E20-15F-1903		1
SP1	2510000960	Speaker CS028014-12		1
MP1	8210016140	2135	Front panel (A) [EUR], [UK], [ITA]	1
	8210016130	2135	Front panel (B) [AUS], [SEA], [USA-1]	1
MP2	8010017680	2135 chassis		1
MP3	8930048450	2135	10-Key	1
MP6	8930048470	2135 PW button		1
MP7	8310045560	2135	Window plate	1
MP9	8930048840	2135 Mic sponge		1
MP10	8830001450	2135 Hex nut		1
MP13	8930048480	2135	Main seal	1
MP14	8930048490	2135 Mic cap		1
MP17	8930045940	1903	Botton sheet	1
MP18	8930046020	1123 Sheet (A)-1		1
MP19	8610010530	Knob N-263		1
MP20	8930044460	1903	Contact rubber	1
MP21	8930044530	1903	Rubber sheet	1
MP22	8950004810	1903	SP spring	2
MP23	8830001220	Nut (F)		1
MP24	8930048630	1903	Rear sheet (G) [USA-1]	1
	8930048640	1903	Rear sheet (H) [AUS], [SEA]	1
	8930048650	1903	Rear sheet (I) [EUR], [UK], [ITA]	1
MP25	8930044470	1903 DC cap		1
MP26	8930044480	1903 Lens		1
MP28	8810008990	Screw PH BT M2x10 ZX		2
MP29	8810009510	Screw FH BT M2x4 NI-ZU		11
MP30	8810009630	Screw FH No.0 M2x4.5 NI B		2
MP31	8930049140	2135	Earth plate	1
MP32	8930049040	Thermally sheet (FQ)		1

[RF UNIT]

REF. NO.	ODER NO.		DESCRIPTION	QTY.

MP1	8410002280	2135	PA heatsink-2	1
MP2	8950004800	1903	Contact spring	1

[LOGIC UNIT]

REF. NO.	ODER NO.	DESCRIPTION	QTY.

DS4	5030001700	LCD LM-1782	1
EP2	8930048950	LCD Contact SRCN-2135-SP-N-W	1
MP1	8930048500	2135 LCD Holder	1
MP2	8930015960	2135 Reflector	1
MP4	8610010680	Knob N-271	1
MP5	8810009790	Screw PH BT 1.7x4 NI-ZU	2
MP6	8510012200	2135 LOGIC shield	1
MP9	8930049020	2315 LOGIC sheet	1

[VCO UNIT]

REF. NO.	ODER NO.	DESCRIPTION	QTY.

MP1	8510012100	2135 VCO case	1

[ACCESSORIES]

REF. NO.	ODER NO.					DESCRIPTION				QTY.

EP1	Optional product				Antenna FA-S6270A					1
EP2	Optional product				Battery BP-200 [USA-1] only					1
	Optional product				Battery BP-199 [EUR], [UK], [ITA], [AUS]					1
EP3	Optional product				Charger BC-110A [USA-1] only					1
	Optional product				Charger BC-110V [AUS] only					1
	Optional product				Charger BC-110D [EUR], [ITA]					1
MP1	8930044450				1903 Belt clip					1
MP2	8010011960				Strap belt HK-005					1

EP2		EP1				MP2	MP1

EP3

Screw abbreviations A, B0, BT: Self-tapping PH: Pan head

FH: Flat head

BiH: Bind head

NI: Nickel

SUS: Stainless

ZK: Black

7 - 1

Image 34

Contents Multiband FM Transceiver Repair Notes IntroductionOrdering Parts Sample OrderTable of Contents Transmitter SpecificationsGeneral Version 50 MHz 145 MHz 440 MHz 1200 MHz MHz RX onlyWFM ReceiverBand WFMRF Unit Inside ViewsLogic Unit CPURemoving the Logic Unit Removing the RF Unit Disassembly InstructionsRemoving the Chassis Panel Removing the Shield Plate Logic unitReceiver Circuits Antenna Switching Circuits RF UnitCircuit Description Duplexer Circuit RF Unit7 1ST Mixer Circuit RF Unit Transmitter Circuits MHz PA DRIVE/POWER Amplifier Circuits RF UnitAPC Circuits RF Unit APC Control CircuitLine Description Power Supply Circuits Voltage LinePLL Circuits VCC2 I/O Expander IC RF Unit IC3 Port Allocations1 I/O Expander IC RF Unit IC2 Pin Port Description Number NameCPU Logic Unit IC1 ‘ Required Test Equipment Adjustment ProceduresPreparation ConnectionPLL Adjustment VLV RF Unit Bottom ViewULV RF Unit TOP View 6MLVSensitivity Receiver AdjustmentDial VHFLogic Unit TOP View Top Push and hold MHz band MeterSSG 101 dBm445.000 MHz USA-1 Displayed frequencyPush and hold SQL keyTransmitter Adjustment Dtmf DeviationHPF OFF LPF AUS, SEAParts List =Surface mountTrimmer Ceramic ECUE1H121JCQ Transistor UN911D TX Coil Eljnd R10J 0.1U Themistor Ceramic ECUE1H060CCQ Ceramic ECUE1H390JCQ VCO Board Ceramic ECUE1H120JCQ Chassis Parts Mechanical Parts and DisassemblyAccessories VCO UnitMP29 C Transistor and FET’S SEMI-CONDUCTOR InformationDiodes Logic Unit Board LayoutsTOP View IC3 Bottom ViewIC1 GND Pset IfinL912 RF UnitIC6 J4 to Logic unit J1IC3 MP1IC2 OUT 12VCOOUT VCO BoardJ302 to RF unit VLVCO3 VHF GND VHVCO3 UVCO3 Uhfout GND 12VCO3 GNDQ354 Block Diagram TX/RX Buff Mode Xtal BPF PDA2, CK AMPTX/RX Frequency ANT LPF HPF AMPMOD TX/RX Frequency ResetMode Xtal Initial BPF ANT Buff HPF LPF YGRSection Voltage Diagram Logic UnitDEC Ifout Filout Quad 2NDLOOscin Mixin Oscout GND Mixout REC VCC DET Ifin Rssi WFM NTCCF20124AH 473KCT TXCClonein VCC VIN Cpuhv 12VCO COM2 ResetCOM3 COM2 Reset Power COM4 COM3 COM2 COM1400M RF UnitVHF 1200M1200MHz 50M00M 400MHzENB VCC2 GND1PLST1 IN1 LOK GND2Icom America Inc 5566I-S Icom Inc