Manuals / Motorola / Marine Equipment / Marine Radio

Motorola IC-T81E Oscin Mixin Oscout GND Mixout REC VCC DET Ifin Rssi, Thermc 2NDLO Pset, Afo

Models: IC-T81E IC-T81A

1 53

Download 53 pages 31.81 Kb

Page 47

	R+3	R: 3.4							NOISE	SD
		T: 0
						C737
						0.01			2NDLO
									2NDLO
						R+3
	C709	C708		R717
	C709	C708		1 K			C707	C706	R726
	15	0.1					0.1	0.01	47 K
								C703
				1			16	0.001
				1	OSCIN	MIXIN	16
				2	OSCIN	MIXIN	15
				3	OSCOUT	GND	14
				4	MIXOUT	N-REC	13
				5	VCC	N-DET	12
				6	IFIN	RSSI	11		C700
	R737			7	DEC	IFOUT	10		C700
	R737			7	FILOUT	QUAD	10		0.1
	TBPS1R153K460H5Q	C735		8	FILIN	AFOUT	9	C712
		0.1		R730				33 P R727
		0.1		220 K	IC701			33 P R727
	R735				IC701			22 K
	15 K				TA31136FN(D)
			C734	C733
		C736	C734	0.001
		C736	0.001	0.001
		0.001	0.001
R736	R734	0.001
R736	R734
15 K	22 K		R731	R732
			180 K	4.7 K				C701
C713								C701
C713		R733						180 P
0.001		R733						180 P
0.001		20 K
		20 K
	R706
	10 K
								L702
								LS-528

C720

0.047

R729

1.8 K Q702

UN9115

1

16

WFM

R+3

R1

NTCCF20124AH 473KCT

TXC

R2
100K	8	7	6	5

C907

0.001

1 2 3 4 IC4

TC4W53FU

THERMC

2NDLO

PSET

+3C

C: 13.2

C906

0.001

2NDLO

IFIN

THERM

PSET

DATA

+3C

CK

PDA2/UL

AGC

VCC

TUNE

VHVCO

LOCKV

UVCO

PLST1

TXC

PDA1/UL

12VCO

BDET

WFM

AM

MOD

IOST	J1 AXK6S40645P

140

GND

239

338

437

GND

536

635

734

833

932

1031

1130

1229

1328

GND

1427

GND

15 26

	2	DO	VCC	15
C212		LD	VDD
150	3	CLK	AO6	14
	4			13
		DI	AO5

R+3

PLST2

CHGC

GND

16

25

	5	AO1	AO4	12
R201	6	AO2	AO3	11
R201	7	AO2	AO3	10

6MVCO

17 24

10	NC	NC
8	GND	VSS	9
C201

0.047	IC5
	M62368GP

HV

FSET

DC-DC

18

GND

19

23

22

	C77	PSET	DATA CK DAST		TUNE	FSET
R205	0.001
68
68
R204		+3C
68				VCC	R+3
.2				VCC	R+3
R203
68		VCC

EURDEV

20

21

C205					Q7			C: 3.3
47					XP1501 AB
					XP1501 AB
					1	5		Q8
AB	R208							Q8
AB	R208				R3C 2			2SB1132 R
	10K				R3C 2
	10K				AFON
					3	4
	C207	C162	R207			C75		C76
	C207	C162	1 M
	4.7	0.001	1 M
	4.7	0.001				2.2		0.001
						2.2		0.001
					C: 5.0
					DC-DC
31	R332		R323	R337			L3
0 K	39 K		56 K	470 K			L3
0 K	39 K		56 K	470 K			330∝
					VCC		330∝
					VCC
					R342
					10 K
25	R326		R327	R338	+3C	3	2	1
K	50 K		50 K	50 K		3	2	1
K	50 K		50 K	50 K
					R343			Q308
					27 K			XP5601 AB
4	Q305		Q306	Q309				XP5601 AB
4	Q305		Q306	Q309		4	5	6
364 Q	2SJ364 Q		2SJ364 Q	2SJ364 Q		4	5	6
364 Q	2SJ364 Q		2SJ364 Q	2SJ364 Q
					MOD			D3
								D3
								MA2S111	C2
					C326				C2
	C321		C322	C328	C326				0.001
	C321		C322	C328	0.001	R334
	0.001		0.001	0.001		R334		C1
	0.001		0.001	0.001		1 K
						1 K
								4.7
	R329		R330	R339
	470 K		470 K	470 K
UVCO		6MVCO	12VCO

C904	C903	C910		C914	C913 C912	C909
0.001	0.001	0.001		0.001	0.001 0.001	0.001
						AFO
						INTSP
SPREMOTE
C917	C901					C923
0.001	C901					C923
0.001	0.001					47 P
	0.001					47 P

	D2
C17	MA729
0.68

IC3

XC6371A500PR

L1	L2
5CA-395KN-0369AQ	4.7 ∝
I	O

		G
	C: 2.5	C6
	C: 2.5	4.7
		4.7

R901

330

C927

0.001

C926

0.001

J3 HSJ1501-011010

J4 HSJ1122-010010

11 - 1	COMPLETE VIEW
11 - 1

Image 47

Motorola IC-T81E Oscin Mixin Oscout GND Mixout REC VCC DET Ifin Rssi, DEC Ifout Filout Quad, Thermc 2NDLO Pset, Afo

Contents

Multiband FM Transceiver Sample Order IntroductionOrdering Parts Repair NotesTable of Contents Version 50 MHz 145 MHz 440 MHz 1200 MHz MHz RX only SpecificationsGeneral TransmitterWFM ReceiverBand WFMCPU Inside ViewsLogic Unit RF UnitLogic unit Disassembly InstructionsRemoving the Chassis Panel Removing the Shield Plate Removing the Logic Unit Removing the RF UnitDuplexer Circuit RF Unit Antenna Switching Circuits RF UnitCircuit Description Receiver Circuits7 1ST Mixer Circuit RF Unit Transmitter Circuits APC Control Circuit DRIVE/POWER Amplifier Circuits RF UnitAPC Circuits RF Unit MHz PAVCC Power Supply Circuits Voltage LinePLL Circuits Line DescriptionPin Port Description Number Name Port Allocations1 I/O Expander IC RF Unit IC2 2 I/O Expander IC RF Unit IC3CPU Logic Unit IC1 Connection Adjustment ProceduresPreparation ‘ Required Test EquipmentPLL Adjustment RF Unit TOP View 6MLV RF Unit Bottom ViewULV VLVVHF Receiver AdjustmentDial SensitivityLogic Unit TOP View 101 dBm MeterSSG Top Push and hold MHz bandSQL key Displayed frequencyPush and hold 445.000 MHz USA-1Transmitter Adjustment AUS, SEA DeviationHPF OFF LPF Dtmf=Surface mount Parts ListTrimmer Ceramic ECUE1H121JCQ Transistor UN911D TX Coil Eljnd R10J 0.1U Themistor Ceramic ECUE1H060CCQ Ceramic ECUE1H390JCQ VCO Board Ceramic ECUE1H120JCQ VCO Unit Mechanical Parts and DisassemblyAccessories Chassis PartsMP29 C Diodes SEMI-CONDUCTOR InformationTransistor and FET’S TOP View Board LayoutsLogic Unit GND Pset Ifin Bottom ViewIC1 IC3J4 to Logic unit J1 RF UnitIC6 L912IC2 MP1IC3 VLVCO3 VHF GND VHVCO3 UVCO3 Uhfout GND 12VCO3 GND VCO BoardJ302 to RF unit OUT 12VCOOUTQ354 Block Diagram ANT LPF HPF AMP Mode Xtal BPF PDA2, CK AMPTX/RX Frequency TX/RX BuffANT Buff HPF LPF YGR ResetMode Xtal Initial BPF MOD TX/RX FrequencyLogic Unit Section Voltage DiagramWFM NTCCF20124AH 473KCT TXC 2NDLOOscin Mixin Oscout GND Mixout REC VCC DET Ifin Rssi DEC Ifout Filout QuadCOM4 COM3 COM2 COM1 12VCO COM2 ResetCOM3 COM2 Reset Power Clonein VCC VIN Cpuhv1200M RF UnitVHF 400M400MHz 50M00M 1200MHzLOK GND2 GND1PLST1 IN1 ENB VCC2Icom America Inc Icom Inc 5566I-S