JVC AV DV75 Service Manual

BLOCK DIAGRAM

FM

AM

TUNER BLOCK

PLL

IC721

LC72131D

IF/DET MPX

IC771

LA1837

STEREO

TUNE/IFC

PLL-CE

TM-BASS

DATA(M)

CLK(M)

TUNER L

TUNER ON

TUNER ON

MAIN C.B

OSD/KEY CON
C.B

PHONO

J501(1/2)

CD

AUX

J502

J901(1/2)

VIDEO 1

DVD/MD IN

J902(1/2)

VIDEO 2
LD/TV IN

FUNCTION

IC502(1/2)

BU4052BCF

PHONO EQ

IC501(1/2)

NJM2068MD

MIC AMP

IC601(1/2)
NJM4558

B

FUNCTION

IC503

M62445AFP

L OUT

TUNER
PHONO
CD

L-CH

L-CH

L-CH

AUX
VIDEO

DATA(M)

CLK(M)
STB(M)

R OUT
VR IN (L)
VR IN (R)

J501(2/2)

TAPE

MONITOR

J901(2/2)

VIDEO 1

DVD/MD IN

J902(2/2)

VIDEO 2

LD/TV IN

J501

VIDEO 3

AUDIO IN

VIDEO 3

VIDEO IN

VIDEO C.B (1/2)

J904 (1/2)

VIDEO 1

DVD OUT

J905 (1/2)

VIDEO 2

LD/TV OUT

J904 (2/2)

VIDEO 1

DVD/MD OUT

J905 (2/2)

VIDEO 2

LD/TV OUT

Q902

Q903

J903 (1/2)

MONITOR

VIDEO OUT

Q901

Q904-907

J903 (2/2)

MONITOR

REC OUT

REC OUT SW

IC902(1/4,2/4)

BU4066BCF

REC OUT

CONTOROL

VIDEO SW

IC901

BA7625

AV-A

AV-B

AV-A
AV-B

AV-A

AV-BAAV-B

REC OUT-L

MIC MIX OUT-L
MIC MIX OUT-R

TAPE MONITOR

BBE1

BBE2

AC3 KARAOKE

K-CON

K-CON

TAPE MONITOR SW

IC701(1/2)
TC4053BF

FL-CH

FL-CH

R-CH R-CH

STB(M)

CLK(M)

DATA(M)

BBE

IC601

BA3880S

LEVEL

CONTROL

D601,602

IC101(1/2)

NJM4558MD

Q401

MUTE

MUTE

Q721

Q301

MUTE

SURROUND VOL

IC145(1/2)
M624396P

SURROUND

L AMP

CENTER

AMP

Q402-417,

420,421,440

Q303,305,307,309,

311,313,315,317

Q201

MUTE

Q203,205,207,209,

211,213,215,217

B

A

S292(1/2)

S291(1/2)

OFFON OFFON

VIDEO C.B (2/2)

PHONES

J603

SW401

FUNCTION

A

FRONT

SPEAKERS

4Ω/8Ω

B

SURROUND

SPEAKER

8Ω

CENTER

SPEAKER

4Ω/8Ω

J715

L

R

J715

SUPER

WOOFER

SW102
MULTY

SW101

VOLUME

JOG2

JOG1

KEY

MATRIX

KEY

MATRIX

KEY

MATRIX

S101,
S102,103
S107-109
S111,113

S110,112,114-116

RE

KEY2

KEY1

LED DRIVER

IC101,102

BU4049BLF

DISPLAY

FL101

FRONT C.B

AC IN

D002-004

VS

PT C.B

SPKR C.B

FIL1
FIL2

+VH

-VH

+VL

+VL

-VL

-VL

D107

D108,109

D121

S101

Q110

RY102

RY101

4Ω

8Ω

VM

VM

REG

Q105
Q106-109

-VFL
REG

Q118

-VCC
REG

Q101,
Q102,
Q999

+VCC

REG

Q103

MUTE

Q112,113

2 TIMES

DET

Q117

Q114,115

RESET

Q116

-VFL

HOLD

VM

+VCC

-VCC

FRONT/

SURROUND/

CENTER

AMP

FIL1
FIL2

SYNC DET

Q106

VD

POWER

AC

DET

RDS

IC851*6

BU1920FS

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

JR905

MIC C.B

SL-CH

C-CH

SW-CH

CONT1

TUNER
PHONO
CD

R-CH

R-CH

R-CH

R-CH
R-CH

AUX
VIDEO

FR-CH

FR-CH

SURROUND

MODE SELECT

IC651(2/3)
TC4053BF

KEY

CONTROL

IC650

M65847AFP

Q651

CENTER VOL

IC146(1/2)
M624396P

S-WOOFER VOL

IC146(2/2)
M624396P

CONT2

GRAPHIC

EQUALIZER

IC701

M62431AFP

GEQ C.B

STB-31

CLK(M)

DATA(M)

FL-CH
FR-CH

FL-CH

FR-CH

FR-CH,
SL-CH,
SR-CH,
C-CH

FR-CH

FR-CH

FR-CH

FR-CH

FR-CH

FRONT

L AMP

µCON

IC103

µPD780028GF-027-3BA

Q111

B

A

SR-CH

S292(2/2)

S291(2/2)

OFFON OFFON

A

B

L

R

J201
J901

J301
J902

Q001

VS

REG

Q002,003

JW403

JW424

JW445

MUTE

FR-CH

HOLD

FR-CH

SR-CH

Q228
+REG

Q219,221,222

+REG

SR-CH

Q319,321,322

+REG

FR-CH

Q220,225,226

-REG

SR-CH

Q320,325,326

-REG

RY001

PT101

T.F

F102

F101

SW101

120V

|

220V-230V

|

240V

Q227

MUTE

SR-CH

Q327

MUTE

Q418

HOLD

DET

Q240

SR-CH

HOLD

HOLD

DET

Q340

OVERHEAT

DET

Q223,224

SR-CH

OVERHEAT

DET

Q323,324

HOLD

HOLD

DET

Q440

OVERHEAT

DET

Q414,415

S401,402

KEY

MATRIX

S403

MIC1

J601

MIC2

J602

DELAY AMP

IC601(2/2)

NJM4558

DELAY

MIX

Q601

STEREO

TUNE/IFC

PLL-CE

TM-BASS

DATA(M)

CLK(M)

STB(M)

STB-31

DSP-CE

C42-CS

TAPE-ATT

C42-CDOUT

CDIN

SCK

C49-CS

INTREQ

C49-CDOUT

C49-RESET

DSP SW

POWER

CONT1

CONT2

MUTE

MIC

Q107,109

BIAS

HOLD

MIC

RESET

RESET

Q111

SCAN

Q113

MUTE

Q119

MUTE

Q119

P13

P14

P13,14,20-30

P1-35,G1-11

K-SCAN

PT002

DIGITAL

INPUT

VIDEO 2

J101

DOLBY DIGITAL C.B

IC115

GP1F37R

(COAXIAL)

VIDEO 1

(OPTICAL)

IC122

GP1F37R

VIDEO 3

IC118

TC74HCU04

SURROUND
SOUND CODEC
A/D,D/A CONV.

IC102

CS4226

IC104

NJM2068MD

ADO/CS

DOLBY AC-3

PROLOGIC

DECODER

IC101

YSS248

CLOCK

SW

IC121

TC74HC00AF

X101

10MHz

PORT1~5

5

SD0~2

3

SDI0

OVL/ERR

SDA

SCK

SI

CS

SCK

SO

SI

A
B
C

IC105(1/2)

NJM2068MD

IC107(1/2)

NJM2068MD

SUB WOOFER

ON/OFF SW

IC108

TC4053BF

ABC

CENTER SW

IC109

TC4053BF

ABC

IC107(2/2)

NJM2068MD

Q401~403

IC111

NJM2068MD

IC113

NJM2068MD

IC112(2/2)

NJM2068MD

IC110

NJM2068MD

IC112(1/2)

NJM2068MD

DSP/

ECHO

IC117

M65849BFP

CLK

DATA

DSP-CE

SURROUND

MODE SELECT

IC119

TC4053BF

R-CH

IC120

NJM2068MD

IC106

NJM2068MD

-VL

R-CH

IC116

SELECT

SW

KARAOKE

F-L

F-R

IC114

IC114

(1/2)

(2/2)

1211

WIRING-1 (MAIN)

1

A

B

C

D

234567

8

9

10

11 12 13

14

E

F

G

H

I

J

K

1413

SCHEMATIC DIAGRAM-1 (MAIN 1/2)

1615

WIRING-2 (SPKR) SCHEMATIC DIAGRAM-2 (SPKR)

1

A

B

C

D

234567

E

F

G

H

I

J

K

1817

SCHEMATIC DIAGRAM-3 (MAIN 2/2)

2019

WIRING-3 (FRONT)

1

A

B

C

D

234567

8

9

10

11 12 13

14

E

F

G

H

I

J

K

2221

SCHEMATIC DIAGRAM-4 (FRONT)

VDD

2423