JVC MXJ-300 Service manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-J300

RM-SMXJ300V REMOTE CONTROL

CLOCK TIMER

–+

4 5 6

ECHO

7 8 9

10+10

REC PAUSE

SHIFT

SOUND

MODE

MX-J300

A U US UT UP UY UZ

STANDBY

COMPACT

DIGITAL AUDIO

PLAY & EXCHANGE

1 BIT

DUAL D/A CONVERTER

2 3

SELECT

SLEEP

SET

AUX

FM MODE

FM/AM

PLAY MODE

CD3CD2CD1

C D

/CLEAR

TAPE

A – TAPE - B

ACTIVE

VOLUME

BASS EX.

PHONES

PANEL OPEN / CLOSE

TAPE

MIC LEVEL

MIN MAX

AUX

MIC

EJECT

PLAY

FULL - LOGIC CONTROL

MX-J300

POWERED ROLLING PANEL

AUTO REVERSE

VOLUME

–

FM /AM

EJECT

REC/PLAY

Area Suffix

Australia

Other Areas

Singapore

Taiwan

Korea

Argentina

Production country mark

COMPACT

DIGITAL A UDIO

Contents

Safety Precautions Important for laser products Preventing static electricity Disassembly method Adjustment method

1-2 1-3 1-4 1-5 1-24

Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs

1-27 1-28 1-28 1-29

No.20864

Aug. 2000

Main section

MX-J300

J301 AUX-L

L301

CN301

CN307

1 2

4 5

7 8 9

1 2 3 4 5

AUX-R

C319

16V1000

R357 4.7K

ECHO

F.B

C203 50V1

C103 50V1

L303 10uH

D311

1SS133

R358

4.7K

C301 1000P

FLAME GND

REC-L

A.G REC-R PB-L

A.G

PB-R SW9V

M.B

SHEET 4/6

M.G

To CASSETTE UNIT

MIC A.G

ECHO

D.G

To Mic-Amp,

SHEET 6/6

R101 39K

C101

100P

C201

100P

R201 39K

1N4003

D312

C358 16V22

R102 6.8K

R202 6.8K

C209 25V4.7

50V1

R359 220

C359

MIC

VCC

LOUT

R360

R362

C361 50V1

R361 10K

C17 12P

R17 1.5K

L2 AM BLOCK COIL

ANT-TERMINAL

FLAME GND

C65 10P

J302

L10 2.2uH

AM GND GND

1SS133D31SS133

1SS133

LC1 BPF

D8 1SS133

C4 0.01

C15 10P

R15

C14 0.047

C16

0.047

OUT

GND

100K

1SS133

C1 0.01

D2 1SS133

C20 0.01

C5 0.01

C19 10V100

D5 SVC203

R70 100K

R19 470

L8 100uH

C49

0.01

R1 100K

CF1 10.7MHz

C3 0.001

4.7P

R2 47K

IC1 TA2104BN

3.5T

L1 FM-RF

C18 0.01

T2 VQT7A21-111

Q1 2SC1923(O)

C12 0.01

R12 470K

R13 56

R11 330

R71 47K

D6 SVC203

C22 0.001

RFVCC

AM_RFIN

FM_RFOUT

AM_FIL3MIX_OUT4VCC5AM_IFIN6FM_IFIN

FM_RFIN

RFGND

R14 330

C13 0.01

C21 12P

C109 25V4.7

C151

25V10

FK4TK

22K

2.5T

L6 FM-OSC

R72 22

FM_OSC

AM_OSC

C36

CF2

10.7MHz

C102 50V1

C202 50V1

LIN

C362 0.33

D9 1SS133

D10 1SS133

OSC_OUT

C35

0.01 +

10V100

C33 0.0015

C34

JP101

BIAS

ST_IND

C363 0.068

10K

R26

50V1

C360 25V10

GND

RIN9LP10LP11LP12ROUT13A14B15C

IF_REQ

GND8AGC

BA3837

IC351

C251 25V10

R18 100

DET_OUT

C108

25V4.7

C208 25V4.7

JP201

Q351 DTC114YS

C29 0.0068

C27

25V4.7

R21 3.3KR16

MPX_IN

LPF2/M_ST

QUAD

R_OUT

CF3 CDA10.7MG80A

25V10

C37

C210

0.082-M

KOK

DTC114YS

C25

330P

LPF1/BAND

L_OUT

DTC114YS

C39 0.015-M

C38 0.015-M

C41

50V2.2

+ +

C40

50V2.2

C211 0.082-M

C30 50V1

C31 0.1

DTC114YS

C64

1000P

C32 0.1

1 2 3

6 7 8

10 11

12 13

0.082-M

R209 5.6K

R23

5.6K

R22

5.6K

IC301 TDA7442D

RIN3 RIN2 RIN1 LIN1 LIN2 LIN3 LIN4 MUXO-L IN(L) MUXO-R IN(R) BIN(R) BOUT(R) BIN(L)14BOUT(L)

C110

D11

1SS133

5.6K

R109

C104 50V1

RIN4 LOUT ROUT AGND

CREF

SDA

SCL DGND TRE(R) TRE(L)

PS1

C111

0.082-M

1000P

R24 2.2K

D12 1SS133

R235

R234 10K

Q309

R912

470

D910 MTZ6.2J

10K

R315 2.2K

C318 16V22

PCNT

C915

R242 10K

C328

0.01

C323 0.01

C324 10V220

C325 0.01

50V22

+8V

RY301 12V

R321 10

R322 15

-35V

C205

R241

C228

25V4.7

+8V

2SC945

D309

PRT

50V1

M.GND

Q310

R323 2.2K

D308

1SS133

R236 1K

R136 1K

Q305 DTA114ES

Q306

DTA114ES

C904

C906

50V3300

C905

50V3300

0.1

C908

R901 4.7K

C911 25V4700

C910 0.1

D907

MTZ33J

0.01

C914

C916 25V10

D908

MTZ6.2J

D909 1SS133

F.B

L302

R141 1K

C128

25V4.7

OUT.L

OUT.R

A.GND

D.GND

M.GND

SHEET 5/6

D307 1SS133

Q311 DTC114ES

C322

D305

1SS133

0.068-M

C903

0.068-M

D903

1N4003

D905

1N4003

C913

50V22

R903

2.2K

Q901

2SA934

R142 10K

R332 220

BU5V

D.GND

MRESET

R324 10K

25V10

SMUTE

D901

TS6B02G

C902

0.068-M

D902

1N4003

D904

1N4003

C912

D906

1N4003

R904 100

R905 R906

50V1

C105

C320 10V100

R330 220

R331 220

MCS

MCLK

MRDY

SPK

63V47

R902

100 10K

C364

0.01

C321

0.01

11421531641751861978910111213

MSTAT

C901

C907 0.1C909 0.1

150

R327

R329 220

CN303

MCMD

1 2 3 4

0.068-M

1 2 3 4 5 6 7 8 9

100 1/4W UNF.F

L304 F.B

Q312

2SC3576

220

R328

J303

CN302

CN901A(1/2)

CN901B(2/2)

SP-L + SP-L SP-R SP-R +

SW L GND R

S1 S1-GND S1 S2 S2 S3 S3 S4 S4

SPEAKER OUTPUTTo HEADPHONE

SHEET 6/6

To SECONDARY

MAIN signal TAPE P.B. signal

AM signal

FM / TUNER signal CD signal

Q102 2SC2785

R116 10K

R112 6.8K

120K

MTZ5.1J

R54 1.8KR55 4.7K

R62

SDI

567

R212

R342

C330 25V4.7

R340

R341

VCC

R281

10K

C215 10V100

6.8K

Q202

2SC2785

820

R343 10K

220

C26 470P

C56 0.01

FMIN

AMIN

IC2 LC72136

R67 22K R58 10K

R68 1K

R69

R63 47K

R111

1.2K

C115 10V100

R115

2.2K

10K

R181

123

IC303

VCC

R215

2.2K

R211

1.2K

R216 10K

D316

1SS133

R344 100K

4.7K

R57 330

R56

IFCNT

IFIN

C113 0.12-M

C213

C309 16V47

0.12-M

26 25

C308 0.01

C306

C307

23 22 21 20 19 18 17 16 15

C204 50V1

C43

C42

R25

2.2K

10V22

C212

0.0056-M

C112

0.0056-M

DTA114YS

C44 1000P

C304 0.0012-M

C230

R251

100P

C305 0.1-M

50V1

C130

22K

R151

C329 50V1

R336 1K

C53 50V47

C51 12P

R51 1K

C52 12P

L9 F.B

R110 2.7K

R114 2.2K R113

C114 0.1-M

C310 10V100

R304 47

C214

0.1-M

R302 1K

R303

R213 120K R214 2.2K

R210 2.7K

VCK

VDATA

D301

R334 1K

50V1

15K

R339

Q314

2SC2785

Q313

2SC2785

390

R338

R337

100K

C54 1-TF

C55

0.0039

R52 3.3K

R53 4.7K

LPFI

GND

LPFO

XTI1FM2CE3DI4CLOCK5DO6VCOSTOP7AM/FM8LW9MW10SDIN

VCX5044-001

R60 1K

R61 1K

R59 1K

C62

100P

C63

MPX

SCK

SDO

TUCE

BA15218

D314

1SS133

C57 0.01

C331 50V1

C59

10V100

1000P

R27 10K

D303 1SS133

C117 25V4.7

R117 2.2K

R217 2.2K

C217 25V4.7

D302 1SS133

C313

16V47

470

R308

R307 22K

C118

25V4.7

R118

4.7K

Q103

2SD2144

R119 10K

R219 10K

Q203

2SD2144

R218

4.7K

R306 10K

C312 25V4.7

AHB

LVL

IN 2

NF 2

SUB G

PRE-VSS

OUT 2 -

OUT 2 +

STK402-120

VSS

VCC

IC304

OUT 1 -

OUT 1 +

BIAS

PRE-VCC

N.C

NF-1

IN-1

C218

25V4.7

D315 1SS133

(J/C/E= 13-Pin Ux=15-Pin)

10K

R140

C311 16V47

R305 220

R240 10K

Q301 2SC2785

C58

0.001

L51

220uH

C60

R326 3.3K

470P

C119

470P

C219

R325 6.8K

56K

R120

C120

220P

R126

0.1-2W UNF.MF

0.1-2W UNF.MF R125

R226

0.1-2W UNF.MF R225

0.1-2W UNF.MF

D318

R335 10k

C223 10P

C220

220P

R220

Q916

2SC2785

C923 16V100

R121 680

C122

0.018-M

10P

R123 82K

C123

D317 1SS133

1.5K

R224

1SS133

82K

R223

C222

0.018-M

R221 680

56K

Q915 2SB1375

R918 6.8K

C922

D916 MTZ9.1J

100K

R333

114215345678910111213

CN305

FL1

-35V

50V100

R124

R222 100K

25V10

FL2

C121 50V47

R122 100K

C221 50V47

C124

1.5K

C224

50V100

C921

R227

16V100

C925 10V22

C327 0.01

SDO

Q304

DTC114ES

Q302

Q104 2SA1175

150-1/4W

Q907 2SB1375

Q911

2SC2785

D912 MTZ13J

C920 25V10

D914 1SS133

SDI

SCK

VCK

TUCE

R309 100K

2SC2785

R138 1K

Q204

2SA1175

R239 10K

DTC114YS

D913 MTZ12J

PCNT

Q913 2SA1175

MPX

SFTY

VDATA

To CTRL P C BOARD To CD UNIT

SHEET 3/6

R312

R311 47K

10K

R310 22K

R127

L101 5uH

R128 22 R129 22

L201 R228 R229 22

R238 1K

R139 10K

R914 1 R915 1 R916 1

R917 1K

Q909 DTA114TS

Q912

R928 33

Q914 2SC2785

R931 1K

114215345678910111213

N.C

LVL

FTU

AHB

(KOK)

(ECHO)

To CTRL P C BOARD

SHEET 3/6

Q303

2SA1175

150-1/4W

5uH

C125

0.1-M

C126

0.1-M

R150

R13022R250

Q908

2SA1175

DTC114TS

100K

R930

C924 16V47

PRT

SPK

PCNT

SMUTE

Q910

R929 2.2K

MCLK

MRESET

R131 10K

10K

R134

R132

390 UNF.C

R232

390 UNF.C

R137 100K R237

C225

C226

R230

R913 470

MRDY

MCMD

MSTAT

R231 10K

2SD2144

0.1-M

M.G

Q105

D304 C314 25V10

10K

R135

Q106 2SD2144

R133

390 UNF.C

R233 390 UNF.C

100K

Q307

2SC2785

R908

2.2-1/4W UNF.F

Q904

R909

2SB1375

47K

D911

MTZ5.6J

D915 C919 10V100

Q903 DTC114YS

INH

R907 1K

C326

1000P

CN304

1SS133

Q308

2SC2785

C381

0.022

Q905

2SC2785

R910 22K R911 6.8K

MTZ6.8J

Q902 DTC114YS

R314 470K

C315 50V1

R313 470

Q206 2SD2144

Q205

2SD2144

C316 16V47

R316 100K

2SC2785

Q906

2SC2785

0.01

C918

C917 50V2.2

MIC signal

Parts are safety assurance parts. When replacing those parts make sure to use the specified.

ABCD E F G

SHEET 2/6

2-3

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