JVC CXJT-8 Service manual

CX-JT8

SECTION 4

TEST MODE

[COLD RESET]

• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press three keys of x , [ENTER] and [POWER] simultaneously.

3. The message “RESET” is displayed on the fluorescent indicator

tube momentarily, then becomes standby states.

[TUNER STEP CHANGE-OVER]
(Except AEP, UK and CIS models)

•A step of AM channels can be changed ov er between 9 kHz and
10 kHz.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [TUNER BAND] key to select “AM”.

3. Press the [POWER] key to turn the power OFF.

4. Press two keys of [ENTER] and [POWER] simultaneously.

5. The message “9K STEP” or “10K STEP” is displayed on the

fluorescent indicator tube, and thus the channel step is changed
over.

[CD SHIP MODE]

• This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Press two keys of [CD] and [POWER] simultaneously.

4. The message “LOCK” is displayed on the fluorescent indicator

tube, and the CD ship mode is set.

[CHANGE-OVER FUNCTION OF MD/VIDEO]

• This mode is used to enable function of external input to change
over between MD and VIDEO.

Procedure:

1. Set to standby state.

2. Press two keys of [MD VIDEO ]

3. The message “MD” or “VIDEO”is displayed on the fluorescent

indicator tube, and the function of external input is changed
over.

)(

and [POWER] simultaneously.

[CD TRAY LOCK MODE]

•This mode is used to unable to take sample disc out of tray in
the shop.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. While pressing the x key, press the Z key for 5 seconds.

4. The message “LOCKED” is displayed on the fluorescent

indicator tube and the tray is locked. (Even if pressing
the Z key, the message “LOCKED” is displayed on the
fluorescent indicator tube and the tray is locked)

5. To release from this mode, while pressing the x key, press

the Z key for 5 seconds.

6. The message “UNLOCKED” is displayed on the fluorescent

indicator tube and the tray is unlocked.

[AMP TEST MODE]

•This mode is used to set the parameter of AMP IC for adjustment
of tone quality and VACS level and display VACS status.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press three keys of x , [HEAVY] and [HIP POP] simultaneously.

3. When the AMP test mode is activated, the message “AMP

TEST” is displayed on the fluorescent indicator tube
momentarily.

4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously, mode is changed over to parameter setting of
AMP IC and display of VACS status.

5. When the VACS ON, the message “V2255255” is displayed on

the fluorescent indicator tube, and when the VACS OFF, the
message “2255255” is displayed on the fluorescent indicator
tube.

6. Press the

7. Press the [ENTER] key, surround ON/OFF is changed over.

8. Press the [MANUAL] key, EQ band is changed over to LOW,

MID or HIGH.

9. Press the [HIP POP] and [TECHNO] key, EQ curve adjustment

value is changed over between –8dB to +8dB.

10. To release from this mode, press two keys of [HEAVY] and

[VOCAL] key, DBFB ON/OFF is changed over.

[TECHNO] simultaneously.

18

CX-JT8

[AGING MODE]

• This mode can be used for operation check of CD section and
tape deck section.
CD section and tape deck section work in parallel.

If an error occurred:

The aging operation stops only an error occurred sections and
display then status.

If no error occurs:

The aging operation continues repeatedly.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Set disc on the tray and set tape into the deck.

4. Set the “ALL DISCS” mode and “REV OFF” mode.

5. Press three keys of x , [HEAVY] and [DISC CHANGE/DISC SKIP]

simultaneously.

6. The message “AGING” is displayed on the fluorescent indicator

tube momentarily, then aging operations of CD and tape are
started at the same time.

7. To release from this mode, operate the “COLD RESET”.

1. Display at the Aging Mode

Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.

2. CD Section

The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.

Aging mode sequence (CD section) :

3. Tape Deck Section

The sequence during the aging mode is following as below.
If an error occurred, stop display that step.

Aging mode sequence (tape deck section) :

Rewind the tape A and B

“AAG-1 or 2”

Shut off

FWD play the tape A

“AAG-3”

2 minutes

Fast forward the tape A

“AAG-4”

Shut off or 20 seconds

REV play the tape A

“AAG-5”

2 minutes

Rewind the tape A

“AAG-6”

Shut off

FWD play the tape B

“BAG-3”

Start (from disc 1)

Disc chucking

TOC read

Play first track for 2 seconds

Play last track for 2 seconds

EX-change open/close

Open the disc tray

Disc skip

Close the tray

Change the next disc.

2 minutes

Fast forward the tape B

“BAG-4”

Shut off or 20 seconds

REV play the tape B

“BAG-5”

2 minutes

Rewind the tape B

“BAG-6”

Shut off

Note: “*AG-*” is display of each step.

19

CX-JT8

[GC TEST MODE]

• This mode is used to check the fluorescent indicator tube, LED
and key.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously.

3. Fluorescent indicator tube and LEDs are all turned ON.

4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously, mode is changed over.

5. In the key check mode, press each key, the def ined k ey number

of every each key list is displayed on the fluorescent indicator
tube.

6. In the key count check mode, “K-CNT 0” is displayed on the

fluorescent indicator tube. Each time a key is pressed, “K” value
increases. However, once a key is pressed, it is no longer taken
into account.

7. In the headphone input check mode, connect the headphone,

the message “H_P ON” is displayed on the fluorescent indicator
tube, and disconnect the headphone, the message “H_P OFF”
is displayed on the fluorescent indicator tube.

8. In the volume check mode, turn the [VOLUME] knob, the

display on the fluorescent indicator tube is changed over to
“VOL UP”, “VOL FLAT” or “VOL DOWN”

[MC TEST MODE]

•This mode is used to check operations of Amplifier.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 3]

simultaneously.

3. When the MC test mode is activated, the message “MC MODE”

is displayed on the fluorescent indicator tube momentarily, then
VACS level is displayed on the fluorescent indicator tube.

4. Press the

indicator tube is changed over to “EQ MAX”, press the

[TECHNO] key, the display on the fluorescent

[MANUAL] key, the display on the fluorescent indicator tube is

changed over to “EQ MID”, press the [HIP POP] key, the
display on the fluorescent indicator tube is changed over to “EQ
MIN”,

5. Turn the [VOLUME] knob, the display on the fluorescent

indicator tube is changed over to “VOL MAX”, “VOL MID” or
“VOL MIN”

6. Press the [ENTER] key, VACS ON/OFF is changed over.

7. When the [REC PAUSE/START] key is pressed with a tape set

in the deck-B, the function is switched “MD” or “VIDEO” and
recording starts. When the m or M key is pressed during
recording, the tape is rewound back to the beginning of
recording, the function is switched to “T APE B”, then playback
starts.

8. When the [CD SYNC] key is pressed with the test tape (AMS-

100, AMS-110A) in the deck, number of space between tunes
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.

9. To release from this mode, press the [POWER] key.

[MODEL, DESTINATION AND VERSION DISPLAY]

• This mode is used to check the model, destination and software
version.

Procedure:

1. Set to the standby state.

2. Press three keys of x , [TECHNO] and [HEAVY] simultaneously.

3. When the model, destination and version display mode is

activated, the model an destination is displayed on the
fluorescent indicator tube.

4. Press two keys of [HEAVY] and [DISC DIRECT PLAY 2]

simultaneously, mode is changed over to model and destination
display mode and version display mode.

5. In the version display mode, press the [DISC DIRECT PLAY 3]

key, display is changed over to version display and year, month
and day of the software creation display.

6. To release from this mode, press the two keys of [TECHNO]

and [HEAVY] simultaneously.

[CD ERROR CODE DISPLAY]

• This mode can be used for error display of CD section.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Press three keys of x , [HEAVY] and [DISC DIRECT PLAY 1]

simultaneously.

Note: Error code is not displayed on the liquid crystal display.

[CD SERVICE MODE]

•This mode can run the CD sled motor freely. Use this mode , for
instance, when cleaning the optical pick-up.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the

3. Press three keys of x , [HEAVY] and Z simultaneously.

4. When the CD service mode is activated, the message “TRVS

ON” is displayed on the fluorescent indicator tube.

5. Press the M key, optical pick-up move to outside track and

the message “SLED OUT” is displayed on the fluorescent
indicator tube.

6. Press the m key, optical pick-up move to inside track and

the message “SLED IN” is displayed on the fluorescent indicator
tube..

7. Press the [TECHNO] key, traverse ON/OFF is changed over.

[CD] key to select “CD”.

[5 REPEAT LIMIT CANCEL]

• Number of repeat for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode is used to enables CD to repeat
playback for limitless times.

Procedure:

1. Press the [POWER] key to turn the power ON.

2. Press the [CD] key to select “CD”.

3. Press three keys of x , [HEAVY] and Y simultaneously.

20

p

p

SECTION 5

ELECTRICAL ADJUSTMENTS

CX-JT8

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment. Therefore,
check each item in order given.

2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.

S-CURVE CHECK

Oscilloscope

BD board

TP(FE)
TP(VC)

Procedure :

1. Connect an oscilloscope to TP (FE) and TP (VC).

2. Turn the power on.

3. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)

4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 3 ± 0.5 Vp-p.

Note: Clear RF signal waveform means that the shape “ ◊ ” can be clearly

distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500ns

±

level : 1.3

0.3Vp-

Connecting Location: BD board

– BD Board (Conductor side) –

S-curve waveform

symmetry

A

±

within 3

B

Note: •Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

•Take sweep time as long as possible and light up the
brightness to obtain best waveform.

0.5Vp-

RF LEVEL CHECK

BD board

TP(RF)
TP(VC)

Procedure :

1. Connect an oscilloscope to TP (RF) and TP (VC).

2. Turn the power on.

3. Load a disc (YEDS-18) and playback.

4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.

oscilloscope

TP (VC)

TP (RF)

TP (FE)

IC721

2121

CX-JT8

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM – CD Section –

A

DETECTOR

A

D

C

B

E

F

LASER DIODE

PD

D

C

I-V AMP

B

E

F

LD

LD

PD

AUTOMATIC

POWER CONTROL

Q701

RF AMP, FOCUS/TRACKING ERROR AMP,

DIGITAL SIGNAL PROCESSOR, DIGIRAL SERVO PROCESSOR,

FIN2

8

RF

PH, BH

A/D

CONVERTER

SERVO

PROCESSOR

D/A

CONVERTER

4

APC

TBAL

EQ,

AGC

RF AMP

FIN1

7

TIN1

9

TIN2

10

LDD

80

LDS

79

EFMIN

3

DIGITAL FILTER, D/A CONVERTER

ERROR

CORRECT

IC721

D/A

CONVERTER

EXTERNAL

AUDIO IN

SERIAL OUT

CLOCK

GENERATOR

LCHO

RCHO

ASDFIN
ASDACK
ASLRCK

DATA

DATACK

LRSY

EFLG

C2F

FSX/16MIN

16MOUT

XIN

XOUT

42

45

57
56
55

60
59
58

53
52
50

26MP3RES

54

49

48

16.9344MHz

X701

R-CH

2 ADDATA
3 ADBCK
4 ADLRCK

79 DATAIN
80 DATACK

1 LRSY

5 C2FIN
9 CKOUT

78 RESB

7 CKIN

73 CMDOUT
74 CMDIN
75 CL

MP3 DECODER

IC801

CE

76 66

MDATA0

– MDATA15

MADRS0

– MADRS8

FSYNC

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: CD PLAY

IC802

MEMORY

2-5, 7-10,

I/01 – I/016

23-30, 33-4060-53, 50

31-34, 36-39

A0 – A8

16-19, 22-26

27 OE45OEB
13 WE42WEB
14 RAS41RASB
29 LCAS43CASLB
28 UCAS44CASUB

MUTING

Q311

R-CH

MUTING CONTROL

SWITCH

Q312

CD-L

A

(Page 24)

OPTICAL PICK-UP

BLOCK

(KSM-213DCP)

2-AXIS
DEVICE

(FOCUS)

(TRACKING)

S701

(LIMIT)

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

IC722

VO3(+)

18
17 VO3(–)

11 VO2(+)
12 VO2(–)

FOIN

20TIN

10

70 LIMIT SW

TDO

FDO23SLDO22SPDO25CONT4

20

21

COMMAND
INTERFACE

*WRQ

72CD MUTE

106

DO

64

DI

63

CL

62

CE

61
65

67DRF
66*RES

99 I-LC78646/LC78684 DI
98 O-LC78646/LC78684 DO

100 O-LC78646/LC78684 CLK

5O-LC78646 CE

85 I-WRQ

86 I-CD DRF

4O-LC78646 RESET

SYSTEM CONTROLLER

IC901 (1/2)

M751

(LOADING)

M

O-LC78684 CE

I-LC78684 SYNC

I-BU IP DOWN/

CD OPEN CLOSE

LOADING MOTOR DRIVE

IC701

4 OUT1

2 OUT2

1O-SYS-MUTE
94O-POWER RELAY
29I-HOLD

11RESET
27I-POWER DOWN

96I-CD NUMBER SENS

22

7FIN

9RIN

S-MUTE

O-POWER

HOLD

RESET

POWER DOWN

LEVEL SHIFT

Q731

+

LM-F

LM-R

OPEN

CLOSE

ROTARY

ENCODER

S711

TABLE ADDRESS

S-MUTE,

O-POWER, HOLD

POWER DOWN

SENSOR

IC731

DISC TRAY

ADDRESS DETECT

S751

OPEN/CLOSE

DETECT

LM-F, LM-R,

TM-F, TM-R

RESET,

B

C

D

(Page 24)

(Page 24)

(Page 23)

M701

(SLED)

M702

(SPINDLE)

M

M

26 VO4(+)

27 VO4(–)

2 VO1(+)

1 VO1(–)

25SLIN

M741

M

(TABLE)

3SPIN

7LDS

TABLE MOTOR DRIVE

IC712

4 OUT1

2 OUT2

TM-F

7FIN

TM-R

9RIN

2222

6-2. BLOCK DIAGRAM – TUNER/TAPE/PANEL Section –

L-CH

HP1
(PB)

(DECK-A)

HRPE1

(REC/PB/ERASE)

(DECK-B)

FM 75Ω

(COAXIAL)

AM LOOP

(Page 24)

(Page 24)

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

R-CH R-CH

L-CH

R-CH R-CH

ERASE

ANTENNA

MIC, SA

E

HP

F

: TUNER (FM/AM)

: TAPE PLAY (DECK-A)

: TAPE PLAY (DECK-B)

: REC

R-CH

TUNER UNIT

FM ANT

AM ANT

MIC

SA

MUTING

Q219, 221

L-CH

R-CH R-CH

DI

DO

CLK

CE

TUNED

ST

TU-MUTE

RDS DATA

RDS INT

SPEANA AMP

Q201, 202

(FRONT PANEL KEY)

+3.3V (SUB)

VOLUME

BASS

MULTI JOG

TREBLE
MIDDLE

S301 – 309,

S311 – 331

REC ON/OFF

SWITCH

Q222, 225

BAND-PASS

FILTER

Q204 – 206

REMOTE CONTROL

RECEIVER

IC802

ROTARY

ENCODER

S801

ROTARY

ENCODER

S802

ROTARY

ENCODER

S803

ROTARY

ENCODER

S804

KEY ACTIVE

SWITCH

Q504, 505

BIAS OSC

L201

DI

CLK

+4V

REC BIAS

SWITCH

Q228

BIAS OSC

Q223

SYSTEM CONTROLLER

IC901 (2/2)

91 O-LC72121/M61529/BU2099 DO
87 I-LC72121 DI
92 O-LC72121/BU2099 CLK

9 O-LC72121 CE
88 I-TUNER TUNE
97 I-TUNER STEREO

(AEP, UK)

2 I-BU1924 DI

3 I-BU1924 CLK

(Except AEP, UK, CIS)

21 I-MIC/I-TU SIG

18 I-SPEANA L
19 I-SPEANA M
20 I-SPEANA H

76 I-HP MUTE

28 I-RMC

84 I-VOL A
83 I-VOL B

80 I-BASS A
79 I-BASS B

82 I-JOG A
81 I-JOG B

78 I-TRE A
77 I-TRE B

I-KEY1 –

I-KEY3

26 – 24

+9V

O-BU2099 LCK

O-M61529 CLK

S7/I-A-PHOTO

S6/I-A-MODE
S9/I-B-MODE

I-REC (FWD)

S10/I-REC (REW)

32

34

21

XT1

CF1

CF2

O-KEYSCAN

I-B-PHOTO

S8/I-A-HALF

I-B-HALF

S1 – S5,

S11 – S26

G2 – G11

DECK A/B SELECT SWITCH, REC/PB EQ AMP

IC201 (SUFFIX-11) IC201 (SUFFIX-13)

AIN (L)

BIN (L)

REC­OUT (L)

8

7

1312XT2

15

16

93O-POWER LED

95

48
52
49
53
47
54
50
55

41 – 45, 56 – 7131 – 40

S7/U5

S8/U6

S6/U4

S9/U10

S10/U11

EQ

X901

32.768kHz

X902

8.64MHz

POWER 1 STANDBY/ON

U8

U9

U7

EQOUT (L)

REC-IN (L)

MUTE-ON/OFF

REC MUTE-ON/OFF

LED901

B+

D603 – 610

S6 – S10

FLUORESCENT

INDICATOR TUBE

28 27

24

13

A/B

14
15

B+ SWITCH

Q921

FL901

MUTE

TAI (L)

MULTI CONTROLLER

IC309 (SUFFIX-11) IC309 (SUFFIX-13)

8

A/B

PB MUTE

9

10

REC MUTE

FRONT SPON/OFF

REAR SPON/OFF

LM-L (CD)
LM-R (CD)
TM-L (CD)

CLK

LCK

TM-R (CD)

S-OUT

LED201

CD

LED202

TUNER BAND

LED203

MD (VIDEO)

LED204

TAPE A/B

LED301

1

LED302

2

LED303

3

LED213

i-BASS

7 BIAS

6 REC

11 TUNER MUTE

DI

MCLK

+3.3V

DISC DIRECT PLAY

PB-OUT (L)

16
17

13
12
15
14

3DATA
4CLOCK
5LCK

18SO

CX-JT8

TAPE-L, REC-L

SP-F, SURR

LM-F, LM-R, TM-F, TM-R

TUNER-L

DI, SO, CLK, MCLK, LCK,

TAPE MECHANISM

DECK BLOCK

CAPM+

MM

(CAPSTAN/REEL)

A-SOL

(DECK-A)

B-SOL

(DECK-B)

A-PHOTO
B-PHOTO
A-HALF
B-HALF
A-MODE
B-MODE
REC (FWD)
REC (REW)

G

H

D

J

K

(Page 24)

(Page 24)

(Page 22)

(Page 24)

(Page 24)

15MANUAL

14HIP POP

13TECHNO

12SALSA

11VOCAL

10HEAVY

10

11

12

TAPE-L

REC-L

CAPSTAN/REEL

MOTOR DRIVE

Q601

PLUNGER DRIVE

(DECK-A)

Q602

PLUNGER DRIVE

(DECK-B)

Q603

LED211

MANUAL

LED210

HIP POP

LED208

TECHNO

LED207

SALSA

LED206

VOCAL

LED205

HEAVY

U5
U8
U6
U9
U4
U10
U7
U11

26

SP-F

SURR

LM-F

LM-R

TM-F

TM-R

SO

LCK

CLK

S-OUT

3 DATA
4 CLOCK
5 LCK

18 SO

6CD

7 TUNER

8 AUX

9 TAPE

LED DRIVER

IC201

3 DATA
4 CLOCK
5 LCK

18 SO

6 CD1

7 CD2

8 CD3

9 I-BASS

TAPE MECHANISM CONTROLLER

MOTOR

A-SOL

B-SOL

LED DRIVER,

IC202

2323

CX-JT8

6-3. BLOCK DIAGRAM – AMP/POWER SUPPLY Section –

(Except AEP, UK, CIS)

J401

MIC

MD (VIDEO)

(Page 22)

(Page 23)

(Page 23)

(Page 23)

(Page 22)

L

IN

R

A

J

G

K

C

JK302

CD-L

TUNER-L

TAPE-L, REC-L TAPE-L

DI, SO, CLK,
MCLK, LCK

RESET,
POWER DOWN

MIC LEVEL

MIC AMP

IC401 (1/2)

R-CH

AGC
Q401

REC-L

RESET

POWER DOWN

VR401

MIC MIXING

RESET SWITCH

D401

MIC AMP

IC401 (2/2)

MIC

2

MD-L

37

CD-L

40

TUNER-L

39

TAPE-L

38

1

INA

FREQUENCY

CONTROL

Q314 – 316

12 – 10

CTRL1 –

CTRL3

Q901

14

D402

INPUT SELECTSWITCH, TONE CONTROL,
ELECTRICAL VOLUME, BASS BOOST AMP

IC301 (SUFFIX-11) IC301 (SUFFIX-13)

29

TOUT

RECB-2

35

BASS BOOST ENHANCER

IC303 (SUFFIX-11) IC303 (SUFFIX-13)

VREF

BASS BOOST

ON/OFF SWITCH

BASS BOOST CONTROLLER

IC310 (SUFFIX-11) IC310 (SUFFIX-13)

3

SO

RESET SIGNAL

GENERATOR

MIC

BBE

7

Q323

9

I-BASS

DATA4CLOCK

5

LCK

CLK

IC502

+3.3V (SUB)

LCK

28

BASS BOOST

CONTROL

Q317 – 320

16 – 13

BB CTRL1 –

BB CTRL4

OUTA

13

D504

VOLIN2

GIN

6

BASS BOOST

+4V

SA

19

SAOUT

OUT2

DATA22CLOCK

21

MCLK

DI

CONTROL

Q492

+4V

REGULATOR

IC501

EVER+10V

MIC, SA

SWITCHING

Q18

R-CH

SWITCHING

Q17, 19, 22

VM+10V

CENTER VOLATAGE

GENERATOR

Q324

IC304 (SUFFIX-11) IC304 (SUFFIX-13)

25

FEED BACK

SWITCH

Q491

RECT

D902 – 905

BUFFER

IC304

R-CH

+

+1.8V

O-POWER

(MP3)

VCC

SUB POWER

TRANSFORMER

PT902

MUTING CONTROL

+1.8V

REGULATOR

IC803

B+ SWITCH

Q301, 302

MUTING

Q525

SWITCH

Q527

S-MUTE

DECK+9V, M+9V

PRE DRIVE

Q517, 519

R-CH

+3.3V (MAIN)

CURRENT

MIRROR

Q521, 523

CASCADE

Q511, 513, 515

D102

D513

REGULATOR

IC306

POWER OFF

MUTING DRIVER

Q529, 530

IC306 (SUFFIX-11) IC306 (SUFFIX-13)

D313 – 315

P+7V

VM+9V

VM+10V

+4V

R-CH

–VP

+VP

FINAL DRIVE

Q501, 503

BIAS

Q507, 509

OVER CURRENT

DETECT

Q13

VM+10V

REGULATOR

IC305 (SUFFIX-11) IC305 (SUFFIX-13)

REGULATOR

IC308 (SUFFIX-11) IC308 (SUFFIX-13)

REGULATOR

IC313 (SUFFIX-11) IC313 (SUFFIX-13)

TO

POWER AMP

BLOCK

VF1

TO

FLUORESCENT

INDICATOR TUBE

VF2

–VFL

R-CH

+9V

IC305

+9V

IC308

+10V

IC313

REGULATOR

OVER LOAD

Q533 – 536

DETECT

Q505

+

+

HOLD

Q12

+VH

–VH

+VL

–VL

–30V

R-CH

+VH

+VL

–VH

–VL

DC DETECT

RELAY B++9V

OUTPUT LEVEL

DETECT
Q20, 21

OUTPUT LEVEL

DETECT
Q23, 24

+

Q5, 6

+

HOLD

Q7 – 9

+

HOLD

RECT

D301 – 304

RECT

D319 – 322

RECT

RECT

POWER ON/OFF

RELAY DRIVE

THERMAL DETECT

Q10, 11

O-POWER

D1

D2

Q330, 331

R-CH

+

R-CH

MAIN POWER

TRANSFORMER

PT901

VM

VM

VH

VH

VL

VL

(Chilean, Peruvian)

RY901

RY902

Except

Chilean, Peruvian

TH501,

502

FAN MOTOR

ON/OFF SWITCH

Q327, 328, 372, 373

M731

M

(FAN)

+

R-CH

R-CH

RY501

RY502

R-ch is omitted due to same as L-ch.

SIGNAL PATH

R-CH

SURROUND SPEAKER
ON/OFF RELAY DRIVE

Q532

FRONT SPEAKER

ON/OFF RELAY DRIVE

Q304

S-MUTE, O-POWER, HOLD

: TUNER (FM/AM)

: CD PLAY

: TAPE PLAY

: REC

: MD (VIDEO) IN

: MIC INPUT

Except AEP, UK,

CIS, Australian

S901

AC VOLTAGE

VOLTAGE

SELECTOR

AEP, UK, CIS,

Australian

SURR

SP-F

SP-F,

SURR

(AC IN)

HP

J221

PHONES

JK503 (1/2)

FRONT

SPEAKER

JK503 (2/2)
SURROUND

SPEAKER

E

F

+
–

+
–

+
–

+
–

H

B

(Page 23)

(Page 23)

L

R

L

R

(Page 23)

(Page 22)

2424

6-6. SCHEMATIC DIAGRAM – BD Board – • See page 52 for IC Block Diagrams. • See page 52 for Waveforms.

CX-JT8

R732

F

0

R

R731

2.2k

R707

10

C709

C746 C708 R729

100

0.1 0.1 12k

0.0047

6.3V

C704

47

6.3V

R727C703

1000.1

S701

R708C710

10k0.047

TP

(RF)

TP

(VC)

TP

(FE)

TP

(TE)

R738

6.8k

SLCO

SLCIST

EFMIN

RF

RFVDD

RFVSS

FIN1

FIN2

TIN1

TIN2

VREF

REF1

FE

TEC

TE

RFMON

JITTC

ADAVDD

ADAVSS

TDO

D

LD

O

FD

0

R739

Q701

UP0411600SO

AUTOMATIC

C705

0.001

C723

100

6.3V

F

C

(LD)(PD)

E

C

C

D

C

V

N

V

G

C

D

A

B

N

CN708

16P

VC

VCC

E

D

A

B

C

F

GND

LD

VR

PD

F+

T-

T+

F-

100

R745

C714

0.1

C701

0.1

C702

100

6.3V

C706

0.1

POWER

CONTROL

(LIMIT IN)

C711

0.1

C712

47p

R702

15k

R703

R704

R705

R701

R706

C716

C715

C717

C718

C719

C720

15k

15k

15k

47k

47k

0.001

1 50V

0.0047

1

0.0047

100p

R709

27k

R711

330

C713

0.1

C721

C744

1

C743

0.047

R725R726

680680

R730

1.2k

T

S

D

FR

D

D

IS

L

V

K

V

C
P

C

4
T

A

O

O

N

D

D

P

O

LD

P

C

S

G

S

6.8k

0

R740

R741

R728

47k

E

1

2

S

T

O

O

S

U

V

D

D

V

P

P

M
_
D
C

RF AMP,

FOCUS/TRACKING ERROR AMP,

DIGITAL SIGNAL PROCESSOR,

DIGITAL SERVO PROCESSOR,

DIGITAL FILTER,D/A CONVERTER

LC78646E-E

6
T
N
O

G

S

T

E

/F

/C

C

R

K

K

E

3

C

C

F

P

E

B

B

D

M

S

S

R760

100

D

C753

47p

C754C742

47p0.1

C741

0.1

2

5

W

T

D

SS

N

S

V

D

O

V

IT

C

IM
L

IC721

I2

I1

Q

N

N

P

E

O

O

/*

S

M

M

F

V

C756

47p

I

S

O

Q

D

E

D

R

R

W

_

_

D

D

C

C

100

100

100

100

R718

R719

R716

R717

F

S

O

Q

R

E

D

R

D

W

*R

*

I3

I4

I5

N

N

N

O

O

O

SS

M

M

V

M

C722

0.1

L

E

C

C
_
D
C

R722

R721

1k

100

100

R720

1

C856

C823

I

L

E

D

C

C

DATA

DATACK

LRSY

ASDFIN

ASDACK

ASLRCK

16MOUT

EFLG

C2F

XVSS

FSX/16MIN

XIN

XOUT

XVDD

RVDD

RCHO

RVSS

LVSS

LCHO

LVDD

T
U

D

O

D

TEST

D

V

R823

100

C731

47p

C824

R824

47p

100

FB808

R829

0.1

100

R713

FB701

0.01

C733

0.01

C732

C729
220
10V

R747

33

R746

33

R825

100

R826

R827

R828

C830

C829

FB807

1M 15p

R765 C734

1k

16.9344MHz

R715

100

R714

100

C825

47p

100

100

100

22p

47p

C831

22p

X701

18p

C735

FB801

FB802

C811

0.1

C812

C810

1

0.1
R818

150

R817

3.3k

R819R820

1k1k

C816

0.1
C814

100

6.3V

C815

220
10V

C813

0.1

C837

0.1

DATACK

LRSY

ADDATA

ADBCK

ADLRCK

C2FIN

TEST1

CKIN

VSS

CKOUT

TEST2

DVDD1

PW

SBSY

SFSY

SBCK

AVDD

VPRFR

VCOC

VPDO

AVSS

DVDD2

E
C
_
3
P

M

R834

100

C807

5

I/O

100

6.3V

IN
D

CM

4
A
T
A
D

M

6

I/O

C804

C859

C858

C857

R833 R832
100 2.2k

F

T

V

U

O

O
D
M
C

MP3 DECODER

LC78684E-E

6

A5

TA

T

A

A

D

D

M

M

7

I/O

C802

0.1

22p

22p

22p

22p

K
O
T

CN

IC801

7

TA
A
D

M

8

I/O

C844

0.1

L

E

B

B

IN

T

C

C

A

ES

T

IN

R

A
D

3

2

A

A

A1

A0

T

T

T

T

A

A

A

A

S
S
V

D

D

D

D

M

M

M

M

1

2

3

4

I/O

I/O

I/O

I/O

C
N
Y

FS

R860

100

C860
100p

F

C

K

S

C

AT

D6

S

N

O

R

V

D

Y

W

C

V

STD

FS

D

11

10

8

3

A

A9

TA

T

T

TA

D
D

S

V

VS

D

A

A

A

A

D

D

D

D

M

M

M

M

0

1

2

9

1

1

1

I/O

I/O

I/O

I/O

K

TC
S

2
1

TA
A
D

M

3
1

I/O

+1.8V REGULATOR

DVDD5

S

EQ

S
V

R
T
S

MADRS10

MADRS11

MADRS12

13

14

TA

TA

A

A

D

D

MDATA15

M

M

4

5

1

1

I/O

I/O

MM1571J

VIN

GND

CONT

MADRS0

MADRS1

MADRS2

MADRS3

MADRS4

MADRS5

MADRS6

MADRS7

DVDD4

MADRS8

MADRS9

CASUB

CASLB

16

I/O

IC803

VO

NOISE

C806

0.1

C805

C803

100

0.01

C843

0.1

VSS

OEB

WEB

RASB

6.3V

A0

A1

A2

A3

A4

A5

A6

0.1

A7

C817

A8

OE

UCAS

LCAS

WE

RAS

M701

(SLED)

M702

(SPINDLE)

C707

100

6.3V

SLED/SPINDLE

MOTOR DRIVE,

FOCUS/TRACKING

COIL DRIVE

IC722

BA5836FP

E

S

S

A

A

C

C
L

U

100

100

R805

R804

S

S

C
N

CA

CA
L

U

E

C

C

N

W

N

R801 R802

100 100

E
W

8
A

O

100

R803

E
O

AS
R

S
A
R

C835

0.1

C834

220
10V

4

S

C

D

(+)

N

4(-)

4

G

O

O

V

V

)
(+

(-)

1

1

O

O

V

V

C
IN
L

IN

S

ET

IN

ES

P
S

R

IN

C

C

T

IA

V

V

B

T
U
O

-B
TE

D

G

G

U

N

E

E

G

M

R

R

R744
100k

T

3

P

(-)

E

(+)

O

IN

3(-)

S

3

IN

E

O
V

R

VO

T

)

U

(+

(-)

D

2

2

IN

2
IN

FO

O
P

N

O

O

V

V

O

G

FB707FB708

FB804

C748

C747

220

0.1
10V

FB803

FB805

R807

100

R806

100

FB806

6

1

1

1

1

I/O

I/O

I/O

I/O

4

S

15

1

16

S
V

I/O

I/O

I/O

2

3

1

CC

I/O

I/O

I/O

V

1

2

3

4

I/O

I/O

I/O

I/O

1

1

1

I/O

I/O

I/O

I/O

2

1

0

3

S

1

1

1

1

S

I/O9

V

I/O

I/O

I/O

I/O

8

7

6

5

4

C
C

I/O

I/O

I/O

I/O

V

I/O

5

6

7

8

I/O

I/O

I/O

I/O

9

0

1

2

3

4

5

4

5

7

6

A

A

A

A

CN710

CD_WRQ

MP3_CE

CD_RES

AMUTE

P+7.0V

CD_CE

FSYNC

A-GND

D.OUT

D-GND

P-GND

19P

DRF

3.3V

R-CH

L-CH

3.3V

(SUFFIX-11)

CL

DO

DI

A1

(Page 32)

A2

(Page 38)

(SUFFIX-13)

A8

C

A0

N

0
A

S
V

MEMORY

IC802

LC32V4265CT

CC

2

V

A3

A

A1

1

2

3

A

A

A

CD_CE

DRF

CD_WRQ

-25
FSYNC

MP3_CE

CL

DO

DI

CD_RES

S

A4

A5

A6

A7

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

2727

6-8. SCHEMATIC DIAGRAM – CHANGER Section – • See page 52 for IC Block Diagrams.

LOADING MOTOR

DRIVE

IC701

BA6956AN

VREF

OUT2

OUT1

CX-JT8

VCC

FIN

VM

GND

RIN

IC731

RPI-576

TABLE ADDRESS SENSOR

M741

(TABLE)

SENS-IN

SENS-OUT

CN731

3P

GND

M751

(LOADING)

CN741

SENS-IN

SENS-OUT

GND

3P

DISC TRAY

ADDRESS DETECT

S751

OPEN/CLOSE

DETECT

OPEN

CLOSE

S711

CN721

2P

LM-2

LM-1 LM-1

E3

E2

E1

CN742 CN702

5P 5P

TM-2

TM-1

SENS-IN

SENS-OUT

GND

CN751 CN705

2P 2P

OPEN SW OPEN SW

GND GND

CN704

2P

LM-2

CN703

4P

E-3

E-2

E-1

GND

TM-2

TM-1

SENS-IN

SENS-OUT

GND

0.1

C735

0.1

C736

0.1

C737

R735

100

4.7k

R723

4.7k

R722

4.7k

R721

C751

0.01

D711

MTZJ-T-77

3.6B

R734

12k

R733

1k

TABLE MOTOR

DRIVE

IC712

BA6956AN

R712 R711

4.7k 1k

R713

22k

D701

MTZJ-T-77

5.1A

R702 R701

100 470

VREF

OUT2

RNF RNF

C741

0.01

R731R732

10010k

Q731

DTC114ESA

LEVEL

SHIFT

OUT1

VCC

FIN

VM

GND

RIN

C715

100
16V

TBL ADDRESS SENS

D+3.3V

OPEN SW

M+9V

GND

LM-R

LM-F

TM-R

TM-F

CN701

12P

E-1

E-2

E-3

(SUFFIX-11)

B1

(Page 31)

B2

(Page 37)

(SUFFIX-13)

C731

10

50V

C752 R751

0.1 4.7k

2929

CX-JT8

6-9. SCHEMATIC DIAGRAM – MAIN Board (1/4) (Suffix-11) – • See page 52 for IC Block Diagram.

(1/4)

CN101

ANTENNA

(COAXIAL)

LOOP

11P

CLK

DO

DI

CE

JK302

VM+9V

TUNED

ST

TUNER-L

GND

TUNER-R

TU-MUTE

2P

R301

4.7k

R302

4.7k

TUNER UNIT

SUPPLIED WITH

AM

THE ASSEMBLED

BLOCK

MD(VIDEO)

IN

L

R

D102

C103

R101

R102

R304 R303

22k 22k

JR300 C300

01

10EDB40-TB3

100 16V

10k

10k

C351

1000p

TUNED

TUMUTE

CLK

DO

DI

CE

C310

C101

ST

C102

4.7
50V

C352

470p

10

4.7
50V

50V

10

50V

10 50V

C301

10k

R330

A1

A2

A4

C309

10

50V

10 50V

C311C312

C365
220p

C411

4.7
35V

C313

10

16V

C327

0.0027

C317

R317

10

2.2k
50V

R325

0.022

C321

10k

0.022

C325C319

0.0470.047

C323

JR313JR312

00

R321 JR325
15k 0

1k

0.22

0.22

C331

C361
220p

R319

C333

1000p

C357

C356

1000

470p

10V

C354

R324

1k

MCLK

-VFL

R380
470k

R397

1k

Q311 Q310

R355 R356

2.2k 2.2k

2SD1306 2SD1306

C342 R354 R358R399 R398

0.1 47k 22k5.6k 5.6k

MUTINGMUTING

Q312

2SA1235F

MUTING

CONTROL

SWITCH

CD-MUTE

2.2k

R395

R316
10k

A5

2.2k

R396

(Page 31)

INPUT SELECT SWITCH,

TONE CONTROL,

ELECTRICAL VOLUME,

BASS BOOST AMP

IC301

M61529FP

C304

R327

4.7k

MIC-SIG

220p

C366

B1

B2

B3

4.7
50V

L2

L1

D-L

P

P

C

2/D

1/D

R

R

U

U

S

S

-R

IC

EF

D
C

R

M

C302

10 50V

4.7

C303

100
10V

35V

C353
470p

-L

-L

ER
N

TU

-R

ER
N

TU

C314C412

E-L

D

PE-L

M

AM

TA

G

E-R

-R
M

PE-R

D

A

TA

M

G

10

16V

2

I2

-2
B

EC
R

-1

CB
E
R

A2

B

O
M

TM

T

1
O

I1

TM

TM

0.022

C320

R318

2.2k

CC

TC

T

TC

1

C1

A1

TC

TCB

TC

0.022

0.0027

C326

0.047

C324

C328

R326

10k

C318

10

50V

2

2

2

T2

IN2

_A

U

L

O

O

BB

T

V

1

1

LIN

UT1

B-A

O
T

VO

B

0.22

0.22

C334

C332

0

0

JR311

JR310

R322

15k

JR322

B5

B4

T

D

T2

U

CK

_B2

BB

B-B1
B

R320

1k

0

N

U

O

G

O

T1
U
O

CLO

SW

T
U

A

C

AT

AO
S

VC

D

D317

C337

10

50V

R328

R323

33k

1k

R
T

/S
S
C

I

A

D

V

1SS355

C355
470p

C362
220p

C393

0.47
50V

R365

1M

B6

B7

B8

B9

B10

A6

A7

C1

C2

C3

C4

C5

(Page 33)

(Page 32)

3030

6-10. SCHEMATIC DIAGRAM – MAIN Board (2/4) (Suffix-11) – • See page 52 for IC Block Diagram. • See page 52 for Waveforms.

C268

1

R266

C272

1 50V

NC

ALC(L)

C273

150V

ALC(R)

HA12237F

REC-IN(L)

C247

2.2
50V

R271

10k

C248

2.2
50V

REC-IN(R)

IC201

NC

50V

NC

PB-OUT(L)

C269

1

50V

PB-OUT(R)

TAI(L)

TAI(R)

EQOUT(L)

C267

0.01

R265

4.7k

R267

4.7k

4.7k

C266

0.01

EQOUT(R)

PB-NF2(L)

PB-EQ(L)

PB-NF2
(R)

PB-EQ(R)

PB-NF1(R)

REC-RETURN

PB-NF1(L)

R220

10k

AIN(R)

NC

BIN(R)

GND

BIN(L)

RIP

AIN(L)

DECK A/B SELECT SWITCH,

REC/PB EQ AMP

(Page

30)

(2/4)

R272

R216

A1

A2

A4

A5

C234

R232R234

1000p

2.2k22k

C286

2200p

R226 C226

10k 2200p

R233

22k

C253

R286

10k

C259

22

25V

D205

R235

1SS355

10k

R270R282

10k100

C254

R283

R284

100
16V

R231

2.2k

R225

4.7

10k

10k

50V

C233
1000p

10k

4.7k

R287R288

10k10k

C258

4.7
50V

R278

22k

C285 R285
2200p 10k

C225

2200p

10k

C260

0.47 50V

C250

2.2
50V

REC-OUT(R)

NOR

VCC

ALC-DET

GND

IREF

TEST

REC-OUT

C261

0.47
50V

R215

4.7k

OFFALC-ON/

/HI

BA/

OFFMUTE-ON/

ONRECMUTE- /OFF

(L)

NC

C249

2.2
50V

CX-JT8

R268

4.7k

CN203

3P

C202

1000p

1000p

1000p

1000p

C204

C203

C201

CN202

8P

C232

47

16V

1 50V

C237

47 16V

C244

HP1

(PB)

(DECK-A)

HPRE1

(REC/PB/ERASE)

(DECK-B)

L-CH

R-CH

R-CH

L-CH

ERASE

Q223

2SC2001

BIAS OSC

R251

4.7

A6

A7

R400 R401 R402 R404 R405

10k 10k 10k 10k 10k

E2

E1

C239

0.015

C242C241

0.00470.0047

R252

22k

CLK

LCK

R368

100

R307

100

R430

10k

L201

BIAS OSC

S-OUT

R485

100

C392 C391 C390
100p 100p 100p

MULTI CONTROLLER

BU2099FV

VSS

NC

DATA

CLOCK

LCK

REC

BIAS

A/

B

PB MUTE

REC MUTE

IC309

REAR SP

FRONT SP

E3

TM-L(CD)

TM-R(CD)

LM-L(CD)

LM-R(CD)

TUNER

C223

0.022
100V

R241 R242

4.7k 4.7k

SP-F

LINK

C401

0.1

VDD

OE

SO

ON

/OFF

ON

/

OFF

MUTE

R486

100

R407 R408 R409 R410

10k 10k 10k 10k

MUTING MUTING

Q221 Q218

2SC3052F 2SC3052F

MUTING

R420

10k

R412 R413

10k 10k

2SC3052F2SC3052F

MUTING

D305

1SS355

VSS

NC

DATA

CLOCK

LCK

NC

NC

NC

I-BASS

CTRL3

Q220Q219

BU2099FV

Q225

2SA1235F

Q222,225

R245R273

REC ON/OFF

10k10k

SWITCH

Q222

2SC3052F

IC310

VDD

OE

SO

NC

BB CTRL1

BB CTRL2

BB CTRL3

BB CTRL4

CTRL1

CTRL2

C221

47

16V

BASS BOOST CONTROLLER

D206

1SS355

R246

47k

C402

0.1

CD-EN

TBL-SENSE

1SS355

R260

220

C240

10

50V

D306

R418R417R416R415R419 R414

10k10k10k10k10k 10k

Q228

2SB1116

REC BIAS

SWITCH

R269

10k

R253

10k

D+3.3V

(CHASSIS)

CN309

12P

M+9V

GND

LM-R

LM-F

TM-R

TM-F

E-1

E-2

E-3

(Page 29)

GA1

C450

10

50V

R424

22k

R425

11k

R353

11k

R352

11k

R455

22k

R466

JR309

0

JR308

JR307

JR306

JR305

JR304

JR303

JR316

22k

22k

R426

22k

R406

24

0

23

0

22

0

21

0

20

0

19

0

18

0

V-BASS

TUMUTE

TBL ADDRESS SENS

OPEN SW

(Page 33)

3131

CX-JT8

6-11. SCHEMATIC DIAGRAM – MAIN Board (3/4) (Suffix-11) – • See page 52 for IC Block Diagram.

B4

(3/4)

B1

B2

B3

(Page 30)

B7

B8

B5

R339

4.7k

R375

5.6k

R340

1k

R403

B6

3.3k

R331

2.2k

820

R478

B9

B10

F1

F2

F3

(Page

42)

(Page

45)

M731

(FAN)

(Page

27)

CN306

13P

L-OUT

SP-GND

R-OUT

LINK/MATRIX

UNREG VM

RELAY B+

IN-L

A-GND

IN-R

VCC

PW-GND

VM(AC)

VM(AC)

CN310

5P

HP CTL

D GND

R-OUT

HP-GND

L-OUT

CN303

3P

FAN+

FAN-

FAN+

CN312

19P

P-GND

P+7.0V

D-GND

AMUTE

D.OUT

3.3V

L-CH

A-GND

R-CH

3.3V

CD_RES

DI

DO

CL

MP3_CE

FSYNC

CD_WRQ

DRF

CD_CE

JR336

R347

4.7

4.7k
50V

LINK

C329

4.7
50V

R492
220k

R491
220k

Q491

2SC3052F

FEED BACK

HP

R394

10

JR333

0

ZZ1

ZZ2

ZZ3

ZZ4

ZZ5

ZZ6

ZZ7

ZZ8

0

C315

R493 C491

4.7
100k 0.015

50V

Q327

2SA1235F

R315 Q372

10k 2SC3052F

Q328

2SA953K

C386

47

25V

JR339

0

JR341

0

SWITCH

R393

R470

3.3k

R392

220

FAN MOTOR ON/OFF SWITCH

R494
220k

10k

Q327,328,372,373

C492

1

50V

D372 D371

1SS355 1SS355

R359
470k

C379 C377

R391

47

47k

25V

Q492

2SK2158

BASS BOOST

CONTROL

D374

1SS355

4.7
50V

R495

22k

C382

3300p

INB

HINA

INA

C383

3300p

Q373

R371

4.7k

R372

4.7k

2SC2001LK

C398

10
50V

C330C316

4.7
50V

C384

0.033

LINB

HINB

HOUTB

HOUTA

LINA

C385

0.033

LOUTA

LOUTB

VREF

OUTB

OUTA

BBE

R335

C367

0.22

R461R460

2.2k2.2k

UDZSTE-1713B

56k

LPOUT

C340

R338

47

4.7k
16V

GIN

GND

GOUT

LPIN

V+

C396

0.22

R421

10k

D312

BASS BOOST

ENHANCER

IC303

NJM2156

R480

10k

Q314

2SK2158

Q314-316

FERQUENCY

CONTROL

18 19 20

R468

R333

82k

10k

R332
47k

Q317

2SK2158

R300

4.7k

C400

22

ON/OFF

47
16V

Q304

FRONT

RELAY

DRIVE

25V

R361

5.6k

R362

22k

C341

2SA953K

SPEAKER

Q315

2SK2158

R479 R337 R467

47k 1.5k 1.5k

R334

8.2k

Q318

2SK2158

Q317-320

BASS BOOST

CONTROL

2SC3052

BASS BOOST ON/OFF SWITCH

R433

680
2W

C439

4.7 100V

Q316

2SK2158

JR337

0

R336

27k

21

22

50V

50V

10

10

C369

C370

F4

(Page 33)

F5

F6

F7

F8

F9

V-BASS

CD-MUTE

23

24

R364
100k

D311

1SS355

SP-F

Q319

2SK2158

Q320

2SK2158

10k

R370

R367

4.7k

Q323

R434

680

2W

C440

R363

4.7

22k

100V

R366

270

(Page

47)

CN311

9P

LC78646 CE

CD DRF

LC78646 WRQ

LC78684 SYNC

LC78684 CE(MP3)

LC78646/LC78684 CLK

LC78646/LC78684 DO

LC78646/LC78684 DI

LC78646 RESET

ZZ8

ZZ7

ZZ6

ZZ5

ZZ4

ZZ2

ZZ3

ZZ1

F10

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

3232

6-12. SCHEMATIC DIAGRAM – MAIN Board (4/4) (Suffix-11) –

CX-JT8

(Page 30) (Page 31)

(Page 32)

5

C4

C

C3

C2

C1

1
E

E2

E3

(4/4)

C363

10

F1

F2

GND

F3

F4

D319 D320

F5

F6

F7

F8

F9

10EDB40-TB3 10EDB40-TB3

D321 D322

10EDB40-TB3 10EDB40-TB3

R310

R309

0

BUFFER

IC304

NJM4565M

VCC

0

D301 D302

10EDB40-TB3 10EDB40-TB3

C419C418

0.010.01

50V

R313
100k

C364

10

50V

C417
1000

10V

R432

100

C339

220
16V

R427 R428

00

R487

0

R488

0

D304D303

10EDB40-TB310EDB40-TB3

C374C373

0.010.01

C375
2200

25V

10EDB40-TB3 10EDB40-TB3

D307

1SS355

R314
100k

+9V REGULATOR +9V REGULATOR +10V REGULATOR+4V REGULATOR

IC305 IC306 IC308 IC313

TA7809S TA7809S TA7810S

IO

G

JR302

0

D315 D313

D314

10EDB40-TB3

R484

10k

Q330

2SC3052F

µPC3504HF

IO

G

C380 C381

470
16V

Q331

2SA1235F

D316

10EDB40-TB3

R483

Q330,331

1k

POWER ON/OFF

RELAY DRIVE

R482 R481

4.7k 4.7k

IO

G

C399

47

16V

470
16V

C371

47

16V

R378

10k

R379

2.2k

C420 C421
2200

25V

Q301

2SA1980G

Q301,302

B+ SWITCH

Q302

2SC3052F

C372

10

50V

IO

G

Q324

355

50k
1

1SS

1

4

43

36

R

D

C345

100
16V

2SC3052F

CENTER

VOLTAGE

GENERATOR

R388

1k

C397

100
10V

MIC10V

CN304

0

0

0

SW LIMIT

O-POWER

SW OUT

VM+10V

SYSTEM MUTE

VSTBY

DC-DET

HOLD

P-0N

FIL-1

FIL-2

CN307

-VFL

31P

13P

VF1

VF2

D-GND

-VFL

EVER 10V

MIC 10V

4V(SW)

BU1924 CLK

BU1924 DATA

TUNER STEREO

TUNER TUNED

LC72121 CE

LC72121 DI

LC72121/M61529/BU2099FV DO

LC72121/BU2099FV CLK

M61529 CLK

BU2099FB LCK

CD NUMBER SENS

BU UP DOWN/CD OPEN CLOSE

NC

SYSTEM MUTE

STREAM IN(VACS)

TUNER S-METER

S-OUT

DECK 9V

MIC GND

MIC SIG

PROTECTOR (HOLDER)

POWER RELAY

HP

A-GND

(Page 42)

(Page 47)

FIL2

FIL1

-VFL

EVER+10V

MIC+10V

+4V

ST

TUNED

CE

DO

DI

CLK

MCLK

LCK

TBL-SENSE

CD-EN

S-MUTE

VACS/STR

S-OUT

DECK+9V

JR326

0

MIC-S

HOLD

O-POWER

220
16V

R386

10k

R387

12k

HP

FIL1

FIL2

EVER+10V

-VFL

O-POWER

HOLD

S-MUTE

R348 R384

01k

JR317

JR321

JR328

R346

22k

SW ON/OFF SENS

D308

0

F10

O-POWER

DECK+9V

+4V

O-POWER

JR334

MIC-SIG

0

MIC-S

3333