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– 33 –

R685

R686

C688

Q683

C685

C686

C660

Q681

D685

ZD682 

R683

C689

R684

CNS652

D684

D683

D682

D681

C684

ZD681 

R682

R681

C696

C683

T681

SO651 

LF651 

T651

C652

C651

D651

D652

D654

C653

D653

C654

C695

CNP681

E  C  B

B  C  E

E  C  B

RLY681

Q682

F651

T2.5A L 250V

2 

1

3 

1 

2

2   1

CNP652

TO MAIN PWB

1

2

CNP653

T.F

SO651
AC POWER
INPUT 
SOCKET
AC230V, 50HZ

When servicing, pay attention as the area
enclosed by this line (                 ) is directly
connected with AC main voltage.

(238)

FROM TAPE 
MECHANISM
GND

TO MAIN 
CHASSIS
GND

SUB POWER TRANSFORMER

MAIN POWER

TRANSFORMER

B R

COLOR TABLE

R D ( R )

O R

Y L

G R

B L

V L

G Y

W H ( W )

B K

P K

BROWN

RED

ORANGE

YELLOW

GREEN

BLUE

VIOLET

GRAY

WHITE

BLACK

PINK

M901

TAPE MOTOR

7     6     5     4     3     2     1

SW901

SW902

FOOL

PROOF

CAM

PHOTE
INTERRUPTER

PH901

SOL901
SOLENOID

RD

WH

CFW901

CNP901

TAPE
MECHANISM
PWB-D

POWER  PWB-B

TAPE MECHANISM
ASSEMBLY

TAPE
MECHANISM
PWB-E

BR

RD

P30 1-C

YL

BR

RD

BI652

(229)

CNS707

FROM
DISPLAY PWB

P31 12-G

CNS901

FROM MAIN PWB

P30 4-H

1

1

2

2

– 34 –

When the CD section does not operate when the objective lens of the optical pickup is dirty, this section may not operate. Clean
the objective lens, and check the playback operation. When this section does not operate even after the above step is taken, check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC (Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup
lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."

Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.

Dust gradually accumulates on the objective lens during use, and it may degrade performance.  To avoid this problem, use a
cleaning disc designed for CD optical pickup lenses.

HOW TO USE
1. Using the brush in the cleaner cap, apply 1 or 2 drops of the cleaning fluid to the brush on the CD cleaner disc which has

the 

 mark next to it.

2. Place the CD cleaner disc onto the CD disc tray with the brush side down, then press the play button.
3. You will hear music for about 20 seconds and the CD player will automatically stop.  If it continues to turn, press the stop
button.
CAUTION

 The CD lens cleaner should be effective for 30~50 operations, however if the brushes become worn out earller then please

replace the cleaner disc.

 If the CD cleaner brushes become very wet then wipe off any excess fluid with a soft cloth.

 Do not drink the cleaner fluid or allow it to come in contact with the eyes.  In the event of this happening then drink and /

or rinse with clean water and seek medical advice.

 The CD cleaner disc must not be used on car CD players or on computer CD ROM drives.

 All rights reserved.  Unauthorized duplicating, broadcasting and renting this product is prohibited by law.

Cleaner Liquid

Cleaning Disc
PARTS CODE: UDSKA0004AFZZ

– 35 –

Make sure that the disc is normal, and set the CD TEST MODE (STEP 1).

Is the measured voltage as specified in circuit diagram?

Check the main unit power supply circuit.

No

Yes

No

Is "Er-CD01" displayed"?

Yes

Move the pickup to most internal circumference side of disc.
Turn the power off and reset the CD TEST MODE (STEP 1).
Is "PU ERROR " not displayed?

Yes

Check the PWB pattern between pin 45 (CD RES) of IC701 and
pin 100 (/RST) of IC802.

No

Is +5V applied to pin 100 (/RST) of IC802?

Yes

Is CD Lid switch SW701
ON condition ?

No

Does the CD TEST MODE advance from "STEP 2"?

Yes

Check the between pattern IC701 and SW701 If OK.
Check the main unit power supply circuit.

No

Does the laser come on in CD TEST MODE "STEP 2"?

Check the procedure in "LASER FAILURE".

Yes

Does the CD TEST MODE advance from "STEP 3" to "STEP
4"?

Check the procedure in "FOCUS FAILURE".

Yes

Yes

Does the spindle motor rotate normally when the CD TEST
MODE changes from "STEP 4" to "STEP 3"?

Yes

Is the HF output on pin 38 of IC802 in CD TEST MODE "STEP 5"?

Check the procedure "HF ERROR".

Yes

No

No

No

No

Check the pattern between pin 57 (PUIN) of IC701 and BI803/
CNS803.
Check the between BI803/CNS803 and PU-IN switch.

Set ON condition the CD
Lid switch.

Check the procedure in "SPINDLE MOTOR CLV SERVO
FAILURE".

No

Does the sled motor
move ?

No

Does the sound heard when the optical pickup move to the
selected play by the FF/REW key.

Check the procedure "NO SOUND"

No

Yes

Check the procedure in
"SLED MOTOR
OPERATING FAILURE ".

Does the LCD track number and time indicator work properly ?

Check the pattern between IC701 and LCD701.

Yes

No

Is "Er-CD01 "
displayed ?

No

Turn the power off and then back on.
Does the unit initialize properly and start playback when PLAY
key is pressed?

Check the pattern between pin 57 (PUIN) of IC701 and
BI803/CNS803.
Check the between BI803/CNS803 and PU-IN switch.

No

Yes

Is "Er-CD01" displayed?

Check the procedure in "HF ERROR".

Yes

Yes

Does the unit play in order in the FF mode?

Check the procedure in "TRACK SEARCH FAILUR".

Yes

Does playback continue for 30 seconds after the start of
playback ?

Check the procedure in "SLED SERVO FAILURE".

Yes

Normal

No

No

Yes

– 36 –

Is 0V applied to the pin 57 (SEL) of IC802 ?

Yes

No

Does the laser come on when pattern cut between pin 8 (SEL) of
IC801 and pin 57 (SEL) of IC802 ?

Check the PWB pattern between IC701 and IC802 (BUCK/CCE/
BUS0~3)

Yes

Yes

No

Check the peripheral parts of IC801 and Q801. If it is normal, the
optical pickup is faulty.

No

Check BI802/CNS802. If it is normal, the optical pickup is
faulty.

Is approx. 2V applied to the collector of Q801.

Does the optical pickup move up and down when the disc is
removed?

Is the following waveform ouput at the pin 43 (FEI) of IC802
when the disc is set?

Is the waveform shown above input at the pin 44 (SBAD) of
IC802?

Yes

Yes

No

No

The optical pickup is faulty.

Check as stated in item "FOCUS SERVO SAWTOOTH WAVE
FAILURE".

Yes

Check the periphery of IC801 and BI802/CNS802. Is it normal?

No

Check the pattern between pin 13 of IC801 and pin 44 of IC802.
Check the periphery of IC801 and BI802/CNS802.

IC801 is faulty.

Yes

Is +6.2V applied to the emiter of Q861 ?

Is +5V applied to the collector of Q861 ?

Yes

No

No

Check the PWB pattern between pin 16 of CNS602 and emiter of
Q861.

Check the peripheral parts of IC804 and Q861.

Is +5V applied to the pin 62 (VDD) of IC802 ?

Is +5V applied to the pin 1 (VCC) of Ic801 ?

Yes

No

No

Check the PWB pattern between collector of Q861 and pin 62 of
IC802.

Check the PWB pattern between collector of Q861 and pin 1 of
IC801.

pin 43

(FEI)

pin 48

(FOO)

pin 44

(SBAD)

Yes

Yes