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– 73 –

FMO

FOO

Stopped

Track jump

9

Feed motor and tracking output 
during the track jump

10

IC3 40 pin

IC3 33 pin

FOO

FO+

FO-

Stopped

It is actuated 
normally.
When a cap was 
closed without a 
disc.

4

Focus search

5

10

IC3 33 pin

IC1 4 pin

IC1 3 pin

IC3 41 pin

IC1 26 pin

IC1 25 pin

Stopped

CD test 2->3 
upgrade

7

Disc motor output while in the 
test mode

11

12

DMO

SP+

SP-

Stopped

When there is no 
wound in the disk.

13

Normal tracking actuator drive

TR+

IC1 5pin, 6pin 

FO-

Disc playback
There is no 
wound in the 
disc.

Stopped

5

Normal focus actuator drive

4

IC1 3 pin

FO+

IC1 4 pin

IC1
5 pin-6 pin
When there is a 
wound in the disc.

Stopped

Actuator drive when damaged

13

TR+

IC1 5 pin

– 74 –

      Parts code

1.

CD optical pickup Lens cleaner disc

UDSKA0004AFZZ

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 trouble shooting 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 off the power, and wipe the lens softly using a cleaning paper moistened with commercially available cleaning solution so
as not to damage it.
Be careful not to touch the lens with bare hands.

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

CAUTION

Cleaning fluid

Cleaner disc

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.

Place the CD cleaner disc onto the CD disc tray with the brush side down,then 

press the play button.

You will hear music for about 20 seconds and the CD player will automatically stop. 

If it continuous to turn, press the stop button.

1.

2.

3.

The CD lens cleaner should be effective for 30-50 operations, however if the 

brushes become worn out earlier then please 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 disk 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.

– 75 –

Is 1.5V applied to the LDO terminal of pin 7 of IC2 ?

No

Yes

Is +1.8V applied to the collector of Q1 ?

Yes

No

IC2 is defective

Is +3.3V applied to C4 of R8 ?

The PWB pattern has been cut between Q1 and pin 8 of
CNS2.

No

Is +1.8V applied to pin 8 of CNS2 ?

R8 is defective.

No

Check the +3.3V stabilization circuit of IC1 and L2.

Yes

Yes

Is the laser lit in the CD test mode 1 ?

Yes

Does the unit switch from the CD test mode 1 to 2 ?

Refer to "Out of focus”.

Yes

When the CD test mode is changed from 2 to 3, does the disc
motor rotate properly ?

Yes

No

No

No

Refer to “HF is abnormal”.

No

Is sound output when the pickup lens is moved to where a track
is located by pressing the             (button) and            (button) in

the CD test mode5 ?

Yes

No

Yes

Check the power circuit in the main unit.

Refer to “The laser does not light up”.

Is the output at pin 19(HF) of IC2 flat in the CD test mode 4 ?

Does the sled motor run ?

Refer to “Track search is impossible”.

No

Are tracks played from the track 1 in ascending order by pressing

the             (button) ?

Refer to “The disc motor CLV servo is defective”.

Refer to “The sled motor
does not run”.

No

Refer to “No sound is heard”.

Yes

When the unit is turned off and on again, is it initialized ?

No

Has the optical pickup
returned to the inner
periphery position ?

Is the optical pickup in

switch in the OFF state ?

No

The optical pickup in-switch

is defective (ON state).

Yes

Check the
microcomputer
PWB.

ON

OFF

The optical

pickup in
switch is
defective.

Normal

Yes

The optical pickup is defective if CNS2 is normal.

Yes

Yes

When a disc is loaded, the power is turned on, and the CD (stop) button is pressed, is +7.2V applied to the collector of Q5 and +5.0V to the

emitter? Is +3.3V applied to pin 22 on IC1?

Is the voltage applied as shown in the wiring diagram ?

– 76 –

Does the pickup lens go up and down when removing the
disc ?

No

Yes

No

Refer to "The triangular wave for focus servo does not
appear".

Check the optical pickup wires. If OK, the optical pickup is
defective.

IC2 is defective.

Yes

Is the waveform inputted at pin 15 on IC2 when loading a
disc ?  <Refer to the waveform diagrams on page 72.>

Normal

No

Check between IC2 and CNS1. If OK, the optical pickup is
defective.

Check the parts around IC2. If OK, IC2 is defective.

Check the portion between IC1 and CNS2 and connection of the optical pickup wires. If OK, the optical pickup is defective.

Yes

Is tracking input found at pin 11 of IC2 ?
<Refer to the waveform diagrms on page 72.>

No

Check the parts around IC3. If OK, IC3 is defective.

Is the tracking output found at pin 34 on IC3 in the CD test
mode 4 ?

No

Check the parts around IC1. If OK, IC1 is defective.

Is there the output between pin 5 and 6 on IC1 ?

Yes

Yes

Is the output (tracking error signal) found at pin 4 and 5 on
IC2 in the CD test mode 3 ?

Abnormal

Yes

No

Refer to "The sled motor does not run".

IC2 is defective.

Check the portion between IC1 and CNS2 and connection of the optical pickup wires. If OK, the optical pickup is defective.
Check the portion between IC1 and CNS3, sires and periphery of the sled spin motor. If OK, the motor is defective.

Yes

Is the waveform outputted to pin 11 and 17 on IC2 when a
track is jumped ?
<Refer to the waveform diagrams on page 72.>

No

If the parts around IC1 are normal, IC is defective.

Is the wave form output found at pin34 and 40 on IC3 when a
track is jumped ?
<Refer to the waveform diagrams on page 73.>

No

If the parts around IC1 are normal, IC is defective.

Is the slide output found at pin25 and 26 on IC1, and the
tracking output at pin5 and 26 ?

Yes

Yes

Does the sled motor run by pressing the          /          button
in the test mode ?

No