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XL-DAB9H

6 – 19

DISPLAY PWB-A2 (TOP VIEW)

DISPLAY PWB-A2 (BOTTOM VIEW)

SENSOR PWB-A4 (BOTTOM VIEW)

TUN1

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XL-DAB9H

7 – 1

The CD section may not operate when the objective lens of the optical pickup is dirty. 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 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.

1) Focus-HF system check

2) Tracking system check

3) Spin system check

4) PLL system check

5) Others

Parts code

1.

CD optical pickup Lens cleaner disc

UDSKA0004AFZZ

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 still play continuously, 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 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 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.

XL-DAB9H

7 – 2

Press the DISC EJECT switch (SW708) without inserting a disc, 
and try starting the playback operation.

FDO

TDO

Stopped

1. Does the pickup move to the PICKUP-IN Switch position?

No

Sled motor.

Yes

2. Does the focus (lens) move up and down?
(Waveform drawing Figure 1)

No

Check the focus peripheral circuit.

Yes

3. Is the laser lit?

No

Check the laser diode driver Q801 peripheral circuit.

Yes

4. Is the turntable rotating?

No

Spindle motor.

When a disc is loaded, start playback operation.

1. Is focus servo activated?
(Waveform drawing Figure 2)

No

Pins 5~9,11, 14 and 18,19 on IC801.
Check the laser diode driver Q801 peripheral circuit.

Yes

2. Does DRF change from "L" to "H"?

No

Is the disc rotating?

No

Check the spin system.

Yes

If the disc is spinning and a HF waveform 
is generated, DRF will go H.

3. Is the HF waveform normal?
(Waveform drawing Figure 3)

No

If the level is not normal.

FDO

TE

Stopped

RF

XL-DAB9H

7 – 3

If the waveform shown in Figure 4 appears and soon after NO 
DISC appears?

Yes

The tracking servo is not activated.
Check the peripheral circuits at pins 15, 16 and 23 on IC801, 
and FC801.

No

"Initialization" is possible, but play is not possible?

Yes

A normal jump operation cannot be completed or the beginning 
of the track cannot be found.
Check the around pin 23 on IC801.

No

"Initialization" is not possible.

Data cannot be read. Check the VCO-PLL (Pin26~30 on IC801) 
system.

TE

Stopped

Press the DISC EJECT switch without inserting a disc, and 
then try starting the play operation.

1. The turntable rotates a little?
(Waveform drawing Figure 5)

Yes

The spin driver circuit is OK.

No

2. The turntable doesn't rotate.

Check around pin 25 on IC801, pins 10 and 11 on IC802, and 
CNW402.

FDO

SPDO

Stopped