Troubleshooting - Sharp CD-C811W Service Manual

Table of Contents

When the CD does not function

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.

Cleaner Liquid

• When the turntable fails to stop.

Is from

5 V till 2.5V down pulse (approx. 300 ms)

2.5V

input into the IC701 pin 41 when the turntable is rotating?(CD-C811W)

input into the IC701 pin 42 when the turntable is rotating?(CD-C821W)

Is there following voltage input on the IC701 pin 41 in the specific

state?(CD-C811W)

Is there following voltage input on the IC701 pin 42 in the specific

state?(CD-C821W)

When the CD mechanism is moved up: 0V

In other states: 4.3V

Check IC2 pin26 Q51 and the periphery.

IC701 defective.