Chapter 7. Flowchart; Troubleshooting - Sharp HT-DV30H Service Manual

HT-DV30H

CHAPTER 7. FLOWCHART

[1] Troubleshooting

1. When the CD/DVD does not function
The CD/DVD 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 or 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. CD optical pickup Lens cleaner disc
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/DVD disc tray with the brush side down,
then press the play button.
You will hear music for about 20 seconds and the CD/DVD player will automatically
3.
stop. If it still play continuously, press the stop button.
CAUTION
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.
2. DVD Section
• "No Disc" is displayed. (Focus error)
Does the objective lens move up and down after the disc is
removed? (Check the following items.)
Is signal input to pins 4 - 11, 14, 15 of IC1?
Is focus control signal output from pin 43 of IC1 to pin 1 of IC2?
To 7-2 Page
Yes
No Check CNP1 pin 23, 24 and IC2 pin 13, 14.
No Check connection of optical pickup cables.
If no abnormality is detected, replace optical pickup.
No Check focus control signal line between IC1 and IC2.
(Refer Figure 1)
7 – 1
Parts code
UDSKA0004AFZZ
Cleaning fluid
Cleaner disc