Troubleshooting (Cd Section) - Sharp MD-C2 Service Manual

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.
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
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 continuse to tum,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 the cleaner disc.
If the CD cleaner brushes becom 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 rines 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
• When the turntable fails to stop.
5V
Is from 5 V till 0V down pulse (approx. 300 ms)
0V
input into the ICF01 pin 95 when the turntable is rotating?
When the mechanism is operating, is the following voltage
found on pin 94 of ICF01?
While the CD mechanism is moving up: 0V
Otherwise: 5.0V
Check the connection from pin 26 on IC2 to pin 23 on IC3.
ICF01 defective.

TROUBLESHOOTING (CD SECTION)

mark next to it.
Yes
Yes
Yes
No
Check the SW3 and the wiring from the ICF01 pin 95 to the
SW3. (Disc No. 5W)
No
Check the SW2 (Mechanism up SW) and the wiring from the
ICF01 pin 94 to the SW2 .
– 67 –
MD-C2
Parts code
UDSKA0004AFZZ
Cieaner Fluid
Cleaner disc