Read Sharp CD-MD3000 (serv.man7) Service Manual online
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."
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.
cleaning disc designed for CD optical pickup lenses.
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
3. You will hear music for about 20 seconds and the CD player will automatically stop. If it continues to turn, press the stop
PARTS CODE: UDSKA0004AFZZ
IC6 to pin 38 of IC2.
IC5 to pin 41 of IC2.
Check from pins 3 and 4 of CNP6 via pins 17, 18 and 22 of
IC5 to pin 40 of IC2.
pins 31 and 34 of IC2.
Check from pins 2 and 5 of CNP7 to pins 4 and 5 of IC6.
pins 29 and 33 of IC2.
Check from pins 1, 3 and 4 of CNP7 to pins 2 and 3 of IC6.
operation. If MD fails persistently to operate, perform checks as follows.
If dust or foreign substance is accumulated on the pickup lens, playback is disturbed and indication of TOC (content of tracks) may
be disabled. Before adjusting check that the lens is clean. If the lens is contaminated, treat it as follows.
it with due care so that the lens is not damaged. At this time do not touch the lens directly with your finger.
reflection disc to playback state?
reflection disc inserted?
applied to the pin 93 of IC1401with the low reflection disc inserted?
12, 16, 17, and 19 of IC1701.
is turned on?