Read Sharp CD-MD3000 (serv.man7) Service Manual online
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CD-MD3000H/CD-MD3000W
STEP 1
Does the display "E-CD01" appear?
Yes
No
Does the pickup move to the inner/outer position using the
'UP'/'DOWN' key?
'UP'/'DOWN' key?
Yes
STEP 2
Laser ON?
Check from pins 7 and 8 of CNP5 via Q4 and pins 6 and 7 of
IC6 to pin 38 of IC2.
IC6 to pin 38 of IC2.
Yes
STEP 3
Focus search?
Yes
STEP 4
No
No
No
Check from pins 5 and 6 of CNP6 via pins 19, 20 and 21 of
IC5 to pin 41 of IC2.
IC5 to pin 41 of IC2.
No
Tracking servo?
Yes
No
Check from pins 21, 22 and 23 of IC6 to pin 24 of IC2.
No
Yes
Yes
Check in the CD test mode.
Check the line of PU-IN SW.
Check from pin 2 of CNP6 via pin 25 of CNP1 to pin 94 of
IC901.
IC901.
Check the line of the slide control.
Check from pins 3 and 4 of CNP6 via pins 17, 18 and 22 of
IC5 to pin 40 of IC2.
Check from pins 3 and 4 of CNP6 via pins 17, 18 and 22 of
IC5 to pin 40 of IC2.
Focus search?
STEP 5
Check from pins 1 and 2 of CNP5 via pins 3, 4 and 5 of IC5 to
pins 31 and 34 of IC2.
Check from pins 2 and 5 of CNP7 to pins 4 and 5 of IC6.
pins 31 and 34 of IC2.
Check from pins 2 and 5 of CNP7 to pins 4 and 5 of IC6.
RF signal
Check from pins 50 and 53 of IC2 to pins 24 and 28 of
CNP1.
CNP1.
No
AUDIO signal
Check from pins 3 and 4 of CNP5 via pins 1, 2 and 6 of IC5 to
pins 29 and 33 of IC2.
Check from pins 1, 3 and 4 of CNP7 to pins 2 and 3 of IC6.
pins 29 and 33 of IC2.
Check from pins 1, 3 and 4 of CNP7 to pins 2 and 3 of IC6.
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