Sharp CD-MD3000H Service Manual page 89

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