(No.MA247)1-17
5.3
Spindle section
5.4
Tracking section
Is the disk rotated?
NO
YES
Is the voltage output at
pin 6 and pin 7 of IC501?
Does the RF signal appear
at pin 83 of IC541?
YES
Check the spindle motor
and its wiring.
Is the RF waveform at
pin 83 of IC541 distorted?
Proceed to the Tracking
section.
Check the circuits in
the vicinity of IC541
or the pickup.
YES
NO
NO
YES
NO
Is the voltage input at pin
17 of IC501?
YES
NO
Is the voltage output at
pin 13 of IC541?
Check the connections
between IC501 and
IC541.
YES
NO
Is the power supply
present at pin 3, pin 12
and pin 21 of IC501?
YES
Check IC501.
NO
Check the connections
of CD8V power supply.
YES
Check IC541.
NO
Check the connections
of CD8V power supply.
Is the power supply
present at pins 8,16,25,
28,32,53,71 and pin 90
of IC541?
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error
signal output at pin 6
of IC541?
Replace IC541 or repair
the malfunction
connection point.
YES
NO
Check the pickup and
its connections.
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