1-18 (No.MA232)
5.2.3 Spindle section
5.2.4 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 TP RF?
YES
Check the spindle motor
and its wiring.
Is the RF waveform
at TP RF distorted?
Proceed to the Tracking
section
Check the circuits in
the vicinity of IC601
or the pickup.
YES
NO
NO
YES
NO
Is the voltage input at pin
17 of IC501?
YES
NO
Check the connections
of CD8V power supply.
NO
Is the voltage output at pin
41 of IC541?
Check the connections
between IC501 and
IC541.
YES
NO
YES
Check IC541.
NO
Check the connections
of CD8V power supply.
Is the power supply
present at pin 6, pin 15,
pin 25, pin 39, pin 43,
pin 51 and pin 64 of IC541?
Is the power supply
present at pin 3, pin 12
and pin 21 of IC501?
YES
Check IC501.
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error
signal output at pin 11
of IC521?
Check the circuits in
IC521 or the vicinity
of IC521.
Replace IC521 or repair
the malfunction
connection point
YES
Check IC521.
NO
Check the pickup and
its connections.
YES
NO
