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5.1
Feed section
Is the voltage output at
IC541 pin "4" is 5V or 0V?
YES
Is 4V present at both
sides of the feed motor?
YES
Check the feed motor.
5.2
Focus section
When the lens is
moving:
4V
Does the S-search
waveform appear at
IC561 pins "32"?
YES
5.3
Spindle section
Is the disk rotated?
YES
Does the RF signal
appear at RF TP?
YES
Is the RF waveform at
RF TP distorted?
YES
Proceed to the Tracking
section.
5.4
Tracking section
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error
signal output at TE TP?
YES
Check IC501.
SECTION 5
TROUBLESHOOTING
NO
Is the wiring for IC541
"1" to "14" correct?
NO
Check the feed motor
connection wiring.
NO
Check the circuits in
the vicinity of IC541
pins "8" and "9".
YES
Check the pickup and
its connections.
NO
Is 4V present between
IC541 pins "6" and "7"?
Check the spindle motor
and its wiring.
NO
Check the circuits in the
vicinity of IC561 "21" to
NO
"40" or the pickup.
Check the circuit in the
NO
vicinity of IC561 pins
"21" to "40".
YES
Is 8V present at IC541
pin "6"?
YES
Check the vicinity of
IC561.
NO
Is 4V present at IC561
pin "29"?
YES
Check the vicinity of
IC541.
YES
Check the pickup and
its connections.
NO
Check CD 9V.
NO
Check IC561 and
IC801.
(No.49871)1-25
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