(No.49871)1-25
SECTION 5
TROUBLESHOOTING
5.1
Feed section
5.2
Focus section
5.3
Spindle section
5.4
Tracking section
Is the voltage output at
IC541 pin "4" is 5V or 0V?
Check the feed motor.
Is 4V present at both
sides of the feed motor?
Is the wiring for IC541
"1" to "14" correct?
Is 8V present at IC541
pin "6"?
Check the feed motor
connection wiring.
Check the vicinity of
IC561.
YES
YES
NO
NO
NO
YES
YES
Check CD 9V.
When the lens is
moving:
Check the circuits in
the vicinity of IC541
pins "8" and "9".
Check the pickup and
its connections.
NO
YES
YES
Does the S-search
waveform appear at
IC561 pins "32"?
4V
Is the disk rotated?
Does the RF signal
appear at RF TP?
Is 4V present between
IC541 pins "6" and "7"?
Check the spindle motor
and its wiring.
Is 4V present at IC561
pin "29"?
Check the vicinity of
IC541.
Check IC561 and
IC801.
YES
NO
NO
NO
NO
NO
YES
YES
YES
Check the circuits in the
vicinity of IC561 "21" to
"40" or the pickup.
Is the RF waveform at
RF TP distorted?
Proceed to the Tracking
section.
When the disc is rotated
at first:
Check the circuit in the
vicinity of IC561 pins
"21" to "40".
Check IC501.
Check the pickup and
its connections.
YES
NO
YES
Is the tracking error
signal output at TE TP?
Approx. 1.2V
Содержание KD-S283
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