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QQ
3 7 63 1515 0
3.2.1 Feed section
Is the voltage output at
IC541 pin "40" 5V or 0V?
YES
Is 4V present at both
sides of the feed motor?
YES
Check the feed motor.
3.2.2 Focus section
When the lens is
moving:
Does the S-search
waveform appear at
IC501 pins "8" and "9"?
3.2.3 Spindle section
TE
L 13942296513
Is the disk rotated?
YES
Does the RF signal
appear at RF test point?
YES
Is the RF waveform at RF
test point distorted?
YES
Proceed to the Tracking
section
3.2.4 Tracking section
When the disc is rotated
at first:
Approx. 1.2V
www
Is the tracking error signal
output at IC501 "11"?
.
YES
Check IC541.
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NO
Is the wiring for IC501
pin 27?
NO
Is 6V or 2V present at
IC501 "4" and "5"?
Check IC501.
NO
Check the circuits in
the vicinity of IC501
pins "8","9"and"15".
4V
YES
Check the pickup and
its connections
NO
Is 4V present at IC501
pins "6" and "7"?
Check the spindle motor
and its wiring
NO
Check the circuits in the
vicinity of IC501 "19"~
NO
"24" or the pickup
Check the circuit in the
YES
vicinity of IC501 pins
"2"~"12".
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8
YES
Is 3.3V present at IC501
pin "20"?
NO
Check the vicinity of
IC541.
YES
Check the feed motor
connection wiring.
NO
YES
Q Q
3
6 7
1 3
NO
Is 4V present at IC541
pins "41" ?
YES
Check the vicinity of
IC501.
YES
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.
2 9
9 4
2 8
NO
YES
Check CD 8V
and 5V.
1 5
0 5
8
2 9
9 4
NO
YES
Check IC541 and
IC501.
Check the pickup and
its connections
m
co
KD-S847
9 9
2 8
9 9
(No.49832)1-25
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