JVC KD-LX333R Service Manual page 15

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3 7 63 1515 0
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.
Focus section
When the lens is
moving:
Does the S-search
waveform appear at
IC501 pins "8" and "9"?
Spindle section
TE
L 13942296513
Is the disk rotated?
YES
Does the RF signal
appear at TP1?
YES
Is the RF waveform at TP1
distorted?
YES
Proceed to the Tracking
section
Tracking section
When the disc is rotated
at first:
www
Is the tracking error signal
output at IC521 "11"?
.
Check IC541.
http://www.xiaoyu163.com
NO
Is the wiring for IC541
(56)~(64) correct?
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
Check the pickup and
YES
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 IC521 "19"~
NO
"24" or the pickup
YES
Approx. 1.2V
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YES
http://www.xiaoyu163.com
8
YES
Is 3.3V present at IC501
NO
Check the vicinity of
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
Check the circuit in the
vicinity of IC521 pins
"2"~"12".
.
2 9 9 4 2 8
NO
pin "20"?
YES
Check CD 8V
and 5V.
IC541.
1 5 0 5 8 2 9 9 4
NO
YES
IC501.
Check IC541 and
Check the pickup and
YES
its connections
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KD-LX333R
9 9
2 8 9 9
IC521.
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