JVC KD-G111 Service Manual page 28

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5.2 KD-G111 E2,EX2,EY2,EU2 and KD-G117 EE,EE2 version model 3 7 63 1515 0
5.2.1 Feed section
Is the voltage output at
IC521 pin 40, 5V or 0V
YES
Is 4V present at both
sides of the feed motor?
YES
Check the feed motor.
5.2.2 Focus section
5.2.3 Spindle section
TE
L 13942296513
Is the disk rotated?
YES
Does the RF signal
appear at TP RF?
YES
Is the RF waveform
at TP RF distorted?
YES
Proceed to the Tracking
section
5.2.4 Tracking section
When the disc is rotated
at first:
Is the tracking error
signal output at TP TE?
www
Check IC521.
.
1-28 (No.MA125)
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NO
Is the wiring for IC521
pin 40 correct?
NO
NO
Is 6V or 2V present at
IC561 pins 4 and 5?
NO
Check IC561.
When the lens is
moving:
4V
Does the S-search
waveform appear at
IC561 pins 8 and 9?
YES
NO
Is 4V present between
IC561 pins 6 and 7?
YES
Check the spindle motor
and its wiring.
NO Check the circuits in
the vicinity of IC501
or the pickup.
NO
Check the circuits in
NO
the vicinity of IC501
pins 2 and 7.
Approx. 1.2V
YES
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2 9
8
YES
Is 5V present at IC561
pins 3,12,21?
YES
Check the vicinity of
IC521.
YES
Check the feed motor
connection wiring.
Check the circuits in
NO
the vicinity of IC561
pins 8 and 9.
YES
Check the pickup and
its connections.
Q Q
NO
Is 4V present at IC521 3 6 7 1 3 1 5
pin 41?
YES
Check the vicinity of
IC561
NO
Check the pickup and
its connections.
co
.
9 4 2 8
NO
Check CD 8V.
NO
0 5 8 2 9 9 4 2 8
Check IC521.
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9 9
9 9