JVC KD-G321 Service Manual

(No.MA236)1-17
SECTION 5
TROUBLESHOOTING
5.1 Feed section
5.2 Focus section
Check the feed motor.
Is 4V present at both
sides of the feed motor?
YES
NO
Is the voltage output at
pin 4 and pin 5 of IC501?
Is the power supply
present at pin 3, pin 12
and pin 21 of IC501?
Check the connections
between the feed motor
and IC501.
YES
NO
Is the voltage input at pin
28 of IC501?
YES YES
Check IC501.
NO
Check the connections
of CD8V power supply.
NO
Is the voltage output at
pin 7 of IC521?
Check the connections
between IC501 and
IC521.
YES
NO
Is the power supply
present at pin 37,
pin 49, pin 53, pin 56
and pin 72 of IC521?
YES
Check IC521.
NO
Check the connections
of CD8V power supply.
When the lens is
moving:
Does the S-search
waveform appear at
IC501 pins 8 and 9?
4V
Check the pickup and
its connections.
YES
NO
Is the voltage input at pin
15 of IC501?
YES
NO
Is the voltage output at
pin 13 of IC521?
NO
YES
Check the connections
between IC501 and
IC521.
Is the power supply
present at pin 3, pin 12
and pin 21 of IC501?
YES
Check IC501.
NO
Check the connections
of CD8V power supply.
Is the power supply
present at pin 37,
pin 49, pin 53, pin 56
and pin 72 of IC521?
YES
Check IC521.
NO
Check the connections
of CD8V power supply.
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3
7
6 3
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0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
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JVC KD-G321 Specifications

General

Brand	JVC
Model	KD-G321
Category	Car Receiver
Language	English