JVC KD-AR470 Service Manual

1-14 (No.MA232)
SECTION 5
TROUBLESHOOTING
5.1 Trouble shooting (For KD-AR470, KD-G420, KD-G524 and KD-G525)
5.1.1 Feed section
5.1.2 Focus section
Check the feed motor.
Is 4V present at both
sides of the feed motor?
YES
NO
Is the voltage output at
pin 17 and pin 18 of IC681?
Is the power supply
present at pin 10, pin 19
and pin 28 of IC681?
Check the connections
between the feed motor
and IC681.
YES
NO
Is the voltage input at pin
24 of IC681?
YES YES
Check IC681.
NO
Check the connections
of CD8V power supply.
NO
Is the voltage output at pin
40 of IC621?
Check the connections
between IC621 and
IC681.
YES
NO
Is the power supply
present at pin 6, pin 15,
pin 25, pin 39, pin 43,
pin 51 and pin 64 of IC621?
YES
Check IC621.
NO
Check the connections
of CD8V power supply.
When the lens is
moving:
Does the S-search
waveform appear at
IC681 pins 13 and 14?
4V
Check the pickup and
its connections.
YES
NO
Is the voltage input at pin
1 of IC681?
YES
NO
Check the connections
of CD8V power supply.
NO
Is the voltage output at
pin 33 of IC621?
NO
YES
Check the connections
between IC621 and
IC681.
YES
Check IC621.
NO
Check the connections
of CD8V power supply.
Is the power supply
present at pin 10, pin 19
and pin 28 of IC681?
YES
Check IC681.
Is the power supply
present at pin 6, pin 15,
pin 25, pin 39, pin 43,
pin 51 and pin 64 of IC621?

JVC KD-AR470 Specifications

General

Brand	JVC
Model	KD-AR470
Category	Car Stereo System
Language	English