JVC KD-AR470 Service Manual page 15

5.1.3 Spindle section
Is the disk rotated?
NO
Is the voltage output at
pin 15 and pin 15 of IC681?
NO
Is the voltage input at pin
26 of IC681?
NO
Is the voltage output at pin
41 of IC621?
NO
Is the power supply
present at pin 6, pin 15,
pin 25, pin 39, pin 43,
pin 51 and pin 64 of IC621?
NO
Check the connections
of CD8V power supply.
5.1.4 Tracking section
YES
Does the RF signal appear
at RF output of IC601?
YES
Check the spindle motor
and its wiring.
Is the power supply
YES
present at pin 10, pin 19
and pin 28 of IC681?
NO
Check the connections
of CD8V power supply.
Check the connections
YES
between IC621 and
IC681.
YES
Check IC621.
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error
signal output at pin 11
of IC601?
NO
Check the circuits in
IC601 or the vicinity
of IC601.
NO
Replace IC601 or repair
the malfunction
connection point
YES
Is the RF waveform
at TP RF distorted?
NO NO
Check the circuits in
the vicinity of IC601
or the pickup.
YES
Check IC681.
YES
Check IC621.
YES
Check the pickup and
its connections.
YES
Proceed to the Tracking
section
(No.MA232)1-15