JVC KD-AVX2J - Troubleshooting

(No.MA254)1-33
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 17 and pin 18 of IC201?
Check the connections
between the feed motor
and IC201.
YES
NO
Is the voltage input at pin
24 of IC201?
NO
Is the voltage output at
pin 91 of IC301?
NO
YES
Check the connections
between IC251 and
IC301.
YES
Is the power supply
present at pin 14
of IC251?
YES
Check IC251.
NO
YES
Check IC301.
NO
Check the connections
between the card wire
and CN401,CN965.
Check the voltage output
of 5V SW regulator.
Is the power supply
present at power supply
pins of IC301?
When the lens is
moving:
Does the S-search
waveform appear at
IC201 pins 13 and 14?
4V
Check the pickup and
its connections.
YES
NO
Is the voltage input at
pin 3 of IC201?
NO
Is the voltage output at
pin 145 of IC301?
YES
Check the connections
between IC251 and
IC301.
YES
Is the power supply
present at pin 14
of IC251?
YES
Check IC251.
NO
Check the voltage output
of 5V SW regulator.
NO
YES
Check IC301.
NO
Check the connections
between the card wire
and CN401,CN965.
Is the power supply
present at power supply
pins of IC301?