1-16 (No.MA247)
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 12 of IC541?
Check the connections
between IC501 and
IC541.
YES
NO
Is the power supply
present at pins 8,16,25,
28,32,53,71 and pin 90
of IC541?
YES
Check IC541.
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.
Is the power supply
present at pins 8,16,25,
28,32,53,71 and pin 90
of IC541?
YES
NO
Is the voltage input at pin
15 of IC501?
YES
NO
Is the voltage output at
pin 9 of IC541?
NO
YES
Check the connections
between IC501 and
IC541.
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.
YES
Check IC541.
NO
Check the connections
of CD8V power supply.
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