1-14 (No.MA233)
SECTION 5
TROUBLESHOOTING
5.1
Trouble shooting (For KD-G120, KD-G120R, KD-G123, KD-G124,KD-G125 and KD-G126)
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 4 and pin 5 of IC541?
Is the power supply
present at pin 3, pin 12
and pin 21 of IC541?
Check the connections
between the feed motor
and IC541.
YES
NO
Is the voltage input at pin
28 of IC541?
YES
YES
Check IC541.
NO
Check the connections
of CD8V power supply.
NO
Is the voltage output at pin
21 and pin 22 of IC561?
Check the connections
between IC541 and
IC561.
YES
NO
Is the power supply
present at pin 4, pin 50,
pin 60 and pin 72 of IC561?
YES
Check IC561.
NO
Check the connections
of CD8V power supply.
When the lens is
moving:
Does the S-search
waveform appear at
IC541 pins 8 and 9?
4V
Check the pickup and
its connections.
YES
Is the voltage input at pin
15 of IC541?
YES
Is the voltage output at
pin 28 of IC561?
NO
YES
Check the connections
between IC541 and
IC561.
Is the power supply
present at pin 4, pin 50,
pin 60 and pin 72 of IC561?
YES
Check IC561.
NO
Check the connections
of CD8V power supply.
Is the power supply
present at pin 3, pin 12
and pin 21 of IC541?
YES
Check IC541.
NO
Check the connections
of CD8V power supply.
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