(No.MA245)1-15
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 7 of IC521?
Check the connections
between IC501 and
IC521.
YES
NO
Is the power supply
present at pin 37,
pin 49, pin 53, pin 56
and pin 72 of IC521?
YES
Check IC521.
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.
YES
NO
Is the voltage input at pin
15 of IC501?
YES
NO
Is the voltage output at
pin 13 of IC521?
NO
YES
Check the connections
between IC501 and
IC521.
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.
Is the power supply
present at pin 37,
pin 49, pin 53, pin 56
and pin 72 of IC521?
YES
Check IC521.
NO
Check the connections
of CD8V power supply.
Summary of Contents for KD-AR370J
Page 255: ... M E M O ...
Page 264: ...2 9 Function section for KD AR370 KD G320 KD G424 KD G425 R517 R514 C517 R518 15k 5 6k 5 6K ...
Page 272: ...2 17 Function section for KD G421 R51 R514 R518 L 15k 5 6K ...
Page 280: ...Function section for KD G427 R R518 15 5 6K 2 25 ...
Page 287: ... M E M O ...
Page 309: ...3 21 MEMO ...