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Superb manual. Exactly what I ordered and made available in a very timely manner.
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very fast detailed and accurate hope to do business again
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This was precisely what I was looking for. Complete and good quality!
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This is the ONLY copy of this manual I could find for a realistic price. Even Panasonic could not provide me with one.
The PDF is a very good copy and it helped me diagnose and find the fault with the unit I have.
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Very complete and well reading drawings. Documentation is essential for successful repairs.Good documentation, with all that is necessary. This manual was what I was waiting with all the information necessary for the repairing I need it for. You must buy it if you want to do repairs or simply understand how it works.
SECTION 5 TROUBLESHOOTING
5.1 Feed section
Is the voltage output at IC541 pin 40, 5V or 0V
NO
Is the wiring for IC541 pin 40 correct?
YES
Is 5V present at IC501 pins 3,12,21?
YES
NO
Check CD 8V.
YES
NO
Check the vicinity of IC541.
YES
Is 4V present at both sides of the feed motor?
YES
NO
Is 6V or 2V present at IC501 pins 4 and 5?
NO
Check the feed motor connection wiring.
Check the feed motor.
Check IC501.
5.2
Focus section
When the lens is moving:
NO
Check the circuits in the vicinity of IC501 pins 8 and 9.
4V
Does the S-search waveform appear at IC501 pins 8 and 9?
YES
YES
Check the pickup and its connections.
5.3
Spindle section
Is the disk rotated?
YES
NO
Is 4V present between IC501 pins 6 and 7?
YES
NO
Is 4V present at IC541 pin 41?
YES
NO
Check IC541.
Does the RF signal appear at TP RF?
YES NO NO
Check the spindle motor and its wiring. Check the circuits in the vicinity of IC521 or the pickup.
Check the vicinity of IC501
Is the RF waveform at TP RF distorted?
YES
Proceed to the Tracking section
5.4 Tracking section
When the disc is rotated at first:
Approx. 1.2V
NO
Check the circuits in the vicinity of IC521 pins 2 and 7.
NO
Check the pickup and its connections.
Is the tracking error signal output at TP TE?
YES
Check IC541.
(No.MA110)1-25
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