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The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.
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Welcome. The scheme is clearly helped me to repair. Worth to download it.
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Excellent manual, very clear, technical specification provided, useful information regarding adjustment and set up.
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fast and easy and exactly what I was looking for. Not the cheapest but value for money after all.
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The manual for the Sansui P-L75 was not one of the more informative turntable manuals around but for $5 it was helpful enough.
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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Parts Catalog Parts Catalog only. It's available in PDF format. Useful, if Your equipment is broken and You need t…
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