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Simple and fast...
The diagrams are clear and legible; i have been a great help.
The site is very reliable and precise thanks.
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Very easy site. Great service and quick release for download. Manuals are of good quality.
Joop - The Netherlands
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Very good manual, in depth and complete. Only criticism is that some of the circuit diagrams are slightly blurry and hard to follow for long periods of time, but this is to be expected. Perfect for any maintenance required. Also contains the wiring diagrams of the control cable for constructing extensions.
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Received a quick response, material was exactly what it was supposed to be. The service did everything I expected it to do. would use service again.
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Detailed SONY CFD980 Service Manual at an easy to find one stop shopping. Make my radio hobby technically interesting. Thanks.
KD-SX992R/KD-SX921R
Feed Section
Is the voltage output at IC541 pin "53" 5V or 0V? NO Is the wiring for IC541 (90) ~ (100) correct? NO YES NO YES YES Is 5V present at IC501 pin "20"? YES Check the vicinity of IC541. Is 6V or 3V present at IC501 "10" and "11"? NO Check IC501. Check the feed motor connection wiring. NO Check CD 9V and 5V.
Is 4V present at both sides of the feed motor? YES Check the feed motor.
Focus Section
When the lens is moving: NO Check the circuits in the vicinity of IC501 pins "15" ~ "18". YES YES Check the pickup and its connections.
4V
Does the S-search waveform appear at IC501 pins "6" and "7"?
Spindle Section
Is the disk rotated? YES YES Does the RF signal appear at TP1? YES Is the RF waveform at TP1 distorted? YES Proceed to the Tracking section NO Check the circuits in the vicinity of IC521 "16" the pickup Check the spindle motor and its wiring. Check the vicinity of IC501. NO Is 4V present at IC501 pins "8" and "9" ? NO Is 4V present at IC541 pin "55" ? YES NO Check IC521 and IC541.
NO
Tracking Section
When the disc is rotated at first: YES Approx. 1.2 V Is the tracking error signal output at IC521 "12"? YES Check IC541. Check the circuit in the vicinity of IC521 pins "2" ~ "12". YES Check the pickup and its connections.
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