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reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
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Manual was just as described!!! I odered it and in less than a day was able to download it and the text was clear and pages were all complete just as the original manual was. Purcashed this for a friend and they were more than happy. Perfect all around!
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Excellent service and prompt delivery. But it's not a manual - only 4 pages wiring diagrams.
Thanks.
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The manual I purchased was exactly what I needed to repair my Toshica television. The manual contained schematics and troubleshooting information that was very helpful.
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Il download del Service Manual JVC HR 4100 non é stato eseguito
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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