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Helpd me mont a new carradio when prewius mont was a mess.
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Very good service and quick service, very good quality of service manual!
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Great tape deck manual!
I'm very positively surprised, because it is a very long manual, lot of pages, drawings, diagrams, description of how to make the alignment and adjustment procedures.
It is as good as the old "Naka" manuals from the 1970's - if somebody have seen them, they know what I mean by that.
I recommend to buy this very much !
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I am a vintage hifi collector. No way to fix that device without the appropriate service manual...thanks to your site I got it and every thing is easier now. I got the manual right after ordering: fast cheap accurate ... thank you
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Wonderful job clear. Qick fantastic. These people are really good. If even a problem arise they are wonderful assisting you. These scheme is so net despite this is a very old TV. Thank you for everything!!!!!!!!
3.2
Troubleshooting
Feed section
Is the voltage output at IC621 pin "40" 5V or 0V? YES Is 4V present at both sides of the feed motor? YES Check the feed motor. NO Is 6V or 2V present at IC681 "16" and "17"? NO Check IC681. NO Is the wiring for IC621 pin "40"? NO YES Is 3.3V present at IC681 pin "6"? YES Check the vicinity of IC621. YES Check the feed motor connection wiring. Check CD 8V and 5V. NO
Focus section
When the lens is moving: 4V
Does the S-search waveform appear at IC681 pins "13" and "14"?
NO
Check the circuits in the vicinity of IC681 pins "13","14"and"1". YES
YES
Check the pickup and its connections
Spindle section
Is the disk rotated? YES Does the RF signal appear at IC601 pin "19"? YES Is the RF waveform at IC601 pin "19" distorted? YES Proceed to the Tracking section NO Is 4V present at IC681 pins "15" and "16"? YES Check the spindle motor and its wiring NO Check the circuits in the NO vicinity of IC601 pin "19" or the pickup NO Is 4V present at IC621 pins "41" ? YES Check the vicinity of IC681. NO
Check the circuits in the vicinity of IC621 or IC621
Tracking section
When the disc is rotated at first:
YES
Approx. 1.2V Is the tracking error signal output at IC601 "11"?
Check the circuit in the vicinity of IC601 pins "2" to "7".
YES
Check the pickup and its connections
YES Check IC621.
(No.49839)1-25
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