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Excellent quality, helped to fix problem. Thank you very much!!!!
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I thank Owner-Manuals.com for providing the necessary manual very quickly, and it was very helpful in repairing my personal Audio System and I once again thank them for the wonderful customer's service satisfaction.
Thanks.
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Everything fine: quick service, no glitch and above all a very good quality of the Pdf file. Thank you!
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The manual was complete, parts list, adjustment procedures, etc. No worries
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Very usefully, I could find the trouble clearly with that manual.
NO.13 FLOW CHART NO.15
The drum motor fails to run. No head switching pulse.
Is the voltage more than about 2.6V NO Check IC701. Is the drum motor rotating? See FLOW CHART NO.13,14. DC given out pin(46) of IC701?
YES YES
Is the supply voltage of 5V feed to Is the PG signal and drum FG NO Are there drum PG M.M.signal at pin(3) IC706? pin(81) of IC701? Check PC 5V line. signal present on pins(66) and (65) of IC701, respectively?
YES YES NO
YES
Is the voltage more than about 2.6V NO IC706.
NO
Check C723 and readjust R701 Check between pin(46) of IC701 (HEAD SW. POINT control.) applied at pin(2) of IC706? and all the way up to pin(2) of
YES Replace IC701.
Is the supply voltage of feed to Check AT 12V line. pin(21) of IC706? Are the PG and drum FG YES signals present on pins(7) and (8) of IC706?
NO
Could be lines between IC706
YES and IC701.
Check or replace drum motor. Check peripheral circuit of IC706.
41
FLOW CHART NO.14
Replace IC706.
NO
The drum motor runs only for a few seconds.
Is drum PG signal given out NO Check pins (4), (5), (6) of IC706 and pin(7) of IC706? periperal circuits.
YES
Check or replace drum motor.
Is drum PG signal given out of
pin(66) of IC701?
Check line between pin(7) of IC706 NO and all the way up thru to pin(66) of IC701.
YES
Is V-H.SW.P pulse given out of NO
Check IC701. pin(23) of IC701?
YES
VC-A312T/A315T VC-H812T/H815T
Replace IC701.
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