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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!!!!!!!!
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Detailed schematic diagram, manual for professionals
NO.14 CAPSTAN TROUBLESHOOTING FLOW CHART NO.16 DRUM MOTOR TROUBLESHOOTING(2)
drum runs only for a few seconds. The capstan motor fails to run.
Replace IC706.
Check IC701. NO DC given out pin(29) of IC701?
Is the voltage more than about 2.6V NO
Is drum PG signal given out from the NO Check peripheral circuit of pins (4), (5) pin (7) IC706? and (6) of IC706.
YES
Is the supply voltage of 5V fed to NO Check PC 5V line. YES YES pin(8) of AC connector?
Check drum motor.
YES
Is voltage more than 2.6V DC the AC connector NO Is drum PG signal fed to pin(66) Check line between pin(7) of IC706 sent in pin(4) AC connector? pin(29) IC701? IC701? and pin(66) of IC701.
YES YES
voltage pin(3) AC Check line between the pin(92) of Is head switching pulse sent out from NO the pin(23) of IC701? Check MOTOR Vcc line and motor
YES
Check IC701. connector 1.6~2.7V? IC701 and pin(3) of AC connector.
YES
Is the supply voltage of 12V/20V fed NO voltage selector circuit. Replace IC701. to pin(5) of AC connector? (Q995, 996)
YES
FLOW CHART NO.17 HEAD SWITCHING PULSE TROUBLESHOOTING.
No head switching pulse.
Replace capstan motor.
41
Is the drum motor rotating? NO IC701, respectively? YES
Check PC 5V line.
FLOW CHART NO.15 DRUM MOTOR TROUBLESHOOTING(1)
See FLOW CHART NO.15, 16 (DRUM MOTOR TROUBLESHOOTING(1), (2))
YES
The drum motor fails to run.
Is the voltage more than about 2.6V NO Is the PG signal and drum FG DC given out pin(46) of IC701? Replace IC701. signal present on pins(66) and (65) of
Check IC701. YES
Is the supply voltage of 5V fed to pin
NO NO D-FG
(3) of IC706?
YES about 5Vp-p
DC given out pin(2) of IC706? and pin(2) of IC706.
NO Is the voltage more than about 2.6V Check line between pin(46) of IC701 D-PG
YES about 5Vp-p
Check M 12V line. pin(21) of IC706? Check line between IC706 and
NO Is the supply voltage of 12V fed to
Are the PG signal and drum
YES FG signal present on pins (7), (8) NO
YES of IC706?
IC701.
VC-SH970W VC-SH990W
Replace drum motor.
Check peripheral circuit of IC706.
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