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There are currently no product reviews.
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Great product, helped me to restore vintage walkman cassette.
Just some pictures could be little bit more sharp and contrast
Thank you
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I love older radio's and the service manuals that are sometimes hard to find. Was able to find a manual quite easily on this site.
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Thank you for your shop manual! Your help was very useful - the device is repaired! Once again - Thank you! I wish you a successful business! Edward (Russia).
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It was a great experience,instead of purchasing a new Stereo Amplifier ,in just minutes i repaired my old one and that was thaks to the manual I have purchased from you.
Thanks again.
Samuel Alter
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Das ging ja sehr unkompliziert hat bestens geklappt und die Quallität ist auch noch gut.
Vielen Dank dafür.
NO.13 TROUBLESHOOTING(1) FLOW CHART NO.14 DRUM MOTOR TROUBLESHOOTING(2)
The drum motor fails to run. The drum motor runs only for a few seconds.
Replace IC706.
VC-A10/A10S/A500 VC-A50/A50S/A50SB VC-A60/A75/A80S
Is the voltage more than about 2.6V NO DC given out pin(25) of IC701?
Is drum PG signal given out from the NO Check peripheral circuit of pins (22), (23) pin (33) IC706? and (24) of IC706.
Check IC701. NO
YES
Is the voltage more than about 2.6V Check line between pin(25) of IC701
NO YES DC given out and pin(12) (sankyo IC) of AC YES
of AC (kumaconnector or pin(32) (kumagaya IC) Check drum motor. gaya IC) IC706? of IC706.
Is drum PG signal fed to pin(47) of
Is the supply voltage 12V fed to NO IC701? and pin(47) of IC701. Check M 12V line. pin(8) (sankyo IC) of AC connector or pin(20) (kumagaya IC) of IC706? YES
NO YES Is head switching pulse sent out from
YES NO Check line between pin(33) of IC706
the pin(18) of IC701? Replace drum motor.
YES
Check IC701.
Replace IC701.
40
FLOW CHART NO.15 HEAD SWITCHING PULSE TROUBLESHOOTING.
Is the drum motor rotating? NO
YES
No head switching pulse.
See FLOW CHART NO.14, 15 (DRUM MOTOR TROUBLESHOOTING(1), (2))
Is the PG signal and drum FG YES
Replace IC701. signal present at pin(47) of IC701?
NO
D-PG 2.5V D-FG 2.5V
Check line between IC706 and IC701.
NO
Are the PG signal and drum YES FG signal present on pins (33), (34) of IC706? Check peripheral circuit of IC706.
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