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Great and quick support. The maual was exactly what I was looking for and my problem
solved. Many thanks.
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Very good service Within one day i received a pdf of the users manual and electric circuits so I was able to measure the different voltages in the printed circuit and find out the fault Payment was also reliable and easy.Without the manual i could not have repaired.So thanks to "Search for a manual"
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you are doing great job guys.....my father ask me to find out the schematics of Sony KV25R1D to sort out the problem ..(he was electrical technician, and excperianced with TV and simillar stuff). finally he found the cause and change all necessary parts....now he has got working old dog..and is very happy!!... thank you all.. NB..he also saved the repair cost.
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Perfect. Received my manual within 24 hours. Clear scan of the manual I needed. No problem.
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Item as described, very well detailed manual with complete schematics. I've received the download information shortly after payment, very good support.
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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