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electonetalk · Electone Talk: For YAMAHA Electone users

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  • Members: 500
  • Category: Organ
  • Founded: Nov 30, 2000
  • Language: English
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ELECTONE STAGEA


EL DISK DATABASE (eldata.org)

A community for exchange of electone books, and also the disk data.

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Re: Yamaha D85 working but no amplification
Sounds good. Why are all four channels silent if only one amp has failed? The 42V would probably blow fuses if any are present to protect the speakers. Is
Posted - Tue Sep 7, 2010 2:57 pm
Bill Crunkhorn
ctsbillc
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Re: Yamaha D85 working but no amplification
IC301 is dead. (IC301(STK-085)Centre Channel= -42.7VDC) Ex.STK085 input pinNo,1 PinNo,6 -PowerVoltage PinNo,8+PowerVoltage 1:You should Remove IC301 . 2:Check!
Posted - Tue Sep 7, 2010 11:58 am
tnmshd
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Re: Yamaha D85 working but no amplification
Thank you again tnmshd and Bill, I have checked the pin 7 voltages on all 4 power amp IC's. Here is what they read: IC301(STK-085)Centre Channel= -42.7VDC
Posted - Tue Sep 7, 2010 8:55 am
Skippy
dieter.caspari
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Re: Yamaha D85 working but no amplification
You're doing pretty good actually. If all four amps have gone, something bad must have happened to fry them, like a power supply over-voltage fault. Is the
Posted - Tue Sep 7, 2010 1:48 am
Bill Crunkhorn
ctsbillc
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Re: Yamaha D85 working but no amplification
Check following item again .. PA1 and PA2 unit .Ther are 4 Power IC (STK080 ) If you get DC voltage on pinNo.7(output) ---------- STK080 is dead. and muting
Posted - Tue Sep 7, 2010 1:08 am
tnmshd
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