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Chip Amps Amplifiers based on integrated circuits

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Old 14th December 2012, 01:30 PM   #1
vassiliadisk is offline vassiliadisk  Greece
diyAudio Member
Join Date: Feb 2011
Default DENON PMA 680R

Hello All!!!

I could use some help and advice for the above amplifier: The balance knob does not work. When the source direct is enabled, the amplifier works fine. When it is not enabled, the right channel is off. Can anybody tell me what would be the equivalent circuit if I wanted to completely remove it from the pcb? Does anyone have the service manual?

kind regards,
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Old 23rd December 2012, 08:47 PM   #2
Jerry Markatos is offline Jerry Markatos  United States
diyAudio Member
Join Date: Dec 2012
Default Service manual availability

Yia Sou... Kala Xristouyenna!

I looked on eBay and found that there is a current post offering a service manual for what may be a suitable price, mailed from the UK:

Denon PMA 680R Service Manual | eBay

Denon PMA-680R Service Manual

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servicemanualseu (4597 Feedback Score: 4597 ) About servicemanualseu
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Item condition:
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Time left:
24d 00h (Jan 16, 2013 13:33:05 PST)
More than 10 available
GBP 5.99
Approximately US $9.69
Buy It Now
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Old 27th December 2012, 02:07 PM   #3
vassiliadisk is offline vassiliadisk  Greece
diyAudio Member
Join Date: Feb 2011
thanks for the reply Jerry!

Happy New Year!
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