Re: NAD 3020



My sincerest apologies Michael I wasn't aware of the protocol in this
newsgroup!

Omer


"Michael A. Terrell" <mike.terrell@xxxxxxxxxxxxx> wrote in message
news:44B9B70C.F95719FE@xxxxxxxxxxxxxxxx
Omer Suleimanagich wrote:

This is a twenty five year old integrated amp with a defective left
channel.

From my plug 'n' play computer experience I replaced what I thought
could
be bad, I replaced the 180 ohm resistor, 2N2955 , 2N3055, 2N6551,
2N6554,
and BD 139. Even after doing all of this the left channel reads 25
volts
on the multimeter where the speaker is supposed to be connected!

What is even more unusual, is that the feeds to the power transistors on
both channels read 62 volts, and the wires to the bridge rectifier read
62
volts AC with no load.

At present, the right channel barely works as well.

Omer

Name: NAD_3020.pdf
NAD_3020.pdf Type: Acrobat (application/pdf)
Encoding: x-uuencode

Name: NAD_3020s20.pdf
NAD_3020s20.pdf Type: Acrobat (application/pdf)
Encoding: x-uuencode




This is NOT a binaries nesgroup. This should have been posted on
news:alt.binaries.schematics.electronic or even
news:alt.binaries.pictures.radio if you want people to see it.
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida


.



Relevant Pages

  • Re: NAD 3020
    ... Even after doing all of this the left channel reads 25 ... both channels read 62 volts, and the wires to the bridge rectifier read ... NAD_3020s20.pdf Type: Acrobat (application/pdf) ...
    (sci.electronics.misc)
  • Re: NAD 3020
    ... This is a twenty five year old integrated amp with a defective left channel. ... Even after doing all of this the left channel reads 25 volts ... NAD_3020s20.pdf Type: Acrobat (application/pdf) ...
    (sci.electronics.misc)
  • Re: HK 930 receiver blows right channel speaker fuse.
    ... A high enough voltage will cause the DC protection to kick in. ... Left channel when power switched *on* using analog meter across left channel speaker outputs: ... DC volts goes to 16-17 volts ...
    (rec.audio.tech)
  • Re: HK 930 receiver blows right channel speaker fuse.
    ... A high enough voltage will cause the DC protection to kick in. ... Left channel when power switched *on* using analog meter across left ... DC volts goes to 16-17 volts ... Left channel when switched *off* using analog meter across left channel ...
    (rec.audio.tech)
  • Re: HK 930 receiver blows right channel speaker fuse.
    ... A high enough voltage will cause the DC protection to kick in. ... Left channel when power switched *on* using analog meter across left ... DC volts goes to 16-17 volts ... Left channel when switched *off* using analog meter across left channel ...
    (rec.audio.tech)