problem with an arcam cd73t

stvncar · 18th October 2005, 09:14 PM

help--i did an opamp upgrade on my arcam 73t and in the process lost the right channel completely. i replaced both op amps with the bb627's, and the one in between with an ad8066. i originally thought that the center one might be the problem, but that turned out to be ok. i had to desolder from the top of the board and did touch one of the resistors with the soldering iron accidentally, but i don't think it was enough to fry it. when switching the op amps, the same channel is out and the other one works fine. i tried desoldering and resoldering in case that was the problem, but to no avail. i'm unsure where to go next with this. any advice would be greatly appreciated.
steve

JonHarrison · 18th October 2005, 11:12 PM

Steve,

Do you have the schematics ?

Cheers,

Jon

rabbitz · 19th October 2005, 12:47 PM

Try the original op amp in the faulty channel. Always a good idea with these is to use an IC socket so you can swap and change easily and also stops and over heating of the op amp by soldering.

Soldering the op amp to the PCB is the recommended method but have had no problems using IC sockets.

18th October 2005, 09:14 PM	#1
stvncar diyAudio Member Join Date: Jan 2004 Location: new jersey	problem with an arcam cd73t help--i did an opamp upgrade on my arcam 73t and in the process lost the right channel completely. i replaced both op amps with the bb627's, and the one in between with an ad8066. i originally thought that the center one might be the problem, but that turned out to be ok. i had to desolder from the top of the board and did touch one of the resistors with the soldering iron accidentally, but i don't think it was enough to fry it. when switching the op amps, the same channel is out and the other one works fine. i tried desoldering and resoldering in case that was the problem, but to no avail. i'm unsure where to go next with this. any advice would be greatly appreciated. steve

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18th October 2005, 11:12 PM	#2
JonHarrison diyAudio Member Join Date: Mar 2004 Location: UK	Steve, Do you have the schematics ? Cheers, Jon

19th October 2005, 12:47 PM	#3
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Try the original op amp in the faulty channel. Always a good idea with these is to use an IC socket so you can swap and change easily and also stops and over heating of the op amp by soldering. Soldering the op amp to the PCB is the recommended method but have had no problems using IC sockets.

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