• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Marantz 2250 bias fluctuation

MartyGee666

New Member
Hey! I'm getting a wondering bias voltage across pins J708 & J710 (bias voltage). Its causing some annoying static and I'm not sure where I should look first. The unit has been re-capped and sounds great for the first hour, but eventually the bias fluctuates on the left channel and it throws the right channel out of spec also. It should be a steady 8mA, but this channel fluctuates from 4ma-15ma quickly and randomly. Some of the output transistors have been replaced, they all test well.

Has anyone experienced a bias voltage that does this?
 
Register to hide this ad
Back
Top Bottom