Re: Onkyo TX-NR838 Preamp board

Thanks for the comments. I contacted both Onkyo and the nearest authorized service rep and they both were of no help. They will not sell the board at all. I will keep my eyes out on ebay etc and hope that one comes up. I know the same board was used on the 737 model as well.

The board was so badly burnt that I threw it out.

I recently purchased a used 838 that had gone into protect mode. Upon investigation, I found that the SR section of the preamp driver board had several shorted transistors and burnt components. This section of the board was badly burnt with some of the copper runs pulling away. I was not able to source any of the transistors, so I cut the board in three pieces and plugged the SBR section into the SR connector on the main amp board. The receiver is back up and running but only as a 5.1 system. Does anyone know where I may be able to source either an entire good board (part #bccla-1579), or even...

Re: New Members - please post your introductions here

Hi everyone,

I have been dabbling in electronics for quite a while. I am currently working on AV receivers in an effort to better understand them. I am looking forward to all of your guidance.