Hifonics brx1516. 1D audio output level low.

[rhempz01]

I have a hifonics. That seems to be working, but if I push I high signal into the amplifier and turn the gain all the way up, it will not reach clipping. So I believe the output is too low, maybe the muting curcuit or bias is off somehow? Some help is most welcome.

 

[bl4ckw1d0w]

I am having the same issue in the new Hifonics with that audio driver board. I am assuming its the MC 1200.1D with the single IRS21844s?

 

[twilliar]

That is the 21844 chip. Almost the same board as the 2000.1 PZX
You should see a small negative low side square at the resistor next to R60 and the high side square at r66. What is the R2R voltage for that amp?
No input needed

 

[Perry Babin]

Please don't post in a repair thread that was started by someone else unless you are trying to help them.

Start a new thread.