2 questions:
1) The service manual for this receiver says to set the offset to 15mV. But it seems like it can go lower. Should I target 15mV, or try for 0mV?
2) The right channel reads out around 1mV. But using the adjustment pot, it won't go below around .5mV, or higher than around 1.9mV. This seems odd to me, as the left channel pot will adjust to a much larger range. I just recapped the amp board, and replaced the adjustment pots with some bourns 3299 pots.
I guess my question is :
Is it possible that the offset in the right channel is so naturally close to 0 that the adjustment pot isn't going to move the value much? Or do you think that there may be a problem somewhere? The amp sounds good, so I don't think there's a problem.
Thanks,
Jim
I can't say for sure if the new pots are OK. I'm pretty sure they're installed correctly. I'll need to double check all of that.Are you sure that your new pots are OK, and connected correctly?
Did your amp adjust OK before new caps and pots?
Actually the manual does NOT say to set the offset to 15mV. It makes no mention of offset. In fact, it makes no mention of what the adjustments are at all. It's obvious to a skilled or trained technician however, that the adjustments are idle/bias current adjustments. They should indeed be adjusted for 15mV's across the TP's. Make sure you have good contact to the TP's with your meter while measuring. If you can't adjust the bias then you have problems and I'd suggest you start by checking your work carefully considering you say you were able to adjust prior to your tinkering. Start a thread in the Pioneer forum.2 questions:
1) The service manual for this receiver says to set the offset to 15mV. But it seems like it can go lower. Should I target 15mV, or try for 0mV?
2) The right channel reads out around 1mV. But using the adjustment pot, it won't go below around .5mV, or higher than around 1.9mV. This seems odd to me, as the left channel pot will adjust to a much larger range. I just recapped the amp board, and replaced the adjustment pots with some bourns 3299 pots.
I guess my question is :
Is it possible that the offset in the right channel is so naturally close to 0 that the adjustment pot isn't going to move the value much? Or do you think that there may be a problem somewhere? The amp sounds good, so I don't think there's a problem.
Thanks,
Jim