Hi, is there anyone who can say what RV104 adjusts? nothing is described in the Service Manual about this.
Sincerely
Soren
Link to service manual NAD C275BEE - Manual - Stereo Power Amplifier - HiFi Engine
Sincerely
Soren
Link to service manual NAD C275BEE - Manual - Stereo Power Amplifier - HiFi Engine
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Somewhat off topic, but I thought I'd throw this in here anyway. My C275BEE was set up with the auto-power-on trigger (NAD ATOL) using audio signal level and I found the trigger threshold was way too high for quiet listening. The amp kept turning off while powering Acoustat 0.88+0.88s (DIY 1+1s with 8" panels.)
The solution was to bypass R254 and R260 on the main board (both 330k resistors) with 33k resistors. This can be done from the top of the board without dismantling it from the unit. This increases the gain of the trigger signal comparator op-amps by an order of magnitude and allows very low level triggering.
The solution was to bypass R254 and R260 on the main board (both 330k resistors) with 33k resistors. This can be done from the top of the board without dismantling it from the unit. This increases the gain of the trigger signal comparator op-amps by an order of magnitude and allows very low level triggering.
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Ha, thanks for flagging that so quickly Boydk. Now edited: you are correct, those should have read R254 and R260. I'm surprised NAD set the threshold so high. And they quote the threshold as three different values in various places: 1mV, 10mV and 20mV. I think it's closer to 20mV. I was surprised that nobody else found this to be almost useless since my speakers are some of the least efficient out there. It would have to be screaming loud if you had it hooked up to Klipsch speakers before it would turn on.
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