Hi
Recapped my BM1200 (Dillen’s kit). It works but there are some challenges I need help with. Here is the first -
Supply Voltage (33V target)
Input is set to 110 (USA). Am I taking the reading correctly? If so what could be the challenge?
1. What I though I should be doing: Attach the multimeter (DC auto) to 456 and ground off the power supply board = I get 55V and it does not change as I adjust 459.
2. Tried connecting to the neutral: Attaching to 456 and the neutral line = I get 28V, which does not change as I adjust 459.
3. Tried connecting to the 455 resistor the other side of 459 = The voltage changes (16-23V)as I adjust 459, but can not get 33V.
4. Just out of curiosity I attached across 456 and 459 = Voltage changes as I adjust 459. I can get 33V. But, do not believe this is in any way what I am trying to accomplish.
I continued to set the no-signal currents anyway, which I could get to 7.5mV. The unit plays an external input through Tape (slight hum as volume turned up, with no input), but of course I want to sort out the supply voltage challenge.
I took a reading off my BM1001 (which I have been using for a long time, input set to 110) and it is more like 4-5V at 456?!? I have never opened this one up before as it has never shown any issues. Thought it might be useful to compare.
Stuck!
Cheers.
