HI!
I'm working on a Marantz PM6002 and I wanted to adjust the DC offset and idle current as a last step.
I'm a little confused after I checking it in the service manual.
Should I connect dummy load to the outputs during dc adjustment?
What voltage should I set if the manual says +/- 50mV? Isn't it a bit high?
The idle current adjustment is clear, it is the same as a lot of other PM models.
I'm working on a Marantz PM6002 and I wanted to adjust the DC offset and idle current as a last step.
I'm a little confused after I checking it in the service manual.
Should I connect dummy load to the outputs during dc adjustment?
What voltage should I set if the manual says +/- 50mV? Isn't it a bit high?
The idle current adjustment is clear, it is the same as a lot of other PM models.
Quite straightforward.
Adjust R33/34 for as near as you can get to 0v DC.
If you couldn't get less than 250mv, that is not acceptable but less than 50mv is perfect.
20mA idle curren, I think is too high I always set them at 14mA or 3.5mv average, across each 0.22 Ohm resistor.
Don't stress over it, it makes little difference to the performance.
Adjust R33/34 for as near as you can get to 0v DC.
If you couldn't get less than 250mv, that is not acceptable but less than 50mv is perfect.
20mA idle curren, I think is too high I always set them at 14mA or 3.5mv average, across each 0.22 Ohm resistor.
Don't stress over it, it makes little difference to the performance.