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In Reply to: RE: Marantz 250 amp circa 1975... posted by onemug on January 14, 2015 at 21:36:23
Just touch the meter leads to these points and set the bias
try this
Edits: 01/15/15Follow Ups:
When I went to set the bias 2 days ago, I used this method...but... touched the top and bottom transistor cases instead of the middle 2 as your pic shows.
Does either way work?
Honestly, I'm not sure. Should????
But it seemed to be OK. But don't go outside the recommended bias values. Those transistors and associated parts are old.
Actually you should recap that board and some of the resistors as well.
charles
n
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