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7th December 2008, 01:25 PM
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diyAudio Member
Join Date: Nov 2005
Location: suffolk
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denom pma250 amp faulty,but no faulty parts found please help
Hi everyone working on a faulty denon pma 250 mk 3
Speaker relay not swiching due to dc rails on output,disconnected emitter outputs on left channel output stage ,speaker relay works, So far i have changed right channel output for left still same , taken out pre divers and tested with dmm (good) removed drivers and tested(good) Checked emitter resistors(good) checked all resistors ,and signal diodes all same as right channel Checked bias transistor and the pot same as right channel At a loss anyone any ideas Thankyou in advance
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