idle current i(bias) is slowly dropping in one channel - diyAudio
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Old 20th September 2014, 02:32 AM   #1
jlk is offline jlk  Denmark
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Join Date: Sep 2014
Default idle current i(bias) is slowly dropping in one channel

Hi, I have a hk6800 amplifier where the left channel can't keep the idling current bias setting on 39mv. Every 15-30 min. it is decreasing around 1-3 mv. until the sound gets bad. Can it be caused by a bad transistor on the output pcb 5 ?

Last edited by jlk; 20th September 2014 at 02:40 AM.
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