Sorry, overheating...
The amplifier working normaly, except that one channel is very hot. Bias is 60 times bigger than bias in other channel, and I can't adjusting it. Bias adjust trimmer is on the minimum, but bias current is too high. I don't have service manual or schematic. Power transistors are Onsemi "Thermal Track" NJL3281D/NJL1302D - 12 pieces per channel. Do anyone have an idea what could be the problem here?
The amplifier working normaly, except that one channel is very hot. Bias is 60 times bigger than bias in other channel, and I can't adjusting it. Bias adjust trimmer is on the minimum, but bias current is too high. I don't have service manual or schematic. Power transistors are Onsemi "Thermal Track" NJL3281D/NJL1302D - 12 pieces per channel. Do anyone have an idea what could be the problem here?
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