r1000 in protect mode

Thespeakerdude8

Super Member
Just got a clean r1000! Unfortunately, she's in protect mode. Testing DC offset before the speaker relay shows something weird: right channel close to 0mv, left channel - 5vdc! What the? Adjusting dc offset in can get close to nulling it out, around -1v before it goes positive 3v. Right channel adjusts normally at the same time. Left heat sink heats up pretty good too. Pulling the molex connector on the left amp brings her out of protection, so it's isolated to the power amp somewhere.

However, I pulled the left amp off the sink and checked all the outputs and drivers with a diode test....all checked good...all caps checked good for esr too. So far as I can tell, no blown outputs or drivers? Something is forcing the amp to bias hungry? Is my stk3056 V-amp dead?:( how do I test the v-amp? Thanks in advance for any help!
 
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