QSilver
Super Member
I got it this week and at first it worked well. DC offset is 4mV on one side and 14mV on the other. I checked and set the idle current to 22mV as per the manual. But Then it started going into protection.
I checked the idle current and dc offset and it was still ok, so I changed the capacitors over on the protection board. Still no luck. I then decided to measure the voltage on the over current protection pins (5 and 6 on the output assmebly) and here is the strange thing. When I measure it with either of my two DMMs, the amp immediately goes into protection and stays there until I remove the meter probe.
The voltage readings starts out at 6VDC then drops down to between 1.8 and 2.5.
I next lifted the legs of D3 and D4 on the output board and if I probe anything from these two diodes, either side of R23 or the collector of Q2, it instantly flicks into protection.
Can anyone explain whats going on? My meters are set up correctly... does it point to a faulty transistor?
I checked the idle current and dc offset and it was still ok, so I changed the capacitors over on the protection board. Still no luck. I then decided to measure the voltage on the over current protection pins (5 and 6 on the output assmebly) and here is the strange thing. When I measure it with either of my two DMMs, the amp immediately goes into protection and stays there until I remove the meter probe.
The voltage readings starts out at 6VDC then drops down to between 1.8 and 2.5.
I next lifted the legs of D3 and D4 on the output board and if I probe anything from these two diodes, either side of R23 or the collector of Q2, it instantly flicks into protection.
Can anyone explain whats going on? My meters are set up correctly... does it point to a faulty transistor?