Topic: Fixing my FireFace 802
Hi! I'm new here, so greetings to everyone.
I bought a second hand 802 a few weeks ago and it came with mic pre number one dead.
I opened the unit up and immediately saw a bulging capacitor.
Changed that capacitor, not working and a few days later the new one was bulged, so it wasn't a dried cap, there must had been a problem with tension voltage, and indeed it wasn't over voltage but 6v negative volts at positive side.
I went straight to the THAT1510 IC, which is the mic pre in fact. That bulging cap works in series with a pot to control the gain. Some weird voltages were found there:
Only those +15V and -15V should be found on V+ and V- respectively.