What can go wrong:
Constant offset of 60mV, no adjustment possible – the power bipolars are inserted the
wrong way
Shunt regulator LEDs do not light up – check for short circuits on the buffer or the
connection
Wandering offset, thermally very sensible – check the input ground connection (both „RIAA
EXT“ connections must be connected to the buffer PCB)
Random offset, no adjustment possible: Check the output connection, it must go back to
the main PCB, otherwise the Servo does not work
Please check diyaudio.com, section „Analog Source“, thread „Paradise Builders“ for news
and updates. This is also a perfect place to ask questions.