321 gain board mods

[billinjapan]

Have just upgraded my 321 boards to 82 spec as per the acoustica site. One board sounds fine, the other won`t pass a signal. On the good board the 330K resistors all measure 310-315K, on the board, the 3 measure about half their rated value, ie 165-170K. Have checked everything visially and w/ a meter, the only discrepancy seems to be these resistor values.
Insights or advice much appreciated.

 

[Jo Sharp]

sounds like you have either a dry joint or a short somewhere. Suggest you start by re-soldering the new resistors and trying again.

 

[billinjapan]

Thanks - looked at everything w/ a magnifying glass, but will recheck.

 

[Jo Sharp]

Any luck with diagnosis?