[Amps] Alpha 89 thermistor question

[David Donnelly]

I have a faithful Alpha 89 which has served well over the past 25 or so
years, except for one annoying problem - it randomly gives a 'temperature'
fault for no apparent reason, requiring the 3 min reset. The control board
has a 'temperature' input but no thermistor is indicated on the schematic or
on the parts list.

 

Does anyone know where the temperature sensor resides or how it works?

 

Many thanks for any help

 

Dave, K2SS/7