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Re: Tektronix 145 PAL test signal generator - repair (oven control circuit and maybe more)

 

Luca,

R1156 is too hot. Replace with a 5W. Look around the TP1100 for bad parts. The thermistor could be open. Dirty pins/sockets could be the problem. Check the ripple in the power supply. At the age of this unit, recapping may be necessary.

Mark
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