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Default Tektronics 464 - Sweep generator problem

My Tektronix 464 does not generate any sweep. X-Y is ok, voltages are ok.

Is it normal, that U980 (sweep control IC) is getting "hot"? I can
hardly touch it for more than a few seconds.

I can see the trigger signal at pin1 of U980 but no other signal except
DC-levels on any other pin.

Thanks for any hint,
Falk
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Default Tektronics 464 - Sweep generator problem

Falk Willberg wrote in
:

My Tektronix 464 does not generate any sweep. X-Y is ok, voltages are ok.

Is it normal, that U980 (sweep control IC) is getting "hot"? I can
hardly touch it for more than a few seconds.


it should not be that hot.


I can see the trigger signal at pin1 of U980 but no other signal except
DC-levels on any other pin.

Thanks for any hint,
Falk




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