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Old 21st Oct 2018, 1:50 pm   #22
Anthony
Hexode
 
Join Date: Sep 2006
Location: Hertford, Herts. UK.
Posts: 338
Default Re: Tektronix 475: No Horiz Sweep

Mr. B
Thank you. I did eventually realised that a summing transistor would not reveal much with voltage measurements. I also, as you suggest, already tried disconnecting all other inputs, Q1332 and the other 2 coaxs - made no difference. Nor does lifting CR1337.

Of course I am only able to look at one side of the board without removal, maybe there are horrors on the other side?

I wonder about breadbording Q1338 and 1344 - seems a bit desperate!
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