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7854: Excessive stored trace brightness.


 

Hello all,

I'm kind of getting around to poking at my 7854 scope.

The stored trace brightness is excessive, and the adjustment won't go
down any further. I'm reasonably certain the pot is good, since
it'll smoothy vary over what range it does have. (From "too bright",
to "cr*p, I'd better turn that down before the CRT gets burnt").
Normal display, and readout's are of a more reasonable intensity, and
have goodly range. (Readout isn't working correctly, but that's
not the problem I want to concentrate first on.)

Before I crack the covers, any suggestions of which parts of the
service manual would be most relevant to read...

thanks in advance...

David

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