K4900 Jitterz

FrizzleFried

Well-known member

Donor 2011
Joined
Mar 20, 2007
Messages
54,193
Reaction score
5,245
Location
NAMPA, Idaho
I recapped a K4900 that worked great, had great geometry but had difficulty focusing. The caps appeared old as well. After recapping the focus is a little better, but now I have the jitters. The whole screen slightly vibrates up and down (in a vertical cab, so side to side on a horizontal monitor). I mean like a half pixel kind of viberate. Any suggestions where to look?

Thanks...
 
Your horizontal hold pot may need replacement. Does tweaking it do anything? What's your B+ running at?
 
Where do you check the B+ on this chassis? What should it be at and where do you adjust it?
 
Also make note of the sixth or seventh post in that thread. The B+ is not adjustable on 4900's. It is either good, or you have a problem.

Bad focus on a 4900 is "usually" the fly crapping out, which is very rare.
 
Back
Top Bottom