This rear proj. TV has no vertical hold until about 5 minutes of warm up. Leave it off for
30 minutes and you have to wait 5 minutes again.
Any ideas?
Thanks,
Don
30 minutes and you have to wait 5 minutes again.
Mits. VS-4506R Lost vertical hold
Nov 06, 2007
7 Replies
30 minutes and you have to wait 5 minutes again.
High ESR caps in the vert section. Got a schematic?
No.
:(
db
These guys do for a $20 download
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If you're lucky maybe someone will chime in and tell you where exactly to look, I can't.
However what I would do would be to figure out where the circuitry is, wait until the vertical syncs up and dribble some cooler a drop at a time on some of the caps while monitoring the screen. If you hit the right one the vert will fall out of sync immediately. It's a hit or miss proposition without a schematic and not something a tech doing this for a living would consider except for a last ditch effort.
This is how I've always found intermittent parts..
What would be a better (more pro) solution to tracking down the problem?
I would like to learn.
Thanks,
Don
Scope, signal generator, DVM and a service manual with waveform test points.
I will check tonight.
As a matter of fact it does have PIP. I just never use it.
Thanks, Don
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