Re: Projection TV convergence problem? What does this picture show?


ZZactly@xxxxxxx wrote:
First of all, you cannot just switch red and blue. There were old Sonys
that had the red and blue well matched and the convergence affected
them somwhat like the middle set of rings on a tri-color CRT.
Thanks, it seemed to me to be a decent test but I unjderstand it may
not have.


Now, OP, you have confused the issue switching *** around, show me the
crosshatch with the connections correct.
I will do this but the crosshatch was basically identical to what I
showed and that is why I posted it.

Put the thing how you found it, post a pic then, then I will look at
it. From the pic you have, you have a foldover, but not a real bad one,
it is more like a voltage amp clipping.

I appreciate your help.

Then this could also very easily be a fault in the blue channel of the
DCM. Do you know how to definitively check if the STKs are good with a
scope ?. Also, you can't even do it in that set without extreme
I don't but I do have the equipment to do it. If you point me in the
right direction I should be able to scope it.
measures. jusat hook it back up right and let me see it.

You might find that a resistor, say a 1 ohm, overheated and became
LOWER, like 1/4 ohm. I have had it happen.
I checked the resistors with a 4 wire ohm meter and all were within 0.1
ohm of value.

You might find a leaky Zener diode, All kinds of parts that cost less
than a dollar. Which one ?

First thing, is to put it back together, I don't mean the back, but I
wanna see all three colors with each hooked up to the proper outputs.
This color switching technique doesn't work anymore. I need to see the
problem, not the problem as modified by you.
I will do this.. Unfortunately I'm no where I can acccess the TV now
but I will do this shortly.

Put the thing back right, don't put it together, I couldn't care less
if your cat crawls in there. UNtamper the set and show me the picture,
and tell me if it is with new STKs, and where they came from and if
there was a change in the symptom after their replacement.

I purchased new STKs from someone on ebay. I only replaced the one
controlling the red channel. Symptoms didn't change after I replaced
it.

Then we can proceed.

Any of you out there wonders why it costs $300 to fix these things,
take a crack at it.

I truly appreciate your help. It seems to me that it should cost more
than $300 when paying someone to fix. Either you have someone who is
really talented and deserves high hourly pay or you have someone who
isn't and just replaces everything at the board level to find what's
wrong. Either way you pay a lot.

JURB

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