These tv sets are at work in a corner so i dont have the model numbers
but i`m sure some of you would have seen these by now .
Last years model . The cabinets are totaly plastic , the set is not very
tall .
I have 9 of these sets saved and all have severe convergence distortion
on the picture .
The convergence module on these hangs on the metal support that holds
the 3 tubes .
the module has 2 large STK chips on them that i suspect is the problem .

Is there a reason so many , perhaps ALL of these sets have this problem
? is there a hidden KNOWN problem on these making it a waste of time
ordering that many STK chips ?
The sets belong to a salvage store where i work on the electronics . I
am not an expert but can replace such parts . They dont want to spend
hundreds getting these fixed so a service shop is out .

Thanks.

I went looking on the net for these pieces of crap and cant find any .
They may be 2 or 3 years old ?? They are still coming in as store
returns so ??

First of all, use lateral thinking, later it will lead you to
omnidirectional thinking. Change the chips on ONE board and run it
through all the sets, one at a time. Make sure to check everything that
even looks fusible, and of course see it work in at least one set. Once
it works transfer the board from set to set. All the ones it works in,
order chips for them, and get one extra set for a board you keep, to
fix the rest.

You don't even have to screw the board in, just plug them in. The ones
that don't work, go farther, but at least (hopefully) get the bulk of
it out of there. ( or fixed, whatever ).

You need to get to know what the picture looks like without convergence
correction, this way you can make (in the future) an educated guess as
to what's wrong.

Once you got X amount of them fixed, go on to the rest.

Yes, I'm a pro, but I still work for an old horse trader. When you lack
detailed service info, multiple identical units are the best thing to
have.

JURB

Also, Inspect the sets throughly for any signs for coolant leakage from any
one of the three crts. This is a very common problem in Samsung / Akai RPTV
CRT sets. Any incidence of finding fluid will preclude how you will attempt
servicing them.
wrote in message
ups.com...
First of all, use lateral thinking, later it will lead you to
omnidirectional thinking. Change the chips on ONE board and run it
through all the sets, one at a time. Make sure to check everything that
even looks fusible, and of course see it work in at least one set. Once
it works transfer the board from set to set. All the ones it works in,
order chips for them, and get one extra set for a board you keep, to
fix the rest.

You don't even have to screw the board in, just plug them in. The ones
that don't work, go farther, but at least (hopefully) get the bulk of
it out of there. ( or fixed, whatever ).

You need to get to know what the picture looks like without convergence
correction, this way you can make (in the future) an educated guess as
to what's wrong.

Once you got X amount of them fixed, go on to the rest.

Yes, I'm a pro, but I still work for an old horse trader. When you lack
detailed service info, multiple identical units are the best thing to
have.

JURB

Thanks guys . I did look for coolant leaks and none had it but i have
seen it in the past and junked those sets for parts .

The models are Samsung HCM 4215W and AKAI PT4298HDX/SMS
Both models have P55A chassis .

I like the idea of buying 2 or 4 chips and try the circuit in all . I
did save a couple by using chips from leaker sets .
I was concerned a bigger problem caused these chips to fail in so many
sets .

Hey Ken, I have the same problem with my tv (Samsung HCM4215W) and was
wondering if you were able to fix yours. My local repairman said the
estimate was $300 for a convergence module, but from reading online, it
seems like I just need either two new IC's, or a new convergence board
with the two IC's. Any help?