Sony KP-43T90 Convergence issues

huxley · Joined: 12 Mar 2009 Posts: 11

Hi all,

I'm a newcomer to this forum and I could use some help fixing a TV I recently purchased off craigslist. It turns on and works fine, but the convergence is majorly screwed up. Things are at angles, colors don't line up, etc. I was told this upon purchase and got a terrific deal on it, but I'm at a loss now as how to fix this.

The front knobs do nothing helpful. Flash focus can't seem to do anything either. A local service center adjusted the convergence in the service menu and saved the values. They charged $135 for this. This was back in late '06. I was told it was done there again somewhat recently but at that time they recommended replacement.

If anyone could suggest where I start I would greatly appreciate it. Also, I'm not sure if this is appropriate to ask, but if anyone has a PDF of the service manual (not the owners manual) that would be a big help.

Thanks!
Huxley

Justmanuals · Joined: 21 Aug 2004 Posts: 1948

This Parts & Service manual can now be purchased for $10.77 and downloaded immediately after payment from http://www.justmanuals.com

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Guest · Posted: Thu Mar 12, 2009 9:03 pm Post subject:

Hi Paul,

Thanks, but I can find the same manual for $5, I was just hoping someone out there might have a link to a free PDF of it. I also could use a walkthrough to get this thing converged using the in menu option. I know how to get it into the right mode but I'm at a loss once I'm there.

Thanks all,
Huxley

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

Start by replacing the STK392-150's and checking the resistors and pico fuses under the heat sinks.

huxley · Joined: 12 Mar 2009 Posts: 11

I'm on my way out the door, but if I take a picture of the boards and post them, could you point to what is what? My knowledge of this TV is limited.

Thanks for the reply,
Huxley

huxley · Joined: 12 Mar 2009 Posts: 11

Hey again all,

I took a picture of the back of the TV. Could someone please point out where the STK392-150's are and where I can purchase them? Also, a link on how to install them if one exists? Thanks for any help!

-Huxley

huxley · Joined: 12 Mar 2009 Posts: 11

Bump-little help anyone?

jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

The convergence IC's are on the "D" board. The D board is on the left hand side with the back off. They occupy the largest heat sink.

jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

As to where to obtain: here's two options

http://www.mcmelectronics.com/search.aspx?C=&K=STK392-150

http://www.partstore.com/Part/Sanyo/Sanyo/STK392150/New.aspx

huxley · Joined: 12 Mar 2009 Posts: 11

Hey Jts,

Thanks for the reply. Once they come in and I put them on, are there any procedures that I need to follow to get this convergence back to normal? Should the flash focus work afterwards?