CRT based RPTV Convergence Repairs - Page 11 - Home Theater Forum and Systems - HomeTheaterShack.com

 
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post #101 of 305 Old 03-20-08, 07:05 PM Thread Starter
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Re: CRT based RPTV Convergence Repairs

Read the posts at the start of the thread.




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post #102 of 305 Old 03-20-08, 09:27 PM
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Re: CRT based RPTV Convergence Repairs

I've read the thread but I really don't know how to read the schematic to determine which resistors go with the STK's or at least how many there are . One of your post says the kit has more resistors than I'll need so that kinda of eliminates me just changing out what comes with the kit....

Last edited by ibokie; 03-20-08 at 09:40 PM.
post #103 of 305 Old 03-20-08, 09:42 PM Thread Starter
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Re: CRT based RPTV Convergence Repairs

On your set the resistors are the large ones standing up off the board between the ICs and the red, green, and blue convergence connectors, to the left of the ICs looking from the back. If you go the right kit for your set, just change them all.




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post #104 of 305 Old 03-20-08, 10:08 PM
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Re: CRT based RPTV Convergence Repairs

Thanks guy.Your posts have been very informative. They are basically what convinced me to try this myself. I don't mind a tech earning a living but when I get charged 400 bucks to do a job that only requires less than 40 bucks or so for parts and doesn't last longer than 14 months, not to mention that I had to deliver and pickup the TV , that kinda rubs me wrong the wrong way.This ain't brain surgery.It's fixin a TV for cryin out loud !
post #105 of 305 Old 03-20-08, 10:38 PM Thread Starter
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Re: CRT based RPTV Convergence Repairs

This happens to be a very routine repair. Most repairs are not so simple and service shops lose money on those, so they make it up on routine repairs. $400 is still more than I charge, even with a service call to the home to repair the set. This is not a repair that should require the set to go to the shop. It is also not a repair that should have to be repeated in 14 months. It is likely that the tech either used inferior parts or missed something. If it is the latter, it is likely that you will miss it as well.




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post #106 of 305 Old 03-20-08, 11:31 PM
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Re: CRT based RPTV Convergence Repairs

Miss it I might , but I'll feel a lot better about it knowing that I tried . I'm out $37 for the parts ,$9.95 shipping and $15 for the schematic. Not to mention the satisfaction of knowing that I tackled something new. Thanks for sharing your information on the web like this. Knowledge is wealth and a dumb ol' Okie like me needs all the help I can get ! The parts should be here in 3-6 days , I'll let you know how it turns out.
post #107 of 305 Old 03-21-08, 10:54 AM
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Re: CRT based RPTV Convergence Repairs

Icaillo,

First off thank you so much for all the detailed information on repairing convergence problems with replacing IC's and resistors. I have a Hitachi 57F500A, rear projection TV with the infamous convergence problem. Bought the SANYO IC # STK-394-160’s kit with the resistors. I removed the old STK392-150 and replaced with the new 160’s. Checked and metered the resistors on the board and all seemed fine. Installed everything back together and I get no video and no sound.

The original problem was a convergence issue but I had video and audio. After replacing the IC’s, the TV turns on but no audio and no video. What did I do wrong? Do I need to replace all the resistors? The soldering on all of them looked fine. I recently did this same repair on a 55” Toshiba and it worked like a charm.

Please help.
post #108 of 305 Old 03-21-08, 01:15 PM Thread Starter
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Re: CRT based RPTV Convergence Repairs

You likely pulled a connector loose. Check the boards carefully.




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post #109 of 305 Old 03-21-08, 01:32 PM
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Re: CRT based RPTV Convergence Repairs

Please excuse my ignorance...connector?

Thanks for the quick response.
post #110 of 305 Old 03-21-08, 02:05 PM Thread Starter
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Re: CRT based RPTV Convergence Repairs

Connectors - those things on the end of a wire or bundle of wires that plug in to the sockets on the circuit board.




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convergence , dcam , resistors , service menu , shutdown , stk , stk392-110 , stk392-120 , stk392-570 , stk394-160

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