Question about Panasonic PT-51HX41 51" Rear Projection Television

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Service Manual PT-51HX41E Needed?

Is locating the STK392-110 IC difficult? I don't have the service manual and haven't yet ventured in opening the back of the TV. I need to replace them due to the covergence issue I have. Any one provide an idea where they are or have the service manual in electronic format? email [email protected] if you do.. thanks

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Robert Johnson

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If you haven't the technical ability to repair this set I suggest to get a tech to replace the stk392-110 convergance amp ic's. these ic's are very noticable they have the largest heat sinks in all the sets ic's. but the problem may not be the ic's alone, there may be several resistors open or open pico fuses. So if you are not technicaly inclined donot attempt this repair. it's not just the replacement of the ic's that need be done but geometry and final convergance in the service menu. please leave this to the pros.

Posted on Sep 22, 2007


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1 Answer

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1 Answer

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Don, who says you need the vertical ic replaced? Although you are to the point as to where the problem is. I think the ic is ok. The ic is a 7 or maybe a 9 pin component. In some cases it could be 13 pins. If you are sure where the location is, it is mounted to a large heat sink. I am not real sure of mitsubishi location scheme . If you can find it, most of the time pins 3 and 4 will be shorted. Measure to be sure. I think it is good. Look real close at the pins. They may have rings around them..resolder these making sure not to use to much solder. They should make contacts between pins. Now examine the four or maybe 5 capacitors with corresponding numbers. replace them with exact values. Use High Temp 105 degree ones. If you decide to replace the vertical ic, removed the clip around it. It will be the LA78--- series, cross it with an NTE replacement. see your electronic store for parts.

Jul 07, 2009 | Mitsubishi Televison & Video

1 Answer

Mdl kp53v85 red is out of alignment and bowed

Your convergence ICs are bad. They are about 20 pin chips located on the D board. They are on the largest heatsinks on the board. Check the resistors and fuses underneath or next to the heatsinks with an ohm meter to make sure all are good as they can fail with the ICs. This is a difficult repair but can be handled by a moderately skilled electronics tech. After all bad parts are replaced, run the magic focus to hopefully re-align the colors. If you have to go into service mode to re-align convergence data, the complexity of the repair just went up another notch. On a sony, service mode is tricky and a service manual would be highly recommended. Your tv uses two stk392-150 ICs (ic 1502 and ic 1505)

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Hello, below in my post is a link to the Manual library. there are detailed instructions on how to adjust the color. it takes time and some steps are difficult but using two people you should have no problem just print them out and go step by step... also I suggest doing it at night with low lights or off, and let the TV warm up for 20 mins.

Good luck, below is my general post with lots of info


Actually I have this TV and you need 2 Convergence IC's STK392-120's (120's and 150's will work) of course order 2 of the same type I'm using replacement 150's they allow for a little higher heat and were cheaper ALSO you need to replace the 12 resistors with 6.8 ohm metal film resistors, make sure they are metal film! don’t skimp out here I did and then they blew and fried my IC's and I had to replace everything again!

Great reference link that I posted pictures on, check out page 3

Where I got all my parts that worked:
Suburban Electronics

Manual Library you should find all you need here:

What you need:
(2) STK392-120 OR STK392-150 IC chips
(12) 6.8 Ohm Metal Film resistors
set of star screw drivers
15 watt pencil solder pencil, DO NOT use a high watt iron you will fry the surface mounted item.
good leaded solder, and flux

BTW if you don’t plan on trying this and are going to throw out the TV, I still need a IC convergence board for a 51MP392H/17 TV I'm fixing, I'm willing to pay S/H and buy your IC board that’s not been tampered with. [email protected]

Nov 16, 2008 | Philips Magnavox 51MP392H Rear Projection...

2 Answers

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1 Answer

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Jul 31, 2007 | Sony KV-35S42 35" TV

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