Question about Hitachi 43F300 43" Rear Projection Television

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Convergance Green bowed top & Bottom

Replaced Stk292-500 Ics. Then It Burned the R 42 , Also no Picture or sound. Unit shuts down. Found an open Diode DX75. I need a part number for it. What else should I look For So I might save burning out the Ics Again.
Bob Branson

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Re: Convergance Green bowed top & Bottom


Posted on Jan 10, 2008

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I have a Sony kp53xbr35 rp tv, the problem is that i turn it on the lights begin to turn on. the screen turns blue to blue green then red and the tv shuts off. i can still get sound but no picture. the...

Projection sets have two very common problems outlined below.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. The TV can also shut down when the convergence starts to fail.

Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith, RCA and others.

You can get more information and a DIY convergenece repair kit with instructions from TV Repair Kits using the link at the end of this article.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture


You can see some more examples and find a fix using this link on Fixya

Nov 16, 2009 | Sony KP-53XBR45 53" Rear Projection...

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I have a Sony kp53xbr35 rp tv, shutting off

If you know that the convegance IC are bad then I would replaece them frist and see if that will fix the whole problem, it just might. Here is a sight you can go to that may help you if that does not fix it has some good info on sony not your model but could be same problem. check it out and see.

Nov 16, 2009 | Sony Projection Televisions

2 Answers

I have a JVC I'ART projection hdmi 1080 model #av-48wp74 .it is 6 yrs old and it started to get a double image [ghost]and the colors are off. i tried the auto convergance but to no avail???

If this is not resolved soon, the picture will start to bow from the top and bottom. This is a common rpoblem with CRT based projections sets and is in the convergence circuit. If you can solder, you may be able to resolve this yourself. Be aware that there are potentially dangerous high voltages present inside the set even when unplugged.

The problem can be as simple as poor solder connetions at the convergence ICs or defective ICs. In any case, these ICs are large and black and are marked STKxxx. If you can locate these, try resoldering the pins on the ICs. If that fails to resolve the probelm, replace the ICs.

Please keep us posted.


Oct 05, 2009 | JVC AV-48WP74 48" Rear Projection...

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Curved picture at top and bottom

if it is bowing from top and bottom your looking at a convergance problem if you keep using your tv soon there will be no picture at all when the board crashes... convergance board needs to be replaced... hope this helps..

Apr 11, 2009 | Samsung HCN4727W 47" Rear Projection...

1 Answer

I have a 53 in. sony projection tv,. bowed picture tubes?!?

Replace Both STK convergence ICs will have part number on them STK392-560 use same part number on your STKs. Also around ICs ck pico fuses 5/6amps they are green or yellow.

Jan 07, 2009 | RCA P56930BL 56" Rear Projection...

1 Answer

RCA model P61950

fl231 is the convergence fuse, and is soldered to the board in proximity of the convergence ICS, on RCA rear projection TVs.

fl231 has blown, TV usually does not turn on at al, if you get bowed picture, that means that the convergence ICs must be replaced.

The fuse is on the same board where you find convergence ICs, if the fuse had blown, or the pico fuses at the base of the STK convergence ics had blown, the STKs must be replaced.
There is need of purchasing the service manual to do the job.

The repair shuld be done by a technician.

This is the convergence IC, model may vary:


Dec 13, 2008 | Projection Televisions

1 Answer

Red convergance

You will need to replace both convergence ICs they are STK392-110 and you will also need four 6.8 ohm 1watt resistor. You can get replacement ICs and resistors at the following link with free installation instructions.

Sep 21, 2008 | Philips 43P8341 43" Rear Projection...

1 Answer

Phillips Magnavox 60" model ptv835

Recently had same issue and after EXTENSIVE SEARCHING found all three ICs and replaced them. TV works perfectly, also, replaced convergence ICs at same time. The one 16-pin IC for the regulation ckt. is $49.95 the other 16-pin IC is $19.95 and the 8-pin opto is about $10. This price is for a minimum qty. and must have a business for quote.

Aug 29, 2008 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Convergence issue with blue

You need to replace the convergence Ics located up front behind the speaker grille numbers STK392-110 you can get replacements at the following link and they provide free tech support and instalation instructions with pictures. heres the link.

May 06, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Hitachi 53udx10b

sounds like convergance amp ic's see links below

Jan 01, 2008 | Hitachi 53UDX10B 53" Rear Projection...

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