Question about Akai PT5598HD 55" Rear Projection HDTV-Ready Television

1 Answer

Convergence problem The TV is about 3 years old. yesterday when it come on the convergence was off, a bow line at the top and a ghost image. when i went to the convergence screen, in the menu, it seems the red is off. There is no way to align the screen. I know it has a convergence crt problem from reading online, seems to be a common issue with samsung and akai.I looked on it has two listed crt-blue and crt -green both cost $238.00.Can someone let me know a better price and or how to tell which one I need or if this is the part I need?

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  • laketrash Nov 12, 2007


    Where should I order them from I looked on and they did not list them. thank you for your help


  • laketrash Nov 13, 2007

    Thanks guys, I called around yesterday found out samsung, made the TV for AKAI, they no longer make the complete convergence board. I wanted the complete board since my soldering skills are lacking. I called and they had the board instock made by samsung for 76.34. I should have it in by friday. I will then order a couple of chips and attemp to replace them on the board I take out for a spare. The repair tech I had come by said about 3 or 4 years he sees the same problem in a lot of projection screens. I figure if we start putting back $50 a month from now for a new TV in 3 to 6 years I should be able to get good one.

  • laketrash Nov 15, 2007

    Last, the convergence board with the two STK392-040's installed on it came in yesterday 3 days total. Last night I installed the board, went to the picture menu and setup the convergence red and blue presto fixed. I tried the perfect focus without any luck first. Thank you for your help everyone.


    PS I am going to order 2 more STK392-04s and take it to the votech and have them install them for me on the old board. Then I will have a spare for 3 years from now.

  • Anonymous Nov 28, 2007

    I have the same T.V. with red ghost. It started last Saturday. I ordered two IC's(Sanyo's I couldn't find Panasonic) I'm looking for some soldering tips. I've done stuff years ago with two and three leads and used niddle nose as the heat sink. Whats the best way to desolder the old and resolder the new without heat damage to the board or IC. Where do you apply heat sink grease? The bottom of the IC body or on leads where they meet the IC body? Than

    ks for you help this is great.

  • baspas Dec 03, 2007

    I had the same problem with red ghosts. Replaced the IC's, problem solved. Thanks, Terryfic.



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Part # STK392-040 X 2 Do not use generic-they won't hold up.
I use Panasonic brand with no recalls------wholesale cost about
30.00 each. Always replace both at same time = more efficient.
After replacement, alignment may be needed = let me know.

Please rate this solution...................T.

Posted on Nov 12, 2007

  • Vista Electronics Nov 12, 2007

    Andrews Electronics or any distributor that will sell you the

    brand name you request and that they stock - Samsung,

    Panasonic or ? - Remember = no generic!

  • Vista Electronics Nov 12, 2007 = part # 1201-001225 63.00 each.......T.



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Screen has double image in red

This is a convergence problem that is either poor solder connections at the convergence ICs or defective ICs. If you can solder, you can fix this yourself. Update this if you wish to attempt the repair and I'll provide additional details and instructions.


Mar 24, 2009 | Mitsubishi VS-50501 50" Rear Projection...

1 Answer


Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

TV set after fluid change


2c07611.pngSolution #2

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from that includes replacement coolant, photos. instructions, etc.

Mar 20, 2009 | Philips 60PP9352 60" Rear Projection...

1 Answer

Watching TV and top 1/3 screen ghosted by colors

on this type of tv each gun is controled by hor.and ver. chip together. it is on the board that controls the convergence of the tv. some manufactors have recalls on problems like this. i dont know if this one does but it may. you can check with mitsub. i do know that this part is about 250.00

Jan 02, 2009 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

D52w23 convergence

These sets sold for anywhere from 990 up to 1400.00 , so i would say it is worth fixing also when you go to menu in menu go to set up then look to see if convergence is on menu if it is not , then you have a open fuse located next to flyback transfomer, fuse FL231 . you can order rebuilt Deflection board for 179.00 plus shipping 50.00 dud fee when old board is returned 129.00 call union electronics
1-800-648-6657 First let me know if convergence is on menu, if it is listed on menu in setup then try this turn tv off , then press and hold vol- and ch - at the same time some times tv will reset convergence automaticly

Oct 13, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

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RCA 52

ok go into setup menu.... go to convergence.. try to adjust convergence .. does the crosshair move up and down side to side... if not then you might hqve q poblem with convergence power supply if they move then u might have s setup issue

Mar 25, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Sudden discoloration, ghosting, bowed horizontal lines in top and bottom of picture

The most likely cause is shorted convergence chips and possibly a few pico fuses.

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. 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,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

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

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*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 herebb0cf99.png

Nov 10, 2007 | Samsung PCL6215R 62" Rear Projection...

2 Answers

Sudden discoloration, ghosting, bowed horizontal lines in top and bottom of picture

The convergence ICs probably have a cracked solder joint on the foil side of the circuit board. Re-flowing the the solder would help. I will always replace the convergence ICs when doing this job. The labor remains the same and you will have to pay a few extra bucks for the parts. To fix this yourself, you will need to be able to identify the two convergence ICs, have a basic knowledge of electronics and be able to use a soldering iron. You will also have to do an alignment through the service menu.

Apr 01, 2007 | Samsung HC-P4752W 47" Rear Projection...

1 Answer

Bowing and ghosting

replace the pcb convergence board,, It costs $96 and takes 10 minutes to replace you will have to manually line up your convergence afterward as the settings go to factory default. Everyone that owns this set has or will have to replace this part within 3 years
Or Vance baldwin online
Part number bp94-00155a

Dec 30, 2006 | Samsung HCN4226W 42" Rear Projection...

1 Answer


Your set has what is know as "convergence problem" because of the bowed lines and ghost in different colors,is really not an easy solution,the set should have 3 amplifiers(one for each color)and they need to be replaced with an exact replacement,sometimes just by replacing them the aligment should be close but soemtimes you nned to get into the service menu to do some adjustments,the amps(IC's) are mounted on heat sinks and all 3 have the same part number on its face,they normally read STK--- ---,every set uses different amps,If you are familiar with tv service you have now a place to start working but if you are not too familiar be safe and call for help from a servicer.Let Us know if you need more information.

Oct 31, 2006 | Akai PT5598HD 55" Rear Projection...

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