Question about Toshiba TP55H60 55" Rear Projection Television
I just picked up a 55H60 for free from a relative for my basement. Unfortunately the red is way off in comparison to the blue and green CRTs (mainly on the left side). I went through the convergence process in the user menu but can't get the red to adjust far enough. I was considering going into the service menu to see if I could pull it in from there. I don't have service menu experience with a Toshiba but have made many adjustments on my Sony RPTV. Is it possible to fix the red alignment via the service menu?
Posted by Michael Maylock on
If the convergence adjustment is not moving the beam chances are the convergence IC(s) are defective. If you know how to solder and understand TV safety you may be able to fix it. With power disconnected remove the back. You should see two large heat sinks with large ICs (3 by 6 inches) with about 30 leads going through the circuit board. Numbers on the ICs should usually be something like STKxxx-xxx or some variation with x being a number. These ICs control the position of the three beams. If they go bad you can't adjust one or more beams. Replace them both as you don't want to get in there again in 3 months. Cost is not that much. http://www.tritronicsinc.com or http://www.partstore.com should have them at a reasonable price. Before replaceing the ICs look at the circuit board closly for cracked solder joints. Resoldering any bad joints might just solve your problems and avoid replacing the ICs. Good luck and remember safety.
Posted on Jul 12, 2006
I would concur with the other solutions. My green convergence went way out and could not be adjusted in the service menu. I replaced the STK392-110 ICs ($5.99 apiece from www.electronix.com) and it fixed the problem. I have a follow up question though: some other forums have said that I should have replaced all of the resistors connected to the ICs or my solution will be short lived. Others have said that I might have to replace the resistors if they had been burned by the failed chip. Should I open it back up and replace the resistors as well? You can read about my fix here: http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html#comments
Posted on Nov 28, 2006
Maybe it's just me.. am I doing something wrong? How come discussions like this are around topics not related to the heading???? This is clearly a 'troubleshooting' topic under SONY GRAND WEGA KDF-60WF655!
Posted on Nov 12, 2006
SOURCE: Toshiba 42H82 convergence problem
Replace STK convergence IC's w/OEM or better parts.Senior tech soldering ability needed. Ex==Steel jumper wires feeding b+ to conv. IC's need resolder to prevent call-back.Also, best re-alignment done in service mode==consult service literature.
Posted on Sep 29, 2007
SOURCE: 50H82 red wavy convergence (stks didn't fix)
If the tin can module you are referring to is the hyper module, it is common to replace all 11 caps because the factory caps ****. Check for bridged solder connections at STK's search the forum at electromaniacs for 50h81 :)
Posted on Mar 02, 2010
SOURCE: Toshiba tp50h60 convergence
Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.
The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded overs. To get fixed either call in a local TV repair company or goto sites such as Tv Repair Kits to get a repair kit with instructions. Here is there link.
They have put together complete kits for most models that include the parts, step by step photo instructions, repair assistance, etc.
Posted on Jun 14, 2010
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Thanks Hardrocko. Before I got your reply I wnet into the service menu and adjusted the red in pretty well. After about 5 minutes the red then popped way out from where I had adjusted it. The horizontal linearity bowed out big time. That leads me to believe that it's component related. Does it still sound like the convergence IC is bad?
I finally found thhe 2 ICs you were talking about. I must have laid there on the ground about 6 different times looking for the ICs. I was looking for IC chips not those honkin' things. Doh!! From behind the set I had to use the reflection of the shield on the back of the digital convergence board to see the ICs. STK396-110 They run about $17 a piece at partstore.com. Do I have to pull the entire PCB out to get them out or can I cheat and access the soldering from beneath the set by removing the vent screen? I'm comfortable with soldering and safety but without a service manual I may not remember all the connections on the board once removed. Also, the plastic parts within the chassis are extremely brittle and I'm sure a standff or two may break.
If I decide to go with a pro, what's your guess-timate on the labor for the repair?
I made a mistake on my previous post. The part number is actually STK392-110T. Can't edit a post, bugger!!
I have a Panasonic HDTV and there's a blue shadow. I tried to align with convergence but blue goes so much and doesn't converge to the "plus" signs. I opened up the TV and unscrewed the (green) concave lens and some fluid came out, closed up immediately but when I turned the TV, I see green blur. Is there any way to ad more (green) fluid back in AND converge the blue?
Micmay, I have the exact problem with the red on my TV. Did you replace the convergence ICs and did it fix the problem?
PT47wx42 Panasonic just had both convergence IC chips replaces as well at the resistors replaces, can not get red to converge. Top of tv picture is bowed!
i have the same problem the red shows offset to everything is there a special part i need?