Question about Toshiba 55H70 55" Rear Projection Television

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Blue Horizontal Aligning Adjustment on TP55D81


Can anyone tell me what the problem is here. When in test mode I cannot get the Blue Horizontal to Align. Is this a Blue Tube Problem, a Blue Gun Problem or what?

Thanks in advance

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  • covogolf Mar 01, 2008

    thanks, that is what I was figuring, I think I am going to give it a try, I feel confident about it. I have found the brand chips. I really don't have much to lose, just would like to give it a try.



    Thanks for your input.

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The output IC in the blue convergence section is bad or there is a loose connection in that area .If it is the IC's they are STK392-020. Make sure they are if your going to do this yourself. You would need to check the resistors and fuses that might protect this section . If you take it to a shop avg. price would be 250.00 to $300.00 . More maybe if they come to your house . Do not use gerenic's as they do not hold up as long. Good luck

Posted on Feb 29, 2008

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1 Answer

How to fix the convergence on a toshiba TP55D81 tv using the remote control


The convergence is adjusted with the remote by entering a tech menu and adjusting there====if convergence is really bad adjustments are not going to fix it.

The set should have in customer menu a limited convergence adjustment with up to nine points where you can adjust---if it will not adjust there in some way----convergence circuit needs repair.

Mar 16, 2012 | Toshiba TP55F80/81 55" Rear Projection...

1 Answer

Red/Orange horizontal lines


it could be that the tv convergence circuit is going bad. One shure way of finding out is to go to the tv feature menu(picture,audio etc.) and select the customer convergence setting, you should get a cross hair pattern(cross in middle of screen). that cross should be white and by aligning the red or blue colors they should move left, right, up or down

Jul 27, 2009 | Akai PT5492S 54" Rear Projection...

1 Answer

I replaced the convergence IC, now the picture is rolling.


That may be a simple adjustment; there are two synchronization signals embedded in the received signal, one for the vertical 'lock,' the other for horizontal. Your vertical lock has changed for whatever reason and any competent technician should be able to locate make the adjustment.
Without service literature available for the set, it might be tough to find for anyone untrained and I can't tell you where it is located on your set.

Jul 12, 2009 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

Red and Blue convergence


you may need a new convergence board only a tv shop can tell you for sure

Nov 03, 2008 | Projection Televisions

3 Answers

No color adjustment


51f500_51_in_rear_projection_hdtv_190581.jpg

Problem with Hitachi 51F500 51 in. Rear Projection HDTV-Ready Television
i want to learn how to do convergence on my tv its a hitachi rear projection i have problums with colors not aligning,could you lead me in the right direction ps: i don't have the remote so i

can't magic focus

Posted by avatar13.jpgejaparks on Mar 03, 2011

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Solutions (1)

Your convergence has failed and needs to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed. You can call in a repair shop or you can get the parts and instructions from www.TvRepairKits.com and do the repair yourself. Its a fairly easy DIY fix.
Here is an example photo.... louis66_0.jpg

Jul 04, 2008 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Tri coloured ghosting


maybe...it might need service mode aligning be a tech

Jan 02, 2008 | Projection Televisions

2 Answers

Convergence problem


replace the stk-392-110 (x2) and any burnt resistors. cost 20$

Nov 19, 2007 | Panasonic PT-47WX42 47" Rear Projection...

1 Answer

Blue horizontal bows/lines


Replace convergence IC's,then check alignment.

Use OEM quality ==I use Panasonic IC's with no call-backs.

T.

Oct 13, 2007 | Samsung PCN5425R 54" Rear Projection...

1 Answer

Colors won't stay set


NOTE: Manual Convergence settings ARE LOST if the customer returns to AUTO Magic Focus mode. (More Details) this situation is normal. Bottom line: This is caused by two issues, The Centering is off of any or all CRTs. (Don't forget Red and Blue Offset values). The Horizontal Size needs to be changed by increasing H. Size by 20mm. Readjust the Horizontal Size to the NEW specifications. These are different that the original Service Manual. They have been increased by 20mm on 51", 57" and by 25mm on the 65". Before replacing DCUs, Please CHECK and confirm if any of the three color center alignments are off and readjust the Horizontal Size to the New specifications.. TO CHECK. Clear DCU data by holding down the DCAM "Service Only Switch" and then POWER. Make sure the Green is centered. Make sure the Red and Blue is offset from center with respective offset value according to the SM information. Readjust the Horizontal Size to the NEW specifications. These are different that the original Service Manual. They have been increased by 20mm on the 51" and the 57" and on the 65" it's increased by 25mm. There IS NO NEED to replace DCUs. The DCUs are not defective...All that is needed is to confirm the Centering Adjustment for the three colors and adjust the Horizontal Size to the NEW specifications. Adjust if any color is found to be out of adjustment specifications. If you don't understand this then you need live chat!

Sep 11, 2007 | Hitachi 43F300 43" Rear Projection...

1 Answer

Convergence


Replace both convergence IC's part# STK392-040. Also check for burnt/discolored resistors nearby.

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