Toshiba 42H82 42" Rear Projection HDTV-Ready Television Logo
Anonymous
Anonymous Posted on Sep 19, 2009
Answered

The convergence is off. When I try to use touch

The picture has 3 separate colors that doesn't line up, red, green & blue. The convergence is off. When I try to use touch focus, the red lines are extremely convexed. The touch focus fails and says error. When I try to manually adjust convergence, I can't get the crosses to come close. What's my problem? Is it worth repairing? Thanks

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  • Anonymous Sep 19, 2009

    I apologize I thought I had replied. It is the 42H82 Toshiba rear projection. From what I'm reading it appears to be the STK-392-110 convergence chips. from what others are saying the symptoms are the same. The colors are right above one another. When I try to adjust convergence manually, I can't get either red or blue to move vertically, they will move horizontally. Also the picture looks like it has 3 levels. The bottom of the screen has a blue bow in it. Thanks

  • Anonymous Sep 19, 2009

    I apologize I thought I had replied. It is the 42H82 Toshiba rear projection. From what I'm reading it appears to be the STK-392-110 convergence chips. from what others are saying the symptoms are the same. The colors are right above one another. When I try to adjust convergence manually, I can't get either red or blue to move vertically, they will move horizontally. Also the picture looks like it has 3 levels. The bottom of the screen has a blue bow in it. Thanks
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  • Anonymous Sep 19, 2009

    Please forgive me, I just replied to the email instead of replying to the clarification request. First I want to thank you for your help & patience. I'm fairly experienced with soldering (not that I think I've arrived). But I have limited experience with soldering on circuit boards, I have done it though. I have a Fluke digital VOM & a Simpson 260 analog & I use primarily a Triplett analog because it has a 100K scale.

  • Anonymous Sep 21, 2009

    I really appreciate your reply. The last one I opened was at 1 AM and I had to work the next day. Once I got to work I found out I will be working 12 or 13 days straight. So I'll be trying this again as soon as I get time to remove the back of the TV. thanks again

  • Anonymous Oct 14, 2009

    I'm back. This is the 1st day I've the time to check the directions of your last post. I have located the two STK-392-110 CHIPS. I've checked three resistors that look identical located directly beneath the heat sink. One of those I think is bad. The one labelled R 7711 on the circuit board reads .609 with the Fluke. The other two reads 2.1 and are marked R 7716 & R 7721. Ther are 3 green resistors (I guess) located closer to the back of the tv and are marked R 7715, R 7720 & R 7710. As far as the pico fuses are concerned, I'll need some help in locating them. Thanks

  • Anonymous Oct 14, 2009

    Thanks, you are right they look nothing like fuses. Posting their rating helped me to locate them. The 1st I saw was 125v 5amp. They tested good, and as far as I can tell all the resistors test OK also.

  • Anonymous Oct 14, 2009

    Thanks so much, once I get them replaced I'll get back with you. One more question. I have a 35 watt & a 100 watt soldering iron. I know the 100 is too hot for the board, should I get a smaller iron than the 35?

  • Anonymous May 11, 2010

    This is not the most easy model to do this repair in--Yes--you will need two STK-392-110 CHIPS and you may also find one or more of the resistors around them are bad--they may look good and you will need a meter to check them--also this set uses two pico fuses to protect the power supply in case the chips short--they are usually on the power board and do not look like fuses---I am a Tech--how much skill with soldering and a meter to check things do you have?

  • Anonymous May 11, 2010

    It may be worth fixing if you are able to do it yourself---confirm model and reply to this post and i will tell you what is involved REGARDS, SD TECH

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  • Toshiba Master 14,553 Answers
  • Posted on Sep 19, 2009
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Ok, we go to solution of your problem===The pico fuses are green and on the main power board--have you removed the back and looked inside--most of these sets have the two STK-392-110 on the main board to the right-they are usually on the left edge of this board on two very large metal heat sinks--chips are about 2 1/2 inch wide X 1 1/2 inch tall--is this how your set looks inside? they will have the number printed on the black face of each chip in white--The fluke meter will allow you to check all the grey protect resistors--most are 1.8 ohm and the pico fuses will be near the edge of the board to the left----All I expect from you for help is a vote here--if you remove the back do you see the chips?

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  • 1 more comment 
  • Anonymous Oct 14, 2009

    Most of the resistors that go bad look exactly like R7716--------they are 1.8 ohm(pairs are connected so they may read different---you are looking for one with no reading across it------the pico fuses are 5 amp and location numbers are F850 and F851. (USUALLY ON THE FAR LEFT BOARD NEAR THE FRONT)

    Note the color bands on R7716---check all the others around that have the same bands---most of these sets the resistors will look fine but be open---

    SD TECH

  • Anonymous Oct 14, 2009

    If the fuses and resistors are all good you need to replace both chips and see what you have---if it works let me know---YOU can adjust convergence in the customer menu but I can give you instructions here for adjusting in the TECH menu----adjusts all over the screen--not just in 8 or 10 places.

    WHEN YOU REPLACE THE CHIPS DO NOT FORGET TO PUT HEAT SINK COMPOUND ON BOTH THE NEW ONES OR THEY WILL NOT LAST VERY LONG.

    Let me know what happens.

    Regards, SD TECH

  • Anonymous Oct 14, 2009

    yes, get some liquid solder flux and apply to pins on each chip--also used a desoldering braid--not a suction tool---easy to damage board that way---the flux will make it easier to remove the lead free solder this set uses----do not force the iron or you can damage foil paths!

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

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

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Red, Green convergence lines are wavy
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Sep 16, 2009 • Akai PT4298HD Rear Projection Television
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According to the manual:
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2) Select "Screen"
3) Select Adjust Projection TV (obviously only if a projection TV).
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Jun 08, 2009 • Proscan PS50700 50" Rear Projection...
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Convergence problem
This is out of the service manual

don't forget to write the setting to rom by hitting the pip button twice

Good luck and don't hesitate to ask questions






2.12.5 Convergence point adjustment
Adjustment preparation
(1) Select color to adjust.
“STATUS” - Green
“0” - Red
“ANT” - Blue
(2) Use 4, 6, 2, and 5 to move the cursor position
(dotted lines).
(3) Use thumb stick to move the convergence point.
(4) Three adjustment modes are available:
1. (3x3) Press “STATUS” 5 times (only works
when DCU is in uncorrected state)
2. (7x5) Press “0” 5 times
3. (13x9) Press “ANT” 5 times
For touch-up, only the (13x9) mode is necessary.
This will adjust every cross-hatch intersection point
on the screen.
For complete adjustment, start with (3x3) mode. This
will adjust center point and eight edge points only,
but will greatly reduce adjustment time. Then use
(7x5) mode, and finally (13x9) mode to finish
convergence.
If “S” distortion appears between cross-hatch lines
repeat (7x5) mode to change calculation process
while adjusting to remove distortion, then return to
(13x9) mode to finish touch-up convergence.
Adjustment procedure
(1) Receive any NTSC signal.
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(3) Continue adjustment at next closest position.
(4) Adjust center area first, ending with edge sections.
(5) Press INFO button to perform calculation operation.
This process will take about 2 seconds and no
picture will be seen at this time.
(6) After interpolation, check convergence again and
repeat (1)-(5) if necessary.
(7) When convergence is acceptable, press PIP MODE
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displayed to alarm system that ROM will be
overwritten with new data. Press the PIP MODE
button again to write displayed data to ROM.
(8) DATA WRITE TO ROM will take approximately 4
seconds and no picture will be displayed.
(9) Green dots will be displayed when operation is
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(10) Press MUTE to return to convergence pattern, then
confirm again convergence is acceptable.
(11) Press PIP MODE (ROM WRITE) mode, then press
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(12) Input any 1080I signal.
(13)Press EXIT key 5 times to exit video mode.
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DO NOT write cleared RAM data into ROM or a
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Screen lookes like colores separating
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RCA ~ITC222 D52W20~Convergence bad~~~ITC222~Replace leaky DL032 on
deflection board~~~~~~

RCA~D52W20Y ATC221~Convergence goes out/bowed after on for a few
minutes~~~ATC221~Problem may be on the deflection board. Was unable to
pinpoint where in this case.~~~~~~

RCA~D52W20BYX1 ITC222~Convergence way off after replacing small signal
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defective..transfer the new EEPROM back over.~Remember on these
sets*when replacing the SSB* if there is a small P on corner of
screen*hold volume on remote for 8 seconds after it reaches minimum.~~~~~

RCA~D52W20BYX1 ITC222~Can not align blue convergence* bottom really
bowed* possibly either color after replacing SSB.(Or no auto
convergence.~(Service menu: turn power off for 30 seconds* press vol dn
and ch dn* simultaneously for 8 seconds* set turns on with service menu
options)~~ITC222~In service menu* select convergence. If sensor
calibration was performed when convergence was too far off* it will not
alighn.~Get crosshatch with straight lines* perform sensor calibration*
then attempt convergence alignment again. Be sure to store settings*
then do sensor calibration again.~You must get a green flash of the
screen after sensor cal and a check in the box. RED flash indicated
convergence settings are too far off~~~~

RCA~D52W20BYX1 ITC222~no convergence correction~~~ITC222~LP650
(259271) DP670 (259246) & RP632 (259564) 4.7 3W on convergence power
supply board~~~~~~
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Oct 28, 2008 • RCA R52WM24 52" HDTV Projection Television
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Screen lookes like colores separating
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Sep 10, 2008 • RCA HD52W56 52" Rear Projection HDTV
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Convergence and picture problem.
convergence ic's
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
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Jan 07, 2008 • Sony KP-57WV600 57" Rear Projection...
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Toshiba 57h82
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