Question about Panasonic PT-51HX41 51" Rear Projection Television

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Convergence adjustments I have question concerning green convergence adjustments. Is it necessary to have perfect squares with the green before overlapping red and blue?? I have replaced both STK both convergence IC's and green does not adjust to good squares;futhermore, I plan to replace all 2watt resistors related to these IC's.

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Re: Convergence adjustments

Did you use the proper STK IC's Do the replacement IC's have SANYO on the face of them? If they do not, this could be your problem. You must use the IC that the manufacturer recommends. All IC's are not alike. Go to MCM electronics and enter your IC number and they sell original SANYO IC's. Good Luck

Posted on Jul 18, 2007

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Convergence adjustment aligns red and blue picture tubes to align with fixed green tube. Green image appears to skewed (possibly out of focus) in one direction making it impossible to get red and blue...

Ur tv convergence are dead.U know how to solders?Must replaced the 2 STK convergence ICS,some or all it resistors.Tries Websites Tv repair, to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.

Apr 04, 2010 | Mitsubishi WS-65809 65" Rear Projection...

1 Answer

"Perfect Focus" problem on Samsung HCN4727W

You have a bad sensor, a bad digital convergence board, or the new board is not working correctly. I would start by swaping out the convergence board or exchange it for another one. Good Luck

Nov 08, 2007 | Projection Televisions

1 Answer

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
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.
(2) Start adjustment at the center of the screen.
(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
to write data to ROM memory. ROM WRITE? is
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
(10) Press MUTE to return to convergence pattern, then
confirm again convergence is acceptable.
(11) Press PIP MODE (ROM WRITE) mode, then press
PIP CH to initialize sensor data positions.
Adjustment procedure
(12) Input any 1080I signal.
(13)Press EXIT key 5 times to exit video mode.
(14) Select an input with 1080i signal.
(15)Access menu and select ASPECT 5 mode.
(16)Press the SERVICE SW. ONLY button to enter to
DCU crosshatch signal.
(17)Repeat steps 2~11 above.
Notes: (1) Display only green for easier adjustment and
match to jig screen. Press “MENU”, THEN
(2) Perform interpolation and data write to ROM
after green adjustment. Once green has been
confirmed to match jig screen, the jig screen can
be removed. Do not readjust the green color
after jig screen has been removed. This is now
your reference color.
(3) Display green and red only and match red to
(4) Display all colors and match blue to green and
red. Touch-up red color if necessary.
(5) Existing DATA in ROM can be read by pressing
the SWAP button 2 times. This data can be used
after replacing a component (CRT, DY, etc.)
Where complete convergence adjustment is not
necessary, be careful not to overwrite this data.
DO NOT write cleared RAM data into ROM or a
complete convergence adjustment will be
necessary. Remember to try MAGIC FOCUS
before starting convergence adjustment to
minimize adjustment time.

Feb 01, 2009 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

RCA P52930BL Setting Green Convergence

check conector j19105 to be seated properly.
if this dosent fix it
look in the uper right hand side of light box in the back of the set
you will see the convergence Power supply, remove and replace it.
save your self time and just replace the board.

Jan 12, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

3 Answers

No color adjustment


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 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

Hitachi 53uwx10b Convergence

The grid (called an overlay) is put in place to fine-tune one of the colors, usually green. Once one color is adjusted perfectly, the other 2 colors are adjusted to match the first color. For example, if the convergence data is completely erased, the tech will set up the overlay and align the green using to the overlay, and then align the red to the green and then the blue to the green. If the alignment is being done after replacing the convergence IC's because one or 2 colors are slightly off in the corners, the green is usually very close to perfect and the use of the overlay is not absolutely necessary. It is pretty easy to align one color using the outer edges of the screen itself. If you do need the overlay it can be purchased from any Hitachi parts distributor such as Herman Panson, Fox or Union Electronics.

Mar 31, 2008 | Projection Televisions

2 Answers

Convergence issue, green line grid out of square

most likely you have bad connections on green stk solder the connections or replace the stk check all fuses too

Nov 15, 2007 | Hitachi 57TWX20B 57" Rear Projection...

1 Answer


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

Aug 23, 2007 | Samsung HCL4715W 47" Rear Projection...

2 Answers


Im trying to install that same board on the same tv how did you do it?

Apr 06, 2007 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Green out of convergence

The green convergence IC is defective. this is not a job for the consumer to do as it requires the experience of soldering and unsoldering and the know how and the safty nissues concerning the HI voltage inside these sets. Please consult a pro to assit you in this matter. Good Luck

Jul 01, 2006 | Toshiba 55H70 55" Rear Projection...

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