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Panasonic PT53WX53 geometry off

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Ron.M
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Feb 2, 2011, 2:09 AM

Post #26 of 66 (5437 views)
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Re: [mjbxx] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

mjbxx;.....

Let's not get too deep in this.....

Quote

BTW is turning the deflection coil the same as turning the deflection yoke?

Yes.....

Quote

How exactly do you adjust for horizontal and vertical tilt as per instructions?

Cover the lens (Use newspaper or a magazine etc) of the 2 colors you are NOT adjusting....
That way you'll have only the one color to adjust....
After you do one color move a cover over to the one you just completed & adjust the one where the cover came from....
Once more & you're done...

In your pix below , CAREFULLY loosen the clamp as shown;=>....
Use CARE & hold on to the yoke so it doesnt slide down the CRT & damage the module at the bottom...

Then gently turn the yoke one direction or the other to level the pix....
Use care to not disturb the centering (magnets) rings....
Once you have the pix level tighten the clamp....
Use care & do NOT overtighten the clamp as you CAN break the neck of the CRT...
Then you'll have a 53" doorstop.... Wink

...

A more conventional yoke here;=>....

This is from a Philips projection TV & shows the centering tabs....
You may have a similar style on your TV....
Do NOT mess with ANYTHING else OR you may have a problem that may be difficult or impossible to correct.....

The reason I show this is because some projection TVs have a 2 part yoke...
The dotted area in your pix could be what we call a SVM coil & is seperate part that detaches from the front part , ie the yoke...
Be observent....

In step 6 do this FIRST;=>..

Quote

Adjust also for horizontal and vertical tilt.

Then do NOT do this yet;=>...

Quote

Adjust centering magnets until the green pattern is equal on left and right.

Will explain proceedure later...
Then level the other colors...
After you do all 3 , your convergence WILL be out...
Do NOT adjust the convergence....
Post back with a pix & I'll show you a simple way to correct that....OK....

It probably would be a good idea to take a pix of your yoke assembly & post it so I can be sure we're doing the right thing...
Sound good ???

Later...Ron.M.... Cool

...
Veteran & Retired TV technician

mjbxx
New User

Feb 2, 2011, 7:11 PM

Post #27 of 66 (5427 views)
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Re: [Ron.M] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

Ron.M

Here is the yoke set up and it looks to be similar to the Phillips. I am sure you see the adhesive strip that goes over the yoke, centering magnets, deflection screw, and neck. It looks as though I should remove the adhesive from the deflection screw downward. Leaving the adhesive on the yoke and centering magnets. This would allow for yoke adjustment without disturbing the centering magnets.

"Cover the lens (Use newspaper or a magazine etc) of the 2 colors you are NOT adjusting....
That way you'll have only the one color to adjust....
After you do one color move a cover over to the one you just completed & adjust the one where the cover came from....
Once more & you're done..."

I should not have to cover any lenses as per instructions in the service manual.
Set VIDEO �C_OFF� DAC from 00 to 01 to project only green.
Set VIDEO �C_OFF� DAC from 01 to 03 to project only blue.
Set VIDEO �C_OFF� DAC from 01 to 02 to project only red.

I am wondering if I should do the Horizontal Phase Adjustment, on pages 17.1 and 17.2 which adjusts the green only in both NTSC and 1080i before I go about adjusting the yokes in the 17.3 Centering magnets adjustment.

17.1 NTSC Horizontal phase adjustment (H POS)
TOP PREVIOUS NEXT
This adjustment is intended to correct the horizontal position of the picture
NOTE:
1080i, 480p, 480i pattern can be obtained from Panasonic�s TU-DST51 set-top box DTV decoder.

Apply a NTSC pattern that lets adjust the image to correct vertical size (see above note).
Set VIDEO �C_OFF� DAC from 00 to 01 (to project only green).
Set DAC MUTE from 00 to 01 (disabling digital convergence).
Turn green deflection yoke until line is perfectly horizontal.
Adjust �H POS� DAC data so that pattern is in the center of screen
Enable digital convergence by changing DAC MUTE from 01 to 00.
Set VIDEO �C_OFF� DAC from 01 to 00

17.2 HD 1080i Horizontal phase adjustment (H POS)
TOP PREVIOUS NEXT
This adjustment is intended to correct the horizontal position of the picture for HD 1080i mode.
NOTE:
1080i, 480p, 480i pattern can be obtained from Panasonic�s TU-DST51 set-top box DTV decoder.

Apply a HD 1080i pattern (see above note).
Repeat NTSC horizontal phase adjustment from step 2

It appears that the 17.3 Centering magnets adjustment is done only for NTSC and does not require it be done in 1080i. Am I right here?

You mentioned earlier you have lost parts of the service manual. Here is the link, https://www.opendrive.com/..._account/account.php, for recovering it.

Ron.M
Veteran

Feb 2, 2011, 8:13 PM

Post #28 of 66 (5422 views)
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Re: [mjbxx] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

mjbxx;....

NOt a Philips type yoke....
The yoke you have is in 2 parts....
The 1st part is the SVM section I told you about earlier
& is below the red circle in the pix below....
The 2nd part is the actual yoke itself....
This is the part above the red circle in the pix below....
The 2 parts are interlocked together by what appears to be a plastic tab between them inside the red circle.......
You have 2 screws to loosen up to adjust the yoke...
See green arrows...

IF you leave the adhesive ON the assembly & JUST loosen the 2 screws , you should be able to turn the entire assembly & level the pix WITHOUT disturbing the centering rings...

Remember this;=>...

Quote

Let's not get too deep in this.....

Quote

I should not have to cover any lenses as per instructions in the service manual.
Set VIDEO �C_OFF� DAC from 00 to 01 to project only green.
Set VIDEO �C_OFF� DAC from 01 to 03 to project only blue.
Set VIDEO �C_OFF� DAC from 01 to 02 to project only red.

I am concerned about your tecnical ability...
Moving a cover from one lens to another is by far the SAFEST way to do this....
I am leary of anybody who lacks TV experience being in the Factory Menu , too easy to mess it up....
NO OFFENSE meant.... Sly

....

Quote

I am wondering if I should do the Horizontal Phase Adjustment, on pages 17.1 and 17.2 which adjusts the green only in both NTSC and 1080i before I go about adjusting the yokes in the 17.3 Centering magnets adjustment.

LISTEN UP!!!!...
You can do this the easy way as I suggested OR the hard way & mess it up....
Your Call....
NO reason to dick around with any adjustments other than the one I suggested....

Have fun..... Sly

.....

Later...Ron.M.... Cool

....
Veteran & Retired TV technician

mjbxx
New User

Feb 2, 2011, 8:38 PM

Post #29 of 66 (5418 views)
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Re: [Ron.M] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

Ron.M

"LISTEN UP!!!!...
You can do this the easy way as I suggested OR the hard way & mess it up....
Your Call....
NO reason to dick around with any adjustments other than the one I suggested...."

I will go with the easy way and stay out of the service manual. Just so I am clear. I should leave the adhesive on and loosen both deflection coil screws. Start off adjusting the green yoke first while covering the red and blue optical lenses. Then use the same procedure for red then blue. Correct?

What should I expect to see on the screen when I cover red and blue lenses and adjust the green yoke. Should I put up the X pattern strings you suggested in the previous thread. I do have the Avia calibrating disc if that would be helpful.

Ron.M
Veteran

Feb 2, 2011, 8:59 PM

Post #30 of 66 (5415 views)
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Re: [mjbxx] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

mjbxx;....

Quote

I will go with the easy way

THANKS....

Quote

Just so I am clear. I should leave the adhesive on and loosen both deflection coil screws. Start off adjusting the green yoke first while covering the red and blue optical lenses. Then use the same procedure for red then blue. Correct?

YES !!!!

Quote

What should I expect to see on the screen when I cover red and blue lenses and adjust the green yoke.

You should have the TV hooked up to an antenna , cable box or satellite or ??? & get a pix on the screen....
Another way would be to go into the customer menu , bring up convergence & get the crosses on screen...
Some sets including yours may have a "time-out" feature on the convergence so that after a preset amount of time the convergence turns off & reverts to the normal pix....
This is done so there won't be a burn-in of the crosses....

Quote

Should I put up the X pattern strings you suggested in the previous thread.

NO , maybe later....
For this adjustment all you want to do is level the pix in all 3 colors...

Quote

I do have the Avia calibrating disc if that would be helpful.

I have NO clue as to what that is OR how it would be used....Sorry....

Later....Ron.M.... Cool

....
Veteran & Retired TV technician

Ron.M
Veteran

Feb 2, 2011, 9:15 PM

Post #31 of 66 (5412 views)
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Re: [mjbxx] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

mjbxx;....

I tried the link below & got MY page instead...
Shouldn't I be getting YOUR page ???

https://www.opendrive.com/..._account/account.php

Even after I logged in , NO file....
I'm NOT happy with this new version of boxstr now opendrive...
Let's wait awhile & IF I need the missing part , we'll figure out a new way to transfer the file....
THANKS anyway.... Wink

....

Later...Ron.M.... Cool

.....
Veteran & Retired TV technician

mjbxx
New User

Feb 2, 2011, 11:28 PM

Post #32 of 66 (5405 views)
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Ron.M

"I have NO clue as to what that is OR how it would be used....Sorry...."

Avia is a home theater calibration disc used for geometry correction that has many test patterns. This is the center cross pattern. You should be able to see the tilt in the cross. It is definitely there. Avia's center cross should react to the yoke adjustments the same as the convergence center cross would. I would like to use this because the cross extends fully to edges of the screen, unlike the tiny covergence cross as seen below. Making it easier to see while doing adjustments.

Here is the convergence cross in the covergence menu.

Even the small center cross in the convergence menu is tilted as well. I am leaning towards the AVIA center cross. What do you think?

Ron.M
Veteran

Feb 3, 2011, 4:10 AM

Post #33 of 66 (5398 views)
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Re: [mjbxx] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

mjbxx;.....

Quote

I would like to use this because the cross extends fully to edges of the screen, unlike the tiny covergence cross as seen below. Making it easier to see while doing adjustments.

Perfect !!!! ....Looks GOOD to me....GO for it..... Sly

...

...

....

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Avia's center cross should react to the yoke adjustments the same as the convergence center cross would.

100% Correct !!!!....

Quote

I am leaning towards the AVIA center cross. What do you think?

See above jubilation.... Smile

...

....

....

When you are done , please post a pix (NO touchee convergence.....OK....)

GOOD LUCK..... Sly

....

Later....Ron.M.... Cool

....
Veteran & Retired TV technician

mjbxx
New User

Feb 3, 2011, 6:18 AM

Post #34 of 66 (5390 views)
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Ron.M

I am really looking forward to doing these adjustments. I just need to be clear on the procedures. Let me know if I am on the right track.

1- TURN RPTV OFF!!!

2- Loosen both GREEN deflection coil screws so I can confirm that the yoke moves in either direction while holding and preventing the yoke from sliding down the neck.

3- Once yoke movement is confirmed and in the upright position, I should tighten the deflection coil screws to a point that I can do the actual yoke adjustments.

4- BEFORE PERFORMING ANY ADJUSTMENT WITH THE RPTV ON, USE ONE HAND TO ADJUST YOKE TO PREVENT A DEADLY SHOCK!!!

5- Turn TV on, then cover RED and BLUE optical lenses and adjust the GREEN yoke for horizontal and vertical tilt. Once aligned, tighten both deflection coil screws being careful not to overtighten and damage the neck.

6- Adjust the BLUE yoke to horizontal and vertical tilt while covering GREEN and RED optical lenses.

7- Adjust the RED yoke to horizontal and vertical tilt while covering the GREEN and BLUE optical lenses.

8- POST PICS HERE BEFORE DOING ANY CONVERGENCE ADJUSTMENTS!!!

Can you be available for advice Thursday afternoon between 1pm and 5pm eastern time? I am located in North Carolina.

(This post was edited by mjbxx on Feb 3, 2011, 6:53 AM)

Ron.M
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Feb 3, 2011, 6:51 PM

Post #35 of 66 (5374 views)
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Re: [mjbxx] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

mjbxx;.....

Just to clarify this a bit;=>...

Quote

3- Once yoke movement is confirmed and in the upright position, I should tighten the deflection coil screws to a point that I can do the actual yoke adjustments.

You want the screws tightened up so you can still turn the yoke & release your hand & it won't slide down....
Kinda of a "snug" but firm feeling....If that makes any sense ...

Quote

4- BEFORE PERFORMING ANY ADJUSTMENT WITH THE RPTV ON, USE ONE HAND TO ADJUST YOKE TO PREVENT A DEADLY SHOCK!!!

Using one hand is a GREAT idea....
In the area you will be working in is not a deadly shock area...
Maybe just a just a "knock you on your butt" type shock.... Wink

...
When you put your hand on the yoke to turn it when the set is on put your fingers only on the grey plastic area above the red circle in the pix... Keep your fingers away from the front part of the yoke & off the SVM part.....

Quote

5- Turn TV on, then cover RED and BLUE optical lenses and adjust the GREEN yoke for horizontal and vertical tilt.

Makes more sense to cover the Red & blue when the set is off....
Then turn it on to make the adjustments....

My compliments on a nicely done step by step proceedure...EXCELLENT !!!... Smile

.....

Quote

Can you be available for advice Thursday afternoon between 1pm and 5pm eastern time? I am located in North Carolina.

That translates to 10:00 AM PST....
I WILL be online at that time....
I'm in the Las Vegas area.....
We don't shovel rain here....(About 3~4 inches a year !!!)
How many inches of snow did you get ????

Consider using a test pattern that has more than one cross...
I suggest you see if you can get a pattern that has some more horizontal lines particularly at the top & bottom...
Then you could take a measurement with a ruler or tape measure & measure at the right side & over on the left side to get as close to equal measurements as possible...
Measure from a line to the edge of the screen frame on both sides....
JUST a suggestion....

Later...Ron.M..... Cool

....
Veteran & Retired TV technician

mjbxx
New User

Feb 3, 2011, 10:20 PM

Post #36 of 66 (5364 views)
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Re: [Ron.M] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

Ron.M

"How many inches of snow did you get ????"
We were lucky enough to only have rain.

I did everything you instructed me to do with excellent results. Not perfect but really close. Here are some images. I ended up using the Avia crosshatch pattern.

Here is the BEFORE.

And AFTER.

Notice the top widescreen bar is thinner than the bottom.

Notice the ticker at the top is somewhat cut off.

Next step is adjusting the convergence. I will wait for your response before doing so. Then I need to address the widescreen bar issue. The top bar is thinner than the bottom. And you can see in the msnbc pic that the ticker across the top is cut off some.

(This post was edited by mjbxx on Feb 3, 2011, 11:42 PM)

Ron.M
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Feb 4, 2011, 12:43 AM

Post #37 of 66 (5355 views)
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mjbxx;.....

GREAT pix....THANKS.... Smile

.....

It's hard for me to see what you mean about the top & bottom widescreen bar issue...
Next , please post a pix with the Avia crosshatch pattern you used....
ALL colors on....

We'll take care of the bar issue in due time....
Get some string...
We/you may need it next....

The pix looks excellent , considering you did NOT touch the centering rings...Right ???

Later....Ron.M.... Cool

....
Veteran & Retired TV technician

mjbxx
New User

Feb 4, 2011, 3:00 AM

Post #38 of 66 (5351 views)
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Ron.M

"The pix looks excellent , considering you did NOT touch the centering rings...Right ???"

I did not touch the centering magnets at all. The crosshatch seems pretty good when comparing to what it looked like before the adjustments.

Here is the crosshatch pic.

The vertical centerline of the crosshatch matches perfectly with the screen frame vertical center marks above and below.

The horizontal centerline of the crosshatch is roughly 3/8" above the screen frame horizontal center marks on the left and right. It needs to be adjusted downward to the horizontal screen frame center marks. This relates to exactly what I am seeing on pic with the top black bar being thinner than the bottom black bar.

Notice black bar at top is thinner than the bottom black bar.

(This post was edited by mjbxx on Feb 4, 2011, 6:08 PM)

Ron.M
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Feb 4, 2011, 6:23 PM

Post #39 of 66 (5340 views)
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mjbxx;.....

After zooming in on the crosshatch pix , it looks like the centering needs to be set....
Did you measure both sides as I asked you or did you just "eye-ball" it ????
Did you get the string yet....
Also you will need some tape to hold the string on the corners of the screen....

Later....Ron.M.... Cool

....
Veteran & Retired TV technician

(This post was edited by Ron.M on Feb 4, 2011, 6:25 PM)

mjbxx
New User

Feb 4, 2011, 6:45 PM

Post #40 of 66 (5336 views)
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Ron.M

"After zooming in on the crosshatch pix , it looks like the centering needs to be set...."
Is your observation in relation to the horizontal crosshatch centerline?

"Did you measure both sides as I asked you or did you just "eye-ball" it ????"
I eye balled it to achieve that vertical centerline to match screen frame vertical centerline. And as best I could for the horizontal centerline.

"Did you get the string yet....
Also you will need some tape to hold the string on the corners of the screen...."
I have the string and tape.

(This post was edited by mjbxx on Feb 4, 2011, 6:47 PM)

Ron.M
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Feb 4, 2011, 6:54 PM

Post #41 of 66 (5331 views)
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mjbxx;....

May I suggest you measure the crosshatch horizontal lines of each color nearest the bottom on both sides for comparison ????
Or is that a problem for you ????
When you adjust for the horiz , the vertical automatically falls into place....

(FYI; ..The better you do this , the better the convergence will be..)...
Later...Ron.M.... Cool

....
Veteran & Retired TV technician

(This post was edited by Ron.M on Feb 4, 2011, 6:56 PM)

mjbxx
New User

Feb 4, 2011, 7:01 PM

Post #42 of 66 (5324 views)
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Ron.M

"May I suggest you measure the crosshatch horizontal line nearest the bottom on both sides for comparison ????"
Both measurements are roughly 1"

"Or is that a problem for you ????"
Not a problem.

"When you adjust for the horiz , the vertical automatically falls into place...."
I realized that after I made the post.

Ron.M
Veteran

Feb 4, 2011, 7:19 PM

Post #43 of 66 (5315 views)
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Re: [mjbxx] Panasonic PT53WX53 geometry off [In reply to]	Can't Post

mjbxx;....

I'm a late sleeper & haven't had my second cup of coffee yet.... Wink

...
So all my brain cells are not activated yet.... Wink

...

I edited my previous post...
Need to clarify & correct a statement....

Quote

May I suggest you measure the crosshatch horizontal lines of each color nearest the bottom on both sides for comparison ????

Should be from the "center" horizontal line & we need to make sure the measurements are the same for all the colors....

Quote

(FYI; ..The better you do this , the better the convergence will be..)...

Later...Ron.M.... Cool

....
Veteran & Retired TV technician

mjbxx
New User

Feb 4, 2011, 7:30 PM

Post #44 of 66 (5309 views)
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Ron.M

Quote

May I suggest you measure the crosshatch horizontal lines of each color nearest the bottom on both sides for comparison ????

"Should be from the "center" horizontal line & we need to make sure the measurements are the same for all the colors...."
OK. I will redo each of the three yoke adjustments measuring from the crosshatch horizontal centerline to the bottom part of the screen frame. It will take me about an hour or so to complete. And I'll post the results ASAP.

Quote

(FYI; ..The better you do this , the better the convergence will be..)...

Always the perfectionist, as I am. lol.

Ron.M
Veteran

Feb 4, 2011, 7:42 PM

Post #45 of 66 (5307 views)
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mjbxx;.....

HOLD THE PRESSES !!!!

I just want you to check the measurements ....
NOT redo them !!!!

Later...Ron.M.... Cool

....
Veteran & Retired TV technician

Ron.M
Veteran

Feb 4, 2011, 7:46 PM

Post #46 of 66 (5304 views)
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mjbxx;.....

Just cover up 2 colors & measure each color OR if you see NO red,blue or green bleeding on the center horizontal line , you should be good to go....
Just measure that one white line....

Later...Ron.M.... Cool

....
Veteran & Retired TV technician

mjbxx
New User

Feb 4, 2011, 9:11 PM

Post #47 of 66 (5300 views)
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Ron.M

I have redone the three yoke adjustments and must say that is better than before. I utilized a straight edge to get precise measurements.

Crosshatch

Pic

Can you see how thin that top black bar is compared to the lower bar?

Ron.M
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Feb 4, 2011, 9:22 PM

Post #48 of 66 (5297 views)
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mjbxx;....

Quote

Can you see how thin that top black bar is compared to the lower bar?

In the top pix (Crosshatch) I don't see any trace of black bars....
In the bottom pix (Video) I see what appear to be a thicker bar at the bottom than at the top....
Are you refering to the top pix , bottom pix or both ??? Later....Ron.M.... Cool

....
Veteran & Retired TV technician

mjbxx
New User

Feb 4, 2011, 9:32 PM

Post #49 of 66 (5290 views)
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Ron.M

"In the top pix (Crosshatch) I don't see any trace of black bars...."
There are no bars in the crosshatch pic. You should notice that the crosshatch is not vertically aligned by comparing the top to the bottom. The vertical position needs to be centered.

"In the bottom pix (Video) I see what appear to be a thicker bar at the bottom than at the top...."
Yes. I am referring to the bottom pix (VIDEO) only.

Ron.M
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Feb 4, 2011, 9:57 PM

Post #50 of 66 (5283 views)
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mjbxx;.....

Quote

The vertical position needs to be centered.

Time for the string....

Here we go;=>....

Tape one end of the string to the top left corner of the screen...
Tape the other end to the bottom right corner & draw out all the slack....
Tape another string from the top right corner to the bottom left corner...Draw out all the slack....

Now you have the center of the screen located....

In the pix below of your crosshatch , you'll see a larger "dot" near the center of the pix...

Cover 2 colors (Reccommend red & blue to start)....
Adjust the green centering rings to put the "dot" on the exact center of where the strings cross in the center....
IF the rings are stuck & won't turn , you may have to remove some of the adhesive holding them in place....
USE CARE !!!!
CAUTION:...I can't tell from the earlier pix what your rings are made from....
On some sets the centering rings are made from metal....
Some other sets the centering rings are made from a plastic type material that can & will break...
IF that happens here , you're screwed !!!
Check & tell me BEFORE you adjust them what they're made of....
I'll be waiting for a reply... Smile

...

After you do the green , do the other colors the same way....

When you are done , please post crosshatch & video pix...
THANKS.... Sly

....

Later...Ron.M.... Cool

....
Veteran & Retired TV technician

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