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Vertical adjustment I took the cover off, but i can't find the vertical adjustment. I found screws labeled focus and screen, but nothing similar for the vertical. Any idea where it might be?

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  • Joe Shuler
    Joe Shuler May 11, 2010

    what is the model of projection tv you are working on?

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I got your previous post. normally, the adjustments are toward the back following the back side of the main board, if they are not there, then they are sprayed all around the main board itself. things to look for are:

vert.
vadj.

I'm looking for a service manual for your tv 27pt9015d. still not having any joy finding this manual. the problem you are experiencing is technically called "vertical fold over", if there is no adjustments, then it's circuit controlled and will probably need servicing.

Posted on Jul 03, 2008

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Hey everyone. I have a Hitachi Rear projection Tv 53udx10b. I just replaced the convergence chips and cleaned all 3 CRT tubes. The picture definitely looks clearer now but the white tint has a slight...


You can try adjusting the color output. There are two ways to do this:
1) In the service menu (I don't know the codes or parameters...) I will not cover this for lack of info.

2) Via the focus block (Very touchy and difficult to get the mix right again if you get too far off)

If you take off the front cover there should be a access panel. Behind that, there should be a small square black box with 6 screws on it. This is the focus block. (At least this is where most of them are located)

It sounds more like you may need more red in the mix or just less blue and green. There is a screw for each color. Do not mess with the focus screws, just the ones labeled 'SCREEN.'

Barely turn the red up.
Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn andy of these up too high or damage may occur and the TV may detect a short and shut off.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful.

Apr 19, 2010 | Projection Televisions

2 Answers

Faint red lines in a curved arch like pattern


For this problem, what you have to do is here I found this solution: Right below your speakers on the right and left side are tabs. Pull out the tabs and remove the screw on eachside. Once that is done remove the speaker cover and you will see a fiber board cover in the middle of the tv, there will most likley be twist ties holding some wires, to make it easier to work remove the ties. Now remove the screws on the fiber board and pull it off. You should see 3 adjustments on the top for focus, do not touch those. Below the focus adjustments on the bottom is the blue, red, and green adjustments (they should be labeled). All you have to do is turn adjustment screw slightly to the left(or counter clockwise) and it should clear right up. That should do the trick, Hope this is helpful. Please dont forget your rating.

Jan 26, 2008 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Red Lines through picture when screen is dark, back ground has a red tint. On my 48 "Sony Rear Projection" TV


You can try adjusting the Red color output. (Very touchy adjustment)

If you take off the front cover/speaker cover, there should be a access panel. Behind that, there should be a small square black box with 6 screws on it. This is the focus block. (At least this is where most of them are located)

It sounds more like you may need less red in the mix. There is a screw for each color. R, G, and B. Do not mess with the focus screws, just the ones labeled 'SCREEN.'

Go to an unused input where the screen should be dark. Barely turn the red down in a dark room so that the red spot is at the same level as the Blue and Green.

Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn any of these up too high or damage may occur and the TV may detect a short and shut off.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful.

Apr 19, 2010 | Sony KP-48S75 48" Rear Projection...

1 Answer

Picture is very blue most times.This is a light blue, but makes viewing difficult. Also before this issue came about, you could see a faint set of arcing lines running across screen especially when screen...


You can try adjusting the Blue color output. (Very touchy and dangerous adjustment)

If you take off the front cover/speaker cover, there should be a access panel. Behind that, there should be a small rectangular black box with 6 screws on it. This is the focus block. (At least this is where most of them are located) If there is no front panel, It may be located on or near the flyback (High Voltage) transformer on your model accessible from the back instead.

It sounds like you may need less Blue in the mix. There is a screw for each color. R, G, and B. Do not mess with the focus screws, just the ones labeled 'SCREEN.' They may have silicone over them to prevent them from moving. If so, you will need to remove it and put more on when adjustment is complete.

Go to an unused input where the screen should be dark. Barely turn the blue down in a dark room so that the Blue spot is at the same level as the Red and Green.

Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn any of these up too high or damage may occur to the tubes. If you turn them up too much, the TV may detect a short and shut off. this is a normal fail safe. These only need VERY slight adjustments.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful. Once again - LETHAL HIGH VOLTAGES ARE PRESENT WHEN UNIT IS ON!!!!!!

Apr 19, 2010 | Sony KP-65WS500 65" Rear Projection...

1 Answer

Blue outlines on screen. not a screen burn or convergence problem


I am not familiar with that particular model but most are similar.
It may need the blue focus adjusted. Most tv's have some type of automatic focus. If the blue is out of focus it can "bloom" beyond the red and green. There should be a focus block with 6 adjustments (2 rows of 3) behind the speaker cover. I wouldn't mess with the one labeled screen or block. Adjust very carefully. They are usually in the order Red-Green-Blue with the focus on the bottom row.

Mar 02, 2010 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Apex out of convergence


I have this TV and have fixed this issue. If you cannot adjust Red or Blue convergence, then your STK ICs are defective. The signal board or Digital convergence board is not able to adjust sig lines on the deflection board so pushing buttons does nothing. The STK's are your amplifiers for vertical and horizontal. This will require dissassembly and soldering. You'll need 2 STK392-020 IC's and 125v/5A pico fuse or buss fuse..

The STK's are mounted on 2 massive heatsinks. Can't miss it. Word of advice, LABEL the 3-4 Pin plugs B,G,R from left to right. These are your Vertical and Horizontal coils for each tube. Don't mix them up. I did and the tv survived luckily. Chances are if your STK's poped, then they took out the -25v line. Take out the power supply that is mounted vertically on the right. Look for a row of axiel lead fuses with "SOC 5000" printed on it. They look like white rectangular blocks with leads. Check them all. Particularly RF817. Sits next to RF814. The service manual lists it as a fuse and NOT a Resistor-Fuse like the label suggests. I found more than one typo like this. I replaced mine with a generic 125v/5A fast blow buss fuse. Soldered in a holder for it. Should work the same.

Took me abit to realize it was a fuse on the power supply. This -25 line traces to W057/W058 next to the first STK chip. Explains the symptoms.

May 12, 2009 | Apex Digital GB55HD09W 55" Rear Projection...

1 Answer

Samsung Rear Projection Problem (not convergence)


The tv has 2 focus adjustments for each tube, mechanical and electrical.

1. Mechanical focus is set by looking at screen from back (through inspection plate on back of most samsungs) and rotating the lens assembly on CRT. loosen wing nut and turn lens assembly to go through focus and back to best position.

Put convergence pattern on screen and manually misadjust bottom red and green lines convergence so they can be seen through inspection hole.

With back cover of TV off you can usually reach your hand up beside the lens assembly to loosen the wing nut then rotate to adjust. Green is in the middle. The focus will be obvious when you rotate and look

When you are finished make sure the foam dust protector is not over any of the lens assemblies and the wing nut is tight.

2. Electrical focus - located at front of unit. the front grille/speaker cover is removed and maybe a cover over the front crt inspection hole.

In the inspection hole there is a black plastic "Focus/screen adjust Assembly" with 2 rows of 3 controls.

One row is focus and the other is screen. The middle controls are for green with R/B on either side. Usually the controls are labelled as "focus" and "screen". You want to adjust the focus controls, one for each color. Look for the focus or screen label imprinted in the plastic. Don't play with the screen settings.

With the same misadjusted convergence pattern you can see a red, blue and green line. Adjust green focus and watch green line for best focus. Do same for other 2.

Screen adjustments are very exact and delicate. The easiest way to deal with them is to turn color off in Customer adjust menu. Put any color tone adjustments in the middle (low, med, high, put at med).

You should have a b/w picture if there are no crt or other color related faults. If it is close to B/W leave screens alone.

If the pix is too green, then the green screen setting must be reduced a small amount. Do not play with these adjustments as most TV repairrers have a difficult time adjusting them.

If focus adjustments don't help then focus control or CRT may be defective. Needs expert to determine.

easyab

http://calgaryconvergencerepair.weebly.com/convergence-ics.html


Jun 24, 2008 | Samsung HCM4216W 42" Rear Projection...

3 Answers

Sony kp-51w5510 rear projection tv convergence


Lateral red or blue movement is accomplished electronically
via convergence alignment circuitry controlled by STK type IC's
Replace them both for reliability, then adjustments will work..

Nov 26, 2007 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Pt-47WX42 Need To Adjust Color


it's called the front grill assy ,look around the rear for support screws if none then just pry it loose ,your looking foe the focus/screen block to adjust .

Oct 29, 2007 | Panasonic PT-47WX42 47" Rear Projection...

10 Answers

Faint red lines in a curved arch like pattern


Guys I did this myself real easy. Just don't turn the corresponding screw too far. Only need to adjust it until the lines go away. Do it on a darker screen so the lines are more visible. I did the red 2 years ago and the green 6months before that. The blue lines are coming on my screen now and I've fixed it in 10 minutes. The TV is amazing.

Apr 10, 2007 | Sony KP-51WS500 51" Rear Projection...

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