Question about Samsung PCN5425R 54" Rear Projection Television

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Blue blurry on perfect focus

The blue on perfect focus was concave for a while. Then screen appeared darker one day and blue on the perfect focus barely shows its self. Please reply

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Re: blue blurry on perfect focus

Did you try the manual lense focus in the back? There is a wing nut on it and it's pretty easy to change. You just need someone to look at the TV and tell you when it looks good. Additionally for the Blue tube, it's on the far left. You take off the bottom panel in the back to get to this area. Good Luck.

Posted on Jan 22, 2008

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Blurry screen appears as 3d with blue discoloration

Go into the convergance mode and clear it up ,ther is also three knobs behind the press board one will adjust the overall background
color ,thew others focus.

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Replace the convergence Ic's with a kit that is available through your local parts distributor

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If you are not good at soldering and de- soldering have a local tv shop do it for you

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If all 3 colors are mis-aligned, you may have solder connections that blew a fuse. There are three fuses next to the flyback transformer, one usually blows causing this issue. Resolder the flyback solder connections and replace the fuse to fix.

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The red blue and green lines are at the top of the screen, the colors are out of focus and the picture seems concave. the menu has a convergence label,but it does not appear on the screen

The supply for the convergance circuitry is off the flyback (high voltage) transformer. There are three fuses to the direct right of the transformer. One of these is probably open. Also re-solder or replace the rectifier diode off the blown fuse. This should solve your problem.

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Mitsubishi 55" 1080HD

it sounds as though your convergence board is going out or gone out

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Everything on the screen has a blue shadow

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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.


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Hello, if you want I can supply you with the service manual, please leave your email. Best regards, Arpi

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Concave Images with pink and green colors

you can get it your tv fix the problem is in the IF amp and video circuit.a convergence will also be neeeded.the tv is old but can give you some more life call a tech they will be your tv doc.

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