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Get into service mode

Need to adjust green drive---have got putty skin tones---Have tried menu and adjusting contrast,brightness and colour no improvement HELP

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Re: Get into service mode

If it cannot be adjusted then there is a problem in tv. as your green color is absent you will get red+blue=purple your problem is in green video ckt please check 1 sypply to green cathode ckt 2 loose contact in crt base 3 loose signal connector 4 check components related to green cathode& green video tr. itself 5 check for green signal is coming to green video section from processor. 6 signal processor ic if you are not tech person get it done by skilled tech. it is a common problem. it is a not a major problem. please check

Posted on Oct 01, 2007

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Plano tv samsung

Adjust the brightness until it starts making the black in the picture slightly milks and back it off slightly
Adjust the contrast so that the whitest whites show detail, too much contrast and they disappear
Adjust colour to suit, start with it half way, look at flesh tones on a news reader as a guide and adjust sharpness so you can see detail but not so that there are false or visible edges around things

May 16, 2014 | Standard (CRT) Televisions

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Want to know how to adjust contrast

Very old set--always adjust so contrast not too high--it should always be lower than brightness---say brightness at 75% and contrast lower--if contrast set too high smearing will occur and picture quality will be affected.

Apr 08, 2012 | Standard (CRT) Televisions

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How can I adjust the screen so I can see the score of the football game it is cut off on my Panasonic TH-50PX75U

To do this you have to enter into the service mode, ie, factory setting modes, which oly will allow you to do the screen adjustments. Your TV needs vertical S-Correction, to avoid lower side stretch. Four methods to enter into the service mode are given here . Just try OK.

In Sound-Menu Low-tone-regel to MAX and

High-tone-regel to MIN. Press 'F' button on TV.

Then press VOL- on TV and REVEAL on RC in

some time. Select: red and green buttons.

Adjust: yellow and blue buttons. Store:
'STR'. Exit: 'N' on RC.

In Sound-Menu Low-tone-regel to MAX and

High-tone-regel to MIN. Press VOL- on TV

and RESET on RC in some time. Select: red

and green buttons. Adjust: yellow and blue
buttons. Store: 'STORE'. Exit: switch off.

ON: Press simultaneously 'OFF TIMER' on RC

and 'CH.UP' local.

OFF: Press simultaneously 'OFF TIMER' on RC
and 'VOL-' local.

Simultaneously press 'RECALL' on RC and
'VOL-' local. Exit: 'NORMAL' on RC.

After entering into this mode, be careful not to spoil the set. Mark all the initial values on a paper for refernce, and begin to chage the values. You may only have to chage the value of "SC".

Nov 22, 2010 | Samsung TXJ3678 36" TV

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Lines on the screen

If the lines are thin and spreaded allover the screen from top to bottom, and are equally spaced around one inch of so apart, it will be a screen voltage rise problem. You just decrese both brightness, contrast and colour contols of your TV to zero position, and look into, where there is lines are visible on the screen or not. You should notice this in a drak room, so as to see is well, or close all the doors and windows to make the circumstance to a little bit dark.
If you can see these lines still, it is clear evidence of the above said fault. To rectify this fault you should open your TV. Open the back cover of the TV, and you will see a Line Output Transformer. It is otherwse known as LOT. It can be recoganiized easely as it its size. Normally it will look black in colour and a thick wire from it goes the picture tube's final anode, and look like it is stcked to it with the help of a rubber ******. Other two wires from it goes to the picture tube base board. These two wires are, one for focus and the other for screen.
There will be two controls on the lot, which can be varied, and seem to be integrated with LOT. Among, upper one is for focus adjustment, and lower one is for screen adjustment. Both will be marked as "Screen" and "Focus". You just find out the screen control. With the healp of a screw driver it can be adjusted.
Keep the TV on, Brightness, Contrast and colour to minimum, adjust this control to a little [ a very little movement should be done, otherwise the picture will be get blurred], to just eliminate the lines you see on the screen. Focus control and screen controls are interactable, that is adjusting one may effect the other. After eliminating these lines just up the brightness and contrast control to at about their mid position and press the menu button on the TV or remote control to get the menu screen. Look at the letterings, and if it seem to be out of focus only, just adjust the focus contorl to get well focused captions. The adjustments are hot, that is while the TV is operating. Take care. Ok.

Oct 26, 2010 | Mitsubishi CS-40503 TV

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Some channels on my tv are dark and tinted orange, I used the menu button to display the menue and scrolled down to picture but I did not know how to select picture.

Adjust colour control to zero, and check for a pure black/white picture. Adjust contrast and brightness control to minimum and check whether the picture goes completly off or a slight picture prevails. If the picture goes out when you turn down brightness control to 1/3 position, that is about 20 points, your TVs screen voltage is very low, and it can be adjustable. If the picture does not go out and more brightness prevails, screen voltage is high. If the screen voltage is high, there will be some fine lines across the screen at about an inch apart; on the whole screen from top to bottom.
Screen voltage adjustment is critical for the clarity of the picture. If it is low, no proper colour will be dispayed. If it is high, it is harmful to both picture tube and your eyes.
Never try to adjust it without proper knowledge about it. The screen control can be located alongwith the LOT [Line Output Transformer], of your tv. There will have two adjustable controls there, one is for Focus, and the other is for Screen. Both are interactive, that is adjusting one will effect an other.

Oct 18, 2010 | Emerson TS2587D 25" TV

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1) I own a Quasar TV model# SP 3232A. I have a dark screen but good sound.What are the possible troubles. 2)Is a service manual available for this model

If the screen is dark, then the brightness and contrast adjustment must be poor. Use the MENU key (in the TV or the Remote, either) adjust the brightness and contrast as per your viewing convenience. Service manual for this model is not in my knowledge and you should not try to repair or troubleshoot it by yourself without proper knowledge of the circuit workings inside.

Jan 23, 2009 | Quasar SP-3233 TV

1 Answer

Well i really want to know what level the coular and brightness lvel has to be on a toshiba t.v

You can set these controls to your liking, though a lower brightness setting might increase the life of the screen. First, set the brightness and contrast to a level that is pleasing to the eyes, then adjust the color to look realistic - enough color without being disturbing. If faces area look greenish or purplish, then also adjust the tint (sometimes called Hue) until you get accurate flesh tone. Flesh tone is the best thing to adjust for; when you get good flesh tone, the rest of the picture will look great. ALWAYS make adjustments during a live news broadcast, which tends to have the most accurate balance of brightness, contrast, color level and hue. Note that commercials are all recorded in different studios with different settings, and will usually not look right - it's best to just live with this than to constantly readjust the TV. There are also DVD's available which walk you through proper TV adjustment.

Jan 02, 2009 | Toshiba 36AF41 36" TV

1 Answer

Green tint I can't seem to fix

Hopefully someone on here has a manual and can tell you exactly where the tint controls are. Also need to try adjusting the color level, turn it clear down so you have a black and white picture.
Is the picture still green over the screen with the color control
set clear down to black and white? If it does, you might
have an issue with the green gun going out or problem in the
circuitry to it.

By the way, the best way to adjust the picture settings on a
tv are to first turn the color control clear down, then adjust
brightness and contrast for best black and white picture, then
bring up the color level to where it should be and adjust the
tint for best red/green ratio.

May 20, 2008 | Mitsubishi CS-27205 TV

1 Answer

Color Problem after replaced Circut Board

When you replace the entire board in a Zenith TV, you must make the adjustments to align the new chassis with the old picture tube. You must adjust the CRT bias and drives as well as the horizontal and vertical parameters. On the older boards there were controls on the main and CRT boards but on the newer boards the adjustments are made with the remote control after entering the service mode. Tune in the shopping channel QVC, set the color and contrast to minimum and lower the brightness until the picture is just visible. Set the CRT bias settings for a pure black and white image, then increase the brightness and contrast to get a very bright picture and if necessary adjust the drive settings so that the bright picture is pure black and white. Return the video settings to normal and then adjust the vertical and horizontal settings so that the info boxes on QVC are centered top, left and bottom. If you are not sure that you can do that right then have a qualified tech handle it for you.

Jul 23, 2007 | Zenith SY3572DT TV

1 Answer

How do you exit service mode?

PANASONIC: Panasonic TV's after 1996 can be set to "Serviceman Mode" with the following remote control sequence: First, select the SET-UP icon and select CABLE mode. Then, select the TIMER icon and set the SLEEP timer for 30 minutes. Next, press the ACTION button twice to get out of the menus. Now, change to channel 124. Then, adjust the volume to minimum (0). You're almost there - Hit the VOL down button on the TV itself (not on the remote) and a red "CHK" should appear in the upper corner. Now, if you press the ACTION and VOLUME DOWN buttons (again, on the TV, not the remote) you will toggle between AGING and SERVICEMAN modes. Select Serviceman mode. The POWER button on the remote control will select one of the five Serviceman Adjustment modes. The modes are: B - Serviceman VCJ SUB Adjustments. These include sub-tint, sub-color, sub-brightness, sub-contrast, colorkiller/ABL/gamma,audio and video adjustment, and vertical size. C - Serviceman VCJ Cut-off adjustments. These include Red, Green and Blue cut-off, red and blue drive, automatic fine tuning(AFT), RF AGC (RF gain control), horizontal center, beam limit,etc. S - Serviceman Options Adjustments. These involce the PIP and clock. M - Serviceman MTS (Stereo/SAP) adjustments. CHK - the mode you first entered. Normal picture and sound, lets you check things over and still have a hotkey into the service menu. There is one more adjustment that isn't in the five modes, it's global. When in either the yellow or red CHK mode, you can press RECALL on the remote control to enter the purity firld check mode. This lets you select a pure white, red, green, or blue screen. A good thing to walk away from if you just want to temporarily freak out the floor manager, but it will be fixed as soon as the TV is turned off. To get out of Serviceman mode, press ACTION and POWER on the remote simultaneously for at least 2 seconds. The TV will momentarily shut off and then comes back on. If this does not help you will most likely need to get the service manual as you should always have that anyway before ever attempting any serve mode adustments. Also do not forget to ALWAYS write down all of the values that you change incase a problem arises. Good Luck

Mar 17, 2007 | Panasonic CT-27SF25 27" TV

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