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Color balance is bad. I need to re balance the bias and agins. Do i need a srvice code. I also need to adjust the focus

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Hi,
I need to know model number and brand of your tv to answer this question.
How old is your tv?
Thanks.

Posted on May 10, 2010

  • 2 more comments 
  • markadler May 11, 2010

    Sorry, wasn't paying attention. It is a CRT set Proscan PS32108. The blacks are very green and the focus is a bit out of optimum. I don't have a service manual, haven't found one in any search. I would assume that there is an adjust mode available from the remote, that might get control of the color balance.



    Don't know the age of it as it belongs to a friend of mine. It could easily be12 years old as a guess

  • Shahid Electronics
    Shahid Electronics May 11, 2010

    Service mode in tv was introduced in 2000 and I think your tv should have variables controls on CRT drive board for bias and gain controls.

  • markadler May 11, 2010

    I'll have a look inside and let you know. My Zenith was built b4 2000 and uses a service code to access the adjustments.

  • Shahid Electronics
    Shahid Electronics May 11, 2010

    No problem.
    Thanks.


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1) I have a Sony KV-32FS13 that has a green tint in the picture. Does any oneknow how to access the service menu for this model? I tried other adjustments and I can't get rid of the annoying green...


Code 5 is "AKB error". AKB, or auto kine bias, is a cicuit that monitors the three color guns of the picture tube (red, green and blue) and tries to adjust them for proper color balance. If it can't, the picture is blanked (usually) and the timer/standby light blinks 5 times. When the color drives aren't balanced, you see a color tint in the picture like you're describing.

There might be a problem in the AKB circuit, or the picture tube may just be old enough that the AKB circuit has run out of adjustment range. If the tube is at fault, you should consider replacing the set. A new tube will cost nearly as much as a new 32-inch LCD TV, and you'll need to pay someone to install it and set it up. There are special tools required to perform the convergence which gets the color guns aligned with the face of the tube so they hit the right colors.

If you'd like to try tinkering with the service menu adjustments, this site explains how to access the menu and gives a list of settings.

Jan 02, 2011 | Sony KV-32FS13 TV

1 Answer

The tv is at least 17 years old.The blinking red light blinks 5 times ,then the tv picture goes off . The voice is still on


Five blinks is the error code for an AKB (auto kine bias) error. What this means is that the set isn't able to balance the three color guns (red, green and blue) of the picture tube properly, and it's blanking out the screen.

To get the proper colors, the signals for the three colors need to be balanced, and Sony sets have circuitry to do this automatically. Other brands don't, and when they go out of balance you see a picture that starts to show tinting or colors that are off. As the picture tube ages, it gets harder to adjust the balance until finally the AKB circuit can't anymore, and poof, the picture goes away. With a 17-year-old tube, it's not surprising.

There isn't anything that can be done to fix the picture tube, it would need to be replaced. But the cost of the tube and the work required to get it set up after installation makes it completely uneconomical to repair this TV. A new picture tube is nearly $200. Then special tools are required to set the tube up (a process called convergence), so you'd need to find someone to put it in, and possibly pay to have the old one disposed of. A new 32-inch LCD set is around $350 now. Treat yourself to a new one.

Jan 01, 2011 | Sony FD Trinitron WEGA KV-27FS120 27" TV

1 Answer

When the screen is dark there are lines that run back and forth across the screen which is only noticable when pitcure is dark immage.


the screen bias needs to be turned down-ehind the front cover which is behind the grille there is a small black square about 3 inch square 6 little knobs sticking out 3 say in small letters screen and 3 say focus, don't adjust the focus just the screen for the coresponding color that shows up when picture is dark.best way to do this is darken the room and put it on video input with no signal if lines are white slowly
adjust 1 color after the other counterclockwise untill
lines disappear if only 1 color shows then only adjust the knob with the matching color. this is a very fine adjustment, to much will make your auto focus stop working. check it after you are done

Jun 20, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Picture color is pinkish and out of focus


there might be a problem with ur monitor.

Step 1 - check these pics on sumone else's comp or open sum other jpegs just to check

Step 2 - If the pics are fine on sum other comp then ur monitor needs attention

Otherwise

use Adobe photoshop

adjustments ----> color balance to get rid of pink tint

(

Apr 05, 2010 | Canon PowerShot A95 Digital Camera

1 Answer

Moved Hitachi rear Porjection HDTV and color has


you have a focus/screen control block 3on top for focus to each Tube R/G/B and 3 under them for screen drive to each Tube R/G/B adjust them!

Dec 31, 2009 | Televison & Video

1 Answer

Screen has too much green all of a sudden


Try balancing the tubes out, turn your color all the way down and the brightness in the middle, then find the focus block, it will be a block with 6 controls one row will say screen the other will say focus near the picture tubes, adjust the screen controls(one control for each color) until the picture has a good black and white look to it, then turn your color up and it should look fine. This is how i balance out the picture. But there is another method that allot of techs use, the other method is to adjust the brightness up until you see what is called retrace lines it is a jagged line going down the screen, once you see these lines back the adjustment down just until they disappear. Do this for all three colors. This method works but on an older set can throw the white balance off because of tube wear.

Sep 03, 2009 | Hitachi 57F500 57" Rear Projection...

1 Answer

No blue just red and green tint


adjust the blue bias on the high voltage block .
it has focus and bias for all three colors

Dec 26, 2008 | Samsung PCL5415RB 54" Rear Projection...

1 Answer

Sony 65 inch rear projection


behind the front grille there is a wooden panel remove it and yo will see a small black epoxy box with 6 knobs sticking out from it.
with the color turned down all the way, look closely for r,g,b on the box beside each knob this denotes which knob is for which color.
you need to adjust the 1 marked g on the bottom row. this adjusts the green bias to the green tube. this will get rid off the whiteish lines. adjust this knob counterclockwise in a darkened room untill the color shows a black and white picture. adjust slowly as the set will be monitoring what you are doing and will adjust itself as you adjust. bring the green down just enough so you don't see anything, make sure that you don't see red or blue either, if you do also adjust untill you don't see any color. these adjustments should be done with the input set to a video input that has no signal coming in the set will show the input label and nothing else.
when you have the raster( screen ) all dark you can go to an input with a signal and make sure the image is black and white adjust the bias of the color that is too much so that it is black and white.
hope this makes sense to you. now turn the user color control back to where you want it.you are done. reassemble, enjoy
you might have to do this again in a few months as the control you have adjusted are dirty and can't be cleaned with a cleaner.
moving these controls cleans them but the color balance procedure would have to be completed after such movement of these contols and any quick movement would have to be done with the set turned off. a quick back and forth movement will do a better job cleaning the tracks inside that adjustmet block but will mean you will need to do the setup adjustment all over again in order to get the screen blank and the color to balance to black and white. the top 3 knobs are for focus of the individual colos only adjust if the red, green or blue isn't sharp, you can try these to see with out doing harm. finally if thebias is too low then th lifgt on the front of the set might blink at you and the auto alignment might get part way through and stop. if this happens you need to bring the bias adjustment back up slightly. adjust only the bias for the tube that has too much color to start with and if this happens you will know that the bias control you just adjusted is the 1 that needs to be adjusted slightly.

Sep 22, 2008 | Sony KP-53V75 53" Rear Projection...

1 Answer

Focus


Use the Setup menu to select English or Spanish as
the language for the menus and on-screen displays.
Adjust Color Balance Automatically or manually
(PerfectColor TM) using six colors, Magenta, Red, Yellow,
Green, Cyan and Blue. Reset the Color Balance to the
factory default settings. Align the focus (convergence)
of the TV's projected light beams or reset the focus to
the factory default settings.

Jul 01, 2008 | Mitsubishi WS-65515 65" TV

1 Answer

Hitachi 53UWX10B 53 convergence color lines dont move w\RC


After replacing IC's, double check the solder connections for bridging or no solder on pin(s). Check all bias resistors (low ohmage). Make sure you have your VCC voltage, should have a positive/negitive voltage of about 24 v on each IC and +38v.Also, make sure all cables are plugged in and fully seated

Note: All bias resistors are very low ohms eg; 3.3, 1.8, 2.2 make sure correct value, very important.
If can't adjust still CPU digital convergence board (near ic's) shielded may be defective.

Feb 23, 2008 | Hitachi 53UWX10B 53" Rear Projection...

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