Question about Mitsubishi CS-40503 TV

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Picture Size I Can't find the right picture size on this Samsung even if go wide panoram zoom1 zoom2 or 4:3 I can't see the bottom or top of the image. Very annoying when you watching a game can't see the score. Can somebody Help me Please Mitsubishi 40 inch tube cs- 40503 picture too big for screen- can't see score! - Mike

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  • coloursmtb Jan 01, 2008

    Mitsubishi 40" tube model CS-40503- picture too large for screen- signal runs through cox cable box- can this problem be fixed externally? Mike

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The problem is somewhere in the vertical circuitry. It could be something as simple as a leaky capacitor that builds up and throws the amplifier off bias. Or it could be the entire IC chip that runs the vertical.

In other words, there are a number of possibilities that will give you this symptom; the only way to find out is to have an expert tech do a diagnosis to find out the exact part. There are more than 1,000 parts associated with the vertical/horrizontal deflection system and anyone of them could be a part of this difficulty.

You could just replace the entire vertical module, but it would be very costly and, still, may not solve the problem.

So, it sort of depends on how badly you want to do it by yourself and how technically inclined you are. It is NOT, under normal circumstances, a home remedy. I does require some electronics know-how to fix.

Now, the really bad news: This set is very old. It is statistically very likely that if you do fix it another problem will pop up soon after it is repaired. It is just the nature of electronics when they get old. The fact that one part out of 2,000 or 3,000 has failed that it is highly likely that another part is ready to fail near the same time. You could be nursing the set for years to come and end up putting more time, money and sweat equity than it is worth. That is the biggest decision you face.
I looked to see if I could find you a service manual online, but did not find it anywhere. Also, I checked the Sams Photofacts page and they do not have this model - it is too old. Normally, they keep only about 8 years of data. You may be able to get one from Mitsubishi. If not, you would have to find a tech who knows how to trace the circuit from visual inspection - which most of them do, now days.
Sorry for the hard news.

Posted on Jan 01, 2008

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  • Master
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For Factory Menu, press MENU 1 3 7 0
Service Adjustment Mode, press MENU 2 3 5 7
Convergence Mode, press MENU 2 3 5 9
Use the VIDEO or VIDEO buttons to enter two different groups of adjustments
Use the VIDEO / VIDEO buttons to toggle thru the adjustments
Use the + and - keys to adjust
When finished with adjustments, press ENTER to save
Press MENU twice to exit service mode
NOTE: If the above MENU number combinations won't work to enter service mode, try one of the following:

MENU 1 2 5 7
MENU 1 2 5 9
MENU 2 3 5 6
MENU 2 3 5 8
MENU 8 2 5 7
The adjustment you need to make is the VERTICAL SIZE OR HEIGHT ONLY to shrink picture

Posted on Jan 01, 2008

  • 2 more comments 
  • TV Doctor
    TV Doctor Jan 01, 2008

    Use service adjustment mode

  • TV Doctor
    TV Doctor Jan 01, 2008

    I'm Sorry, I failed to mention that you must have the original remote control

  • TV Doctor
    TV Doctor Jan 01, 2008

    If you can't see the top and bottom is cut off believe me it is an adjustment as I mentioned. with the remote! Not too old since it has zoom

  • TV Doctor
    TV Doctor Jan 01, 2008

    Primarily Menu 2 3 5 7 There you will see the height/size adjusment

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May be its a convergence problem?
did u try auto convergence?

Posted on Dec 30, 2007

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