Question about Mitsubishi CS-40503 TV

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Mitsubishi 40" tv

My tv has a very narraow horizontal band of picture. You said in another similar post, that it was "Bad connection vertical output IC.........T". How would I fix this? Same horizantal picture about 6 inches in width. Remainder area is blank.
Current service guy says parts (???) are not available to repair this problem. I've been waiting for 6 weeks for service guy to fix this

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Techexpert12 is right!!! I had the same vertical compression in my Mit CS-40503. 15 years old and still great. From the rear of the set the circuit board on the right near the front of the set has a group of capacitors near the vertical deflection IC (IC401). This is a LA7833 on a 3x3x1” heat sink (7 pin SIP). One capacitor (C935) had an oily patch around it (100uf, 50 v). I replaced this and C934 from radio shack and resoldered stuff in that area. Now all good.
I took some pictures with d camera to remember connector placement. Warning – wicked high voltage on that big old tube.

Posted on Jan 10, 2009

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Check the vertical circuit some of the capacitors would have bulged up and you can normally see that on the boardremove that get the same ic from the hard ware shop fix through soldering and its done. whatever you do do it slowly and care fully, because hurry always makes worry.best of luck

Posted on Aug 14, 2008

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Regardless of the model number, the problem is in the vertical circuit. There could be poor solder connections, bad capacitors and /or a defective vertical IC. If you know how to solder, you can fix this yourself. Look for a small flat IC with about 11 pins. It may be marked LA7837 or something similar (post the marking here so I can confirm the correct part). Resolder the pins on that IC first. If that does not resolve the problem, replace the IC. If the replacement does not completely resolve the problem, then some of the capacitors in the circuit are defective.

Try the items listed above first. It those fail, update this and I'll detail the mext steps.

Dan

Posted on Jul 29, 2008

  • ABRsvcs Jul 29, 2008

    Forgot to add that the parts may not be available from Mistubishi, but are availale generically from many suppliers.



    Dan

  • ABRsvcs Aug 14, 2008

    As I stated before, the parts ARE available for this as I have repaired a number of these. I don't recall the specific part number, but if you follow the instructions above and report back here with your findings, we can proceed to resolve this for you.



    Please update this so we can proceed.

    Thanks,

    Dan

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You need to replace the vertical amplifier. You can order parts online at many sites. Try partsore.com


Posted on Jul 29, 2008

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I would like to know the model# of the tv..

thanks

Posted on Jul 29, 2008

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