Question about Texas Instruments Voyage 200 Calculator
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Posted on Jan 02, 2017
SOURCE: Screen is half Black
The ribbon cable that controls the screen is damaged (or the liquid crystal has baked out... tis happens when the unit is exposed to high temps or long periods of direct sunlight). From my experience w/ these calculators they cannot be repaired.
Posted on Sep 11, 2007
Hi, and sorry for my english !
Maybe the LCD driver voltage is wrong or noisy. I had the same problem: some vertical lines (not constant), pulsing contrast after powerup, pixel crosstalk, sometimes no screen
Solution: Try to replace the LCD power negative voltage buffer capacitor.
In my hardware version it is in the middle of the two T6B07 column driver IC (U3&U4) on the right side. Colored black, electrolytic type and the Value is : 10uF/25V. Chage it to around the same type.
There is enought space, so you can use a small sized non smd type capacitor. Be care of the polarity.
I hope it will help... ;)
Greetings from Hungary!
Posted on Mar 23, 2009
The liquid crystal is damaged. I suppose the screen can be replaced. Check with Texas Instruments resellers (usually academic bookstores): they may be able to tell you where you can have the calculator serviced.
You can post an ad on the college bulletin board
OK for batteries to be dead
But calculator must be alive.
Hope it helps.
Posted on Sep 14, 2009
SOURCE: Display Screen Voyage 200
got the same problem.. its annoying.. sometimes its only 4 vertical lines but on average 9 - 11.... on and of 100x ;) didnt help for me..
if anyone knows which capacitor to change i would give it a try.. anyone has a clue?
Posted on Jun 06, 2010
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