View Single Post
  #3  
Old 01-24-2021, 04:45 PM
PortableTV PortableTV is offline
VideoKarma Member
 
Join Date: Dec 2020
Posts: 13
Quote:
Originally Posted by JohnCT View Post
It almost sounds like someone took this apart and got the polarizer sheets installed wrong in front of the LCD module.

It could also be a circuit problem. Most electronics in those days used "fish" caps: small surface mount electrolytics that go bad. We used to change several hundred a week when we did camcorders.

If the TV seems to improve with run time, that could be it. Also, putting it in a warm spot (like near a radiator) and warming it 20 deg above room temp may also improve it. Most thermal issues are cap related.

EDIT: is there also a "contrast" control in addition to the bright? Viewing angle changes dramatically with contrast and brightness with LCD screens even when working as designed.

John
I opened it up - what a nightmare

I found a blown cap on the back of the LCD PCB. I jiggled it with a toothpick and the image cleared up straight-on. Off to Mouser for new caps.

John, there is no contrast control on this TV. It just has "bright" and then a red/green "tint" knob on the bottom.

The image is surprisingly poor and low resolution. I believe this TV was made in 1990 but the screen quality looks like something from 1986.

Another question John - Do you take on repairs for these mini Casio's? I'm burning out
Reply With Quote