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Toshiba CRT Projection TV no picture 51H83    
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Joined: 31 Jan 2017
Posts: 1

PostPosted: Thu Jan 17, 2019 1:25 am    Post subject: Toshiba CRT Projection TV no picture 51H83 Reply with quote

I am an experienced tech and have fixed lots of these. I have removed the chassis to my shop and have been unable to get the CRTs to light up ever since. In the customers home, it worked ok, but had a fuzzy pic with very little color after s few minutes-initially it was a fine though dim picture. I have a service manual, and have verified that all the power supply voltages are normal and have checked that I have about 30 volts of horiz freq on the heater output from the deflection board. I can see it has high voltage by putting the scope probe near the main Hi voltage lead and seeing horizontal induced voltage. The only thing disconnected and left at the customers home is the speakers, the IR module for remote, and the sensors around the screen Toshiba has for image improvement at the edges.
Does anyone have any ideas? I'm about ready to tear my hair out! Wink
Thanks in advance.

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