Question about Hitachi 50UX26B/27K 50" Rear Projection Television
I have a Hitachi 50ux26B made in 1996.
The picture was acceptable and the convergence was correct when it will actually stay on.
Inside all of the Green LED's come on for a few seconds to a few min but eventually the TV shuts itself off and the only LED left on is the Red one with the word Protection near it.
There are 5 green led's that I can see. 2 I can not get the numbers of because they are on the other side of the heat sink but the ones on the left of the heat sink are D951, D952 and D950.
I am not sure but I think the board number may be JK03161, however there is a large white sticker with AP63 on the board for the AV inputs and the same type of info on the board AP6X Sigma. I am comfortable using a soldering iron on the TV because if it won't work without my help it may be on a trip to the scrap heap. After selling the parts that would be useful to someone else that is. Waste not, want not.
I have downloaded the service manual however is a there a trouble shooting manual, or does anyone know which items may be at issue in this TV from past experience?
There is a chance that the one of the power relays are causing the problem. They have been known to be intermittent and even work for 5 sec. or 5 days before failing. When the back is off, turn the set on and when it shuts down lightly tap the relay/s in the power supply lightly and see if the set comes on for any length of time. If it does, replace the relay
and you will fix the problem. Let me know what you find.
Hope this helps,
Posted on Jun 30, 2009
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Posted on Jan 02, 2017
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