Question about Toshiba 36A50 36" TV
Over the last three months, the image slowly compressed from bottom and top. Earlier, I could leave the TV on for a few hours, and a full image would appear. Now there is only a 1-2" horizontal image going from left to right at the middle of the screen. Now I know this is probably a bad capacitor on the vertical output, but can someone tell me the exact possible locations of this capacitor? I have the skills to replace the capacitor I just don't know where it is?
Ok, The vertical Ic is IC301 Ta8427K And Capacitors around IC chroma 2.2 uf 50 volts. You will see small red capacitor ( with C302....4 or 5 ) reference. Replaced others capacitors on vertical section 220 uf 35 V or 100uf 35V. I hope this can help you. Or if do you have any picture chasis, send to me and I will show you where are the problem., Thank you
Posted on May 11, 2008
I just ran into this problem in July 2012. I noticed a thin white horizontal line at the bottom of the screen a few years ago. Then there two appear this year, then the vertical size would change up and down. A quick smack of the TV would fix it, then eventually a thin horizontal line. The sound worked fine. Noe Z Bernabe's solution clearly identified the problem chip. The hard part was finding a free schematic to trace down the chip's location on the motherboard. I found a free one here for the 27" TV and it identified the same location on the 36" TV.
The schematic location is Q301. You can't search on the keyword on the schematic pages. Look at page 37, towards the bottom right. There will be a mostly rectangle box around the chip with the upper left corner cutoff. It has 3 suboxes around the words, OUT, DRIVE and AMP. This video on how to discharge the picture tube was also helpful.
There is only one screw that anchors the motherboard to the TV and it is located in the bottom left back when facing the rear of the TV.
A quick way to find the chip is to look on the motherboard for a vertical aluminum heat sink that sticks up a > 3".
I did a quick resoldering of the 7 chip leads to the motherboard with a Weller soldering iron and a very little amount of solder. It helps to put the soldering iron on the chip's wire lead and then apply the solder wire.
The problem was solved and picture looks better now and has no white lines at the bottom!
Posted on Aug 04, 2012
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