#31
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Cheers,
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Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#32
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Okay...decision time.
I think what I am going to do is purchase a used YSUS board and install that. I have tested most of the other boards in the TV and see no reason to believe the board will be damaged if I install it. One question, though: If the donor TV's screen was cracked while it was in operation, or it was powered on after being cracked, would the board harm itself or my TV?
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Sony Trinitron Fan |
#33
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Best to get a known working, tested good, board. |
#34
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I do know that this seller will take the board back less return shipping if it doesn't work. Now, all I need to worry about is my set damaging his board...
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Sony Trinitron Fan |
#35
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Well, the replacement YSUS board is on its way. Wish me luck in keeping the magic smoke contained! I'll report back once the 'new' board is installed, hopefully with a photo of a happy TV.
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Sony Trinitron Fan |
Audiokarma |
#36
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The replacement YSUS board came in today. I checked the fuses and did a visual inspection...all looks good. Upon installation, still no picture! When I turn the set off, there is an ephemeral, barely perceptible flash on the panel. I also noticed that all three heat sinks on both sustain boards don't get nearly as warm as they did before, and in particular, the larger of the two YSUS heat sinks stays stone cold. No fire or smoke, though! Upon closer examination of the new YSUS board, I found the small surface mount fuse near the bottom row of capacitors to be ...odd. With my multimeter, it tests differently than good, but not completely open. I guess this is the problem? I'll probably ask for my refund now, and hope a better board becomes available.
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Sony Trinitron Fan |
#37
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Success
I got YSUS board #2 in the mail today and checked ALL the fuses. Finding everything good, I put the board into the TV, reconnected everything, plugged in the power, turned the set on, and...was greeted with a nice bright picture! It's been running for several hours now and still going great.
I do notice a bunch of grain or static in certain parts of the picture, especially when it's dark. Any idea what's causing this? The set also runs really hot. Is this normal? I don't want those damn IPMs popping again!
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Sony Trinitron Fan |
#38
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It's been a couple years since I worked on one of those models. But if my memory serves me correctly, there are a couple pots on the Y/Z boards that you can tweak to fix the "sparkles". Seems like one of the main ones was labeled "Vscan" or something similar. I am sure there is a "correct" way to do it with a meter, but I always just did it hot and eye-balled it. Maybe somebody who has worked on one more recently can jump in with more up-to-date info.
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#39
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__________________
Sony Trinitron Fan |
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