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secstate
Joined: 20 Mar 2006
Posts: 720
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| Posted: Sun Oct 12, 2014 3:22 pm Post subject: Failures Over Time of R7625035 Horiztonal Shift/Focus Board |
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Folks it has been a very long time since I was last here. The Runco 1100 (sorta of a Barco Data 1209s but not quite) has been going strong until last night so not had much need to post. I have had my third failure of the R7625035 Horizontal Shift and Focus board in this projector.
Some background projector is one of two I acquired in 2009 that had fairly high hours this projector came with 14,500 on it and has 15,700 now (yes I don't use all that much). The horizontal shift and focus board original to the projector was shot when I got it. It caused a number of narrow vertical lines/banding to go down the middle of the screen. Pulled the one out of the spare projector and that fixed the problem for maybe 100 hours than same issue lines down the middle of the screen (at the time I just attributed it to the high hours on the projectors as that one had about 1000 more hours on it). Purchased another board and installed and that worked fine for the last 1100 or so hours then last night smell of burned resistor or semiconductor and lines were back. Swapped in another spare board and all is good but clearly there is another problem elsewhere in the projector (not surprising with the hours). I can see no obvious burn damage on the current board.
This board is the same as used in the 808s Graphics (at least the later versions) and is not the one normally found in "true" 1209s. Any ideas on what could be killing this board? Two is a coincidence three is a trend  .
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Oct 12, 2014 3:29 pm Post subject: |
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It is definitely a weak point of the set. Nothing really outside of the board can cause that board to fail. I'd have to see your boards to know what is failing, but I repair them regularly. #trendsetter
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secstate
Joined: 20 Mar 2006
Posts: 720
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| Posted: Sun Oct 12, 2014 3:42 pm Post subject: |
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| Curt Palme wrote: | | It is definitely a weak point of the set. Nothing really outside of the board can cause that board to fail. I'd have to see your boards to know what is failing, but I repair them regularly. #trendsetter |
Thanks Curt, I have thought about doubling up on the heatsink like the real 12 series shift/focus boards do since there is space for it in the projector and that might keeps things a bit cooler. I wonder if running 1080p pushes the boards because both boards in the projectors when I got them were original to the sets (serial numbers matched). One failed at some point prior to 14,500 hours and the other was still going until 15,500 hours+/-. Maybe I just got unlucky. Let me look at the parts pile and see if I have another spare if I don't I'll buy a board from you or send you one of mine to repair. As I'd like to keep a spare just in case at this rate.
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