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menec
Joined: 17 Dec 2008
Posts: 74
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| Posted: Thu Nov 12, 2009 9:55 pm Post subject: What is this mod good for? (on a Marquee Vertical Board) |
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Hi,
this Vertical Board caused me a lot of trouble. In short: Top/Bottom pin settings are lost after powering down the projector. On closer inspection I realized that the previous owner of my set has done some (not so nice looking) soldering job on the board. He swapped/replaced 14 resistors. I suspect this mod to cause the problems, but I'm not even sure for what reason those parts were replaced.
Can somebody tell me what this could be good for?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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menec
Joined: 17 Dec 2008
Posts: 74
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| Posted: Thu Nov 12, 2009 10:25 pm Post subject: |
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The writing on the board says: VERTICAL BD 50 2330 02P ISS.1
Probably the rest of my PJ is an Ultra as well. I do have the FGM which gives me some extra geometry control for Top/Bottom and also the replacement Vertical Board is not working without the fly wire in place.
And looking at the quality of the soldering job I'm pretty sure those resistors were not replaced by Marquee 
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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menec
Joined: 17 Dec 2008
Posts: 74
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| Posted: Thu Nov 12, 2009 11:11 pm Post subject: |
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Yeah, the CVA has the green fly wires and some additional resistors as well...
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Fri Nov 13, 2009 12:08 am Post subject: Re: What is this mod good for? (on a Marquee Vertical Board) |
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| menec wrote: | | Can somebody tell me what this could be good for? |
i've been on the forums for over 6 years and never read a discussion where those parts were recomended or even discussed to be replaced. Whoever did it was experimenting, sounds like a failed experiment too.
They are 1% precision resistors though, I would simply go through the factory parts list and see which of them has the wrong values. Also, make sure "they" didn't put in a metal film in place of a fusible, potential fire hazard.
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menec
Joined: 17 Dec 2008
Posts: 74
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| Posted: Fri Nov 13, 2009 6:44 pm Post subject: |
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That doesn't sound too good. Maybe one of the chips got toasted during this experiment...
| Quote: | | I would simply go through the factory parts list and see which of them has the wrong values. Also, make sure "they" didn't put in a metal film in place of a fusible, potential fire hazard. |
Can you point me to a page where I can get those part lists?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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