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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue Feb 19, 2008 3:00 pm Post subject: |
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| sj64 wrote: |
It should be fine, and he's asked me to put the board back in and start tapping on components around the area I think the problem is to see if I can find the specific component.
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Although sometimes this method is used to locate the problem you should also know that this can sometimes cause more problems. Depending what circuit is going in and out, if its produceing voltage spikes, it could cause damage to other components. Just a suggestion.
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sj64
Joined: 02 Jan 2008
Posts: 34
Location: Sydney, Australia
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| Posted: Sun Mar 02, 2008 10:39 am Post subject: |
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Well, last weekend my friend came over, and thanks to the problem being revealable by gently tapping around on the DC board, we were able to narrow the area down enough to a specific area.
Once we found it, it made sense. If you look at a picture of this board, there's two long 'C' shaped heat spreaders that run down the middle of the board. It took a while, but we found the spot was near the bottom corner of the right heat spreader. So we re-soldered the joints arounf there, and problem was gone. Projector was running great.
It makes sense if one thinks about how the board flexes, say when everytime the top is hinged up - however the heat spreader does not flex, so joints in the area where the board is prevented from flexing will be under more stress.
'cheers
S.
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Tue Mar 04, 2008 5:32 am Post subject: |
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| sj64 wrote: | Well, last weekend my friend came over, and thanks to the problem being revealable by gently tapping around on the DC board, we were able to narrow the area down enough to a specific area.
Once we found it, it made sense. If you look at a picture of this board, there's two long 'C' shaped heat spreaders that run down the middle of the board. It took a while, but we found the spot was near the bottom corner of the right heat spreader. So we re-soldered the joints arounf there, and problem was gone. Projector was running great.
It makes sense if one thinks about how the board flexes, say when everytime the top is hinged up - however the heat spreader does not flex, so joints in the area where the board is prevented from flexing will be under more stress.
'cheers
S. |
Congradulations on finding the problem. And thanks for posting your conclusion. I see many post's on many forums while googling where they list the exact problem but never the solution.
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