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Surface mount board repair?
drventure:
Anyone know anyplace that does that sort of thing?
I've got a panasonic ae-900u projector. it got a case of vertical red lines about a week ago. Turns out, it's a pretty common prob with these things.
There are 3 surface mount LCD driver chips (all the same from what I can tell) that control each of the RGB lcd panels. 2 of the chips are mounted to a single heat sink, so It's common for them to get hot, overheat and desolder themselves
That's exactly what Happened to mine. I poked around with it a bit and got the pins resoldered, and believe it or not, the thing started working again.
But now, It works perfectly fine for about 3 minutes, then the screen completely scrambles. I'm guessing the driver chip got hot enough to mess it up internally, and now, once it warms up, the chip gets screwed until it can cool back down.
I found the exact same driver chips online, but I have no idea how I'd actually desolder the old chips and install the new ones.
Anyone know anybody or any company that does that kind of repair work (I'm in the Dallas, TX area, local would be good, but anywhere would be ok).
Thing is, a whole new main board will cost me ~600$, which is about what I paid for the projector in the first place. So any repair that would end up close to that, wouldn't be worth it.
So, repair may not be in the cards anyway, but, it's worth exploring...
I was just totally stoked when, after using binoculars backwards to zoom in on those pins (because they're +unbelievably small+ little traces) and a little soldering and xacto knife wielding, I was actually able to get it to work properly again in the first place (even if only for a few minutes!)
northerngames:
possible to post some high res picks of the troubled area up close and what needs to be swapped out?
I may be able to help but need to see what's going on exactly.
drventure:
Thanks for the response!
Here's a shot of 2 of the drivers, there's 3 total.
I highlighted the damaged part in red. Looks like a pin came desoldered. I put a little flux on it, heated it with a torch and that "seemed" to do the trick. No more bars. The thermal grease was cleaned up before I reassembled everything to test, so I don't +think+ that's the problem.
But now it flakes out after just a few minutes.
This is pretty magnified. The actual chips are only about .5inch square. Those pins are friggin +TINY+. I'm sure I could get the chips off, but I have no way to solder news ones on.
I was able to find the service manual online, and find the chips themselves, they're about 44$ each. No idea whether one or both would need replacing, but I'm guessing both.
What do you think? Is it worth bothering with?
northerngames:
I have done xbox ram upgrade's on my own and they were a pain and these seem to be the exact same skill level.
if the xbox failed it was only like a $25.00 mistake where your 3 chips alone are $120.00+ and also something could happen to the motherboard itself wich is probably another few hundred.
to expensive for me to try and I would not suggest you try it unless your highly skilled in that type of stuff and have the correct tools like the hot air gun.
I would try to see if anyone actually does the xbox ram upgrade's still and if so they may be able to do it fast and reliably and also have the correct tools.
drventure:
Thanks
Yeah, I've been calling around here locally, but I haven't found anyone that would take it on yet.
I'm about to the point of calling it and start looking for another project. That Casio really +sounds+ good, but I can't find squat about it.
Well, thanks for looking and for the confirmation!
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