emergency help needed on make trax

kcfreeloader

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I've got to get make trax finished quick. I've recaped it and put everything back together and I get this
2011-08-02_18-48-32_95.jpg

the black bars are the camera but the image is scrambled
I get an okay image when I hook up my pattern generator.
i've pulled, sanded and resocketed everything.
I sanded and cleaned the edge connector.

Now what?

Thanks
 
have you adjusted you hold on the monitor chassis? just because the signal generator gives a perfect pic doesn't mean that the pcb output isn't different enough for the image to need adjustment. There is clearly an image on screen it is just skewed.
 
have you adjusted you hold on the monitor chassis? just because the signal generator gives a perfect pic doesn't mean that the pcb output isn't different enough for the image to need adjustment. There is clearly an image on screen it is just skewed.
Thanks. I didn't realize that. I mangaed to jump the board to a different monitor and it worked fine. So it looks like im just adjusted way out of wack
Thanks and +1 rep as soon as I get to a real computer.
 
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on the right hand daughter card, there is a potentiometer inside a small square tin can that might be out of adjustment. kinda hard to get to but if you use a long adjustment plastic screwdriver, it can be accessed

also Ken Layton says that R352 is starting to go out of spec on the same daughtercard
 
on the right hand daughter card, there is a potentiometer inside a small square tin can that might be out of adjustment. kinda hard to get to but if you use a long adjustment plastic screwdriver, it can be accessed

also Ken Layton says that R352 is starting to go out of spec on the same daughtercard
Thanks!
I got it most of the way fixed with the holds. I was under pressure to get it finished and just didn't realize that because my signal genartor worked that the monitor could still be way out of adjustment. I'll check that resistor too.

My only other problem i am having is i am getting a kind of power flash on the monitor. It's like the power goes off for just a part of a second then comes back on. Banging on the case does not make it happen and the longer it warms up the less it happens. After a while it goes rock solid and no longer flashes. Flyback going bad?
 
Is the flash a flash of white, or just a quick flicker? Is it accompanied by a click? There is a 1500v/.1uf cap (C621?) that goes bad and can cause an occasional click/tick sound and a jump in the picture.

-Ian
 
is there a replacement for that capacitor ?

looked for one a couple years ago and was unsuccessful in my quest

Yeah - of course. There's nothing special about it. This would work :
http://www.mouser.com/ProductDetail...EpiMZZMukHu%2bjC5l7Ya09z%2bPFYd21shOmQ2xYEJ8=

Just have to get a bit creative installing it, the leads are shorter.

This would also work, and has long leads:
http://www.mouser.com/ProductDetail...=sGAEpiMZZMtOnGahBoN8MIXX6l0Yi7SxmW9h4LNua9c=

But it's more expensive.

I'm sure there are a lot more out there, I just went to Mouser and spent 30 seconds searching. I'm sure that with a little bit of hunting you could turn up one that's cheaper and has long axial leads.

-Ian
 
Is the flash a flash of white, or just a quick flicker? Is it accompanied by a click? There is a 1500v/.1uf cap (C621?) that goes bad and can cause an occasional click/tick sound and a jump in the picture.

-Ian

rehashing ann old thread, but i finally replaced the c621 and that did the trick! By the time i got time to work on it c621 had completely given up.

Thanks a bunch!

Also replaced the R352. Looks much better now.
Thanks to all!
 
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