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View Full Version : IC7 vmem, help!


DoMind
05-23-2003, 02:10 AM
Hello there :)

Me and a friend have been trying to mod this board (he's more skilled in soldering than me, but I obvious should have done it myself ;))
The R50 (0hm) came of neatly, he managed to solder a wire to the point farthest away from the winbond chip, but the point nearest the winbond chip came off the board..
Now, if you look at this picture that fugger took: http://fugger.netfirms.com/r50.jpg
We have measured 25ohms on the R50 point farthest away from the W. chip to earth.
We have measured 25ohms on the R50 point farthest away from the W. chip to the nearest point on the smd at right.
We have measured 52kohms (i think) over the nearest smd at the right.

My question is: can i solder the other wire to the 52kohm smd? (at the point nearest the W. chip?) Like this: link removed ? (the red line..)

Sorry for the bad writing.. english isn't my first language, and i'm pretty stressed right now..

I would REALLY apreciate any answers here!

DoMind
05-23-2003, 08:15 AM
Can anyone please measure the resistance between the R50 (soldering point closest to the W. chip) and the smd (soldering point closest to the W. chip) to the right?
Like this: Link removed (the green line is where I would like to know the resistance :))

Thank you in advance!

DoMind
05-23-2003, 09:00 AM
I _think_ I managed to find a very tiny piece of the R50 soldering point that was removed! But I can't solder anything to it.. too small (probably like 1/10" or 1/20 of the original..)
And I think that the R50 is in parallell with the SMD that sit's to the right (actually this is MC64, and it's a capacitor) This means that I hopefully can fix the board :D BUT, I would very much like someone to check this for me.. Don't want to burn my ram ;)

Gotta be someone her with an IC7 and a multimeter? (yeah I know, gotta give it some time..)
Hurry, hurry, hury! :P

DoMind
05-25-2003, 02:19 AM
Hipro5 helped me out here on friday, and it worked fine to solder the one end nearest the Winbond chip on to the MC64!
Currently running at 2.99V :D