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820-00239 was working perfectly til i dropped a screw inside

PCTRONICS

PCTRONICS

New member
FML this one i screwed up, lucky it was mine. i was taking diode measurements because it was a known working machine. dammit! dropped a small screw on the board and i heared a little electrical fart. pft it went but i cannot see what i messed up. here is some basic info. this was a perfect working board till i fucked it.

board is taking 5.17v @ 0.020A PPBUS_G3h 0.075v PPDCIN is 5.17v i changed the ISL and no improvment. if you could help me on where to start that would be great. i was actually troubleshooting another board when this happened. im such an IDIOT!

PPBUS g3H has a 0.373V drop to ground.
 
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KC Micro Tronix

KC Micro Tronix

Member
I sure feel for you.
I am a little green on this model. Have one in the drawer and have only worked on a few of these so far.

Seems to me your PPBUS_G3H is either shorted or the fuse is gone or both.

What is resistance to ground on PPBUS_G3H?
Did you check F7000
 
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2informaticos

2informaticos

Administrator
Staff member
"PPBUS g3H has a 0.373V drop to ground."
Is that diode mode reading?
In such case, no short there.
Specify what you do correctly...

Do you get 3V3_G3H?
Also check SMC_RESET_L.
 
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