820-3437 u8080

Rford

New member
Found U8080 to be shorted on this 3437. Changed it, and now on pin 7 (P5VS0_FET_RAMP) its reading 2.45v... is this typical of this circuit? It looks like there is cap 8081 in line, but this reading seems off. Any insight? (Liquid damaged board) This board isnt powering on, and I am in the process of diagnosis.
 

jgraffis

New member
need the basics. do you have a green/red light on the charger? you should be getting 5v on pin 5 but only if you are getting 5v on pin 1 and 2 of u8080. what pin was shorted to ground on u8080?
 

Rford

New member
Yes green light on charger, 0 at pin 5
3.3 at the EN pin
I think it was an internal short as the component got hot as hell and burned me.
 

Rford

New member
I have voltage on pins 1, 2, 3 but no voltage at 6 or 7. Same scenario, I change it out, and it gets broiling hot. checked the legs, and no short to ground. I highly doubt its the actual component as I have tried a couple different ones.
 
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