Dell Inspiron 1545 Dead-shorts out adapter

[kev4eva]

Got a situation here, dell inspiron 1545, shorts out ac adapter. Power
board diode is ok; (verified) tried another power board same result.

I think there is a short somewhere in U47 or U47. Cant measure voltages as once ac adapter is connected the board shorts out.Am i on the right track?? Any guides? Will take sum pics later. Attached my schematic.

U47 =525ohms in one direction A04407A
636ohms in other direction

U46=528 ohms in one direction
1ohm in reverse


is U47 open/shorted?

[crazypepe]

Re: Dell Inspiron 1545 Dead-shorts out adapter

try testing both out of circuit
see if it switches on/off

[kev4eva]

Re: Dell Inspiron 1545 Dead-shorts out adapter

try testing both out of circuit
see if it switches on/off

thanks but....

u47- A04407A-GP

that diode seems open, when removed from circuit and power put to motherboard there is no short circuit (light on charger stays on) ....trying to find a suitable replacement....i had found one before and tried but somehow when i soldered it back i had the same short so looking for the exact replacement.

[dj_ricoh]

Re: Dell Inspiron 1545 Dead-shorts out adapter

i got the same notebook on my table jesus.
i got short that its killing the adapter.
i`ll open tomorrow and find that u47 pfff

[kev4eva]

Re: Dell Inspiron 1545 Dead-shorts out adapter

OK I SEE..WELL i replaced u47 and now no short of charger(stays lit) however now not turning on sigh...

[gabesz84]

Re: Dell Inspiron 1545 Dead-shorts out adapter

I know it was 8 years ago... but, did you solve the problem?