Re: Dell 1525 motherboard trouble need help troubleshooting
Any luck with this? i have same board with same exact problem, HELP PLZZZ
kev4eva
Member
Last Activity: 07-27-2022, 09:53 PM
Joined: 03-24-2012
Location: jamaica
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Re: Dell XPS M1530-Shorting out Adapter
here are my results:
i resodlered back u42 & desolder q6= adapter still shorts out.
still trying to find out whats causing diode u42 to short...Leave a comment:
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Re: Dell XPS M1530-Shorting out Adapter
ok thanks guys..[B].u42 reads ok out of the board[/B], trying to find out more as you saidRe: Dell XPS M1530-Shorting out Adapter
ok thanks guys..[B].u42 reads ok out of the board[/B], trying to find out more as you saidRe: Dell XPS M1530-Shorting out Adapter
ok thanks guys..[B].u42 reads ok out of the board[/B], trying to find out more as you said...Leave a comment:
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Re: Dell XPS M1530-Shorting out Adapter
i removed u42 then i see no short on adapter, i didnt turn on cause did want to damage anything.....waiting on your feedback...Leave a comment:
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Re: Dell XPS M1530-Shorting out Adapter
try to source a dc power supply dont have one, jus a meter and a smd capacitor an resistor test but had to test these caps in the board...Leave a comment:
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Re: Dell XPS M1530-Shorting out Adapter
[B]u42 pins 1,2,3 short to ground[/B].............cant test voltage as adapter keep shorting out and i dont have dc power supply
what you think, u42 short or its a cap nearly, from the schematic arent those pins positive???Re: Dell XPS M1530-Shorting out Adapter
[B]u42 pins 1,2,3 short to ground[/B].............cant test voltage as adapter keep shorting out and i dont have dc power supply
what you think, u42 short or its a cap nearly, from the schematic arent those...Leave a comment:
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Dell XPS M1530-Shorting out Adapter
Got a dell xps m1330,
Seem to be a power protection problem, cant find the source of the short.
The board is shorting out ac adapter when i try to plug in.
Tested U41 and U42 mosfets, they seem ok, C10 capacitor ok too.
Stuck on pg 38 of schematic....any help please??
See link....Will try get some pics
[URL="ftp://mirror01.x264.nl/pub/temp/uploads/ala_borbe/Dell/Dell_XPS_M1330_Thurman_UMA.pdf"]Dell Xps M1330 Intel Motherboard Schematics[/URL]Got a dell xps m1330,
Seem to be a power protectionLast edited by kev4eva; 11-21-2013, 03:51 PM. -
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...Leave a comment:
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Re: Dell Inspiron 1545 Dead-shorts out adapter
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....Leave a comment:
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Dell Inspiron 1545 Dead-shorts out adapter
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?... -
Re: Acer Aspire 5750-Dead, No Power or Lights
i wish i could do that my friend however havent purchased a dc power supply as yet am just a beginner, i appreciate your advice alot i will try retrace that circuit and also check charger IC...Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
cud PU1 IC be faulty?-i notice dc in pin24 is shorting to groundLeave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
i replaced PR22...it reads 10ohms, when i give power now it doesnt turn on an after reads 1.5 ohms
now: any 10 ohm resistor i replace at PR22 its destroyedLast edited by kev4eva; 08-19-2013, 12:02 PM.Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
will do that an post in the next few hours.....any 10 ohm black smd resistor will do with value of 100??Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
that should be PR22....has a light surface abrasin
PR22= pin 1=18.5v
pin2= 0vLast edited by kev4eva; 08-18-2013, 07:07 PM.Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
thanks i really glad your helping me so far
found pr22 its connected to positive pin of PD5, its closest to it but unlabelled on pcb
PR22= reads 18.5 volts on the one end and o volts on the other
sorry for my noob question but...whats the best range to set my meter on to measure PR22 resistance..2000 ohms??...Last edited by kev4eva; 08-18-2013, 06:35 PM.Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
thanks, suprisingly PD5 = 18.5 volts
trying to locate PR22....i see a resistor i think cud be it but got no labels will try magnify the area an locate it...Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
PQ7 seems fauly so i just replaced it...now
Pins 1-4 =18.5 volts
[B]Pins 5-8= 0.4 volts...... was 0 volts[/B] before, hmmm seems something draining current here..so turns out PQ7 not the issue??Re: Acer Aspire 5750-Dead, No Power or Lights
PQ7 seems fauly so i just replaced it...now
Pins 1-4 =18.5 volts
[B]Pins 5-8= 0.4 volts...... was 0 volts[/B] before, hmmm seems something draining current here..so turns out PQ7 not the issue??Re: Acer Aspire 5750-Dead, No Power or Lights
Last edited by kev4eva; 08-18-2013, 02:56 PM.Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
havent removed PQ7 as yet, i tried with battery in at PU1 pin 24 is 0.2volts and pins3 en is 0.3 volts
PU2 doesnt switch on as no voltages there, i will remove PQ7 shortly and update you...Last edited by kev4eva; 08-18-2013, 09:21 AM.Leave a comment:
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Re: Acer Aspire 5750-Dead, No Power or Lights
PU2- 5v and 3v regulator
0 volts on all those pins.....input an output....so i think the voltage is cut off somewhere before here whether at the second fet PQ7 ?
PQ7 -18.5 volts pins 1-4 then 0 volts on the others pins...Last edited by kev4eva; 08-18-2013, 08:13 AM.Leave a comment:
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