Acer Aspire D270 dead

[corell]

Any one here have a schematic diagram for this Model? i found a open picofuse but still no power or anything. any suggestion where to check.. i'm newbie in laptop repair. thanks in advance..

[fddizon]

Re: Acer Aspire D270 dead

kabayan,

check this out...

[corell]

Re: Acer Aspire D270 dead

kabayan,

check this out...

thnks sir fddizon.. pagpalain ka kabayan

[sasser]

Re: Acer Aspire D270 dead

usually if no 19v what item is failed? mosfet or caps? and if no 3.3v what component failed then how about no 5v on motherboard?

[fddizon]

Re: Acer Aspire D270 dead

usually if no 19v what item is failed? mosfet or caps? and if no 3.3v what component failed then how about no 5v on motherboard?

if there is no 5v but have 3.3v, check output upper and lower fets and gate signals of these fets. if no signal on gate replace regulator

[corell]

Re: Acer Aspire D270 dead

Sir dizon, if UGATE is 0.2V of ISL88731C, so no gate input to AON7410.. It is considered as defective? There's a 19V in CSSN of ISL88731C..

[dycc]

Re: Acer Aspire D270 dead

Check if it turn on with battery . I got two of this model and it only power on with charged baterry . Solved issue by reflowing special area on the board(not the chipset).

[spidey]

Re: Acer Aspire D270 dead

what do you mean with "speacial area" ?

[degutji]

Re: Acer Aspire D270 dead

what do you mean with "speacial area" ?

My opinion, "special area" is a secret area that only she knew it, and did not want to share with us

[corell]

Re: Acer Aspire D270 dead

I replaced the ISL88731C and there's a output now.. but another problem occurred.. there's no 5V and 3V output in voltage controller IC RT8223M.. there's no supply to the gate of MOSFETs.. VIN of RT8223M is 3.3V.. any idea? thnks in advance..

[dycc]

Re: Acer Aspire D270 dead

hi spidey . the special area is just around rt8223.

[dycc]

Re: Acer Aspire D270 dead

corell check pr190 resistor

[corell]

Re: Acer Aspire D270 dead

corell check pr190 resistor

thnks for the reply..I already checked that sir.. 19V input of PR190.. output is 3.3V to VIN of RT8233M.. i checked the PR190 its 114 ohms.. labeled at 100 ohms.. it is ok? 19V became 3.3V after the PR190?

[dycc]

Re: Acer Aspire D270 dead

pr190=10ohms not 100ohms

ij you find 114ohms so it's dead

[dycc]

Re: Acer Aspire D270 dead

100= 10 * 10^0 = 10 *1 =10 ohms

[corell]

Re: Acer Aspire D270 dead

pr190=10ohms not 100ohms

ij you find 114ohms so it's dead

thanks for the clarification sir..

[corell]

Re: Acer Aspire D270 dead

after replacing the PR190, still no 3V and 5V output from RT8223M.. any idea? is RT8223M is defective? thnks in advance.

[whaldsz]

Re: Acer Aspire D270 dead

Please post the voltage reading of all pins of PU3 - RT8223m

[corell]

Re: Acer Aspire D270 dead

Please post the voltage reading of all pins of PU3 - RT8223m

i'll pose later.. thnks sir..

[corell]

Re: Acer Aspire D270 dead

Please post the voltage reading of all pins of PU3 - RT8223m

pin 13 - 6.21V
pin 16 - 19.14V
all remaining pin - 0V