Re: acer d255 la6221p completely dead



#1
got the schematic, the mobo layout

#4
charging NOT working :
PQ11 cut off
Vin1 = 0V

well, since Vin1 is 0 V, PQ11 is normally at cut off mode. No need to remove and check.

Anyway. The problem was a capacitor at +5VS

Have a nice day...

Re: acer d255 la6221p completely dead

charging NOT working :
PQ11 cut off
Vin1 = 0V

Re: acer d255 la6221p completely dead

ok, battery removed, (everything removed), stays only mobo with led pcb

power with adapter
before mosfet 19V, after mosfet 19V

=power passes thru mosfet.

***ADD : ALL leds remain OFF

Hello, there I had my d255 on a desk auto updating trhough wifi. after 0.5 - 1 hour I looked at it, the display was black. No led light up. Press on/off button : nothing. Tried many "tips" (hold switch down 10sec, 20sec, 1 min ...) nothing. I disassembled it, got the schematic, the mobo layout and tried.

connect the battery. press on/off :
no led light up
usb power turns on (@ C317).
no 5VALWP, no 3VALWP although at the moment of switch press, there is a slight (mV) change on DVM and then back to zero
switch logic working, although the "3VALW"...

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Hello from Greece. Sunny today 2021 12 02