[820-00281] dead!!!! 5v@0,48

[phantom]

hi to all motherboard is perfect. no shorts around usb-controllers
i've 0V on PP1V1_UPC for each controller. (with cable connected)

how is it possible????

 

[phantom]

reProgrammed u2890, still the same

3V3_G3H 0v

on R7020 5v on all 4 pins
TBA_AUX_DET 1.2v
TBA_VDDA 4,8v
TBA_VDDP 4.8v
SMC_RESET_L 0v
BUF_SMC_RESET_L. 0v

 

[phantom]

on d6902 i've PPBUS_G3H 4,8v, on PPVIN_G3H_P3V3G3H i've 1v

 

[2informaticos]

All 4 ports have exact same current consumption nehavior?

Remove F7000/1 and check C7050 voltage.

 

[phantom]

yes all same behaviour

without both fuse i have 0v

 

[2informaticos]

Post U6903 voltages.
Check diode mode to ground at L6900.

 

[phantom]

i've resoldered a new u3200 and both fuses, now i have 1,1 on u3200 but not on u3100. still 5v @0,46

 

[phantom]

pin 1 0,3v
pin 2 1v
pin 3 0v
pin 5 0v
pin 8 0,1v
pin 9 0v
pin 10 2v

l6900 0,333 both sides

 

[phantom]

i've recheck all lines of u3200

following this guide

CD3215 Bootup Sequence - LogiWiki

We have Apple MacBook and iPhone Diode readings and general fault finding information compiled by the leaders in this area

logi.wiki

and all are ok until PM_EN_P3V3_G3H where i found 1,9v

i've also PPVIN_G3H_P3V3G3H with 1v

according to this

OpenBoardData Project

i have differents values for PM_EN_P3V3_G3H

i've 0,333 in diode mode and 3,3kohm in resistence mode (red probe on ground)

 

[2informaticos]

Check R6920 and D6902.
Change C6905/6.

 

[phantom]

r6920 has right valure

how should i check d6902?

could i simply remove c6905/06?

i really don't understand why i have 5v before the diode, and 1v after...

could i remove d6902 and do a jumper just for test?

 

[2informaticos]

Bad diode; damaged by leaky cap.
At least one of C6905/6 is bad...

 

[phantom]

.a lot of things happen...i don't remember all the things i've done...i'm sure i've changed the diode and u7000.

now it works! and boot without problem. but only without the battery. with the battery it goes to 20 but it stuck at 0,036 amp and nothing happen..

 

[2informaticos]

PPBUS_G3H and 3V3_G3H voltage with charger and battery connected?

Check resistance (ohm scale) over C7020/23.

 

[phantom]

i don't know what to think....i've disconnected and reconnected all together and it has booted with battery and has charged the battery to the max (it was at 1% with service alert). as soon as i have disconnected the cable, it has powered off. now it doesn't boot anymore with battery. i've tried with another battery, same thing


PPBUS_G3H is 11.81v

3V3_G3H is 3,41

 

[phantom]

c7020 3ohm
c7023 2,5ohm

 

[2informaticos]

It doesn't boot with both charger and battery connected?

"PPBUS_G3H is 11.81v
3V3_G3H is 3,41"
With battery alone, when doesn't boot?

 

[phantom]

it doesnt boot with battery only and with battery and charger together.

some times it boot..: i've reconnected battery and power supply and it booted again. as soon as i removed the cable, it power off. reconnected thecable-> 0,043 -.-'

 

[phantom]

i've found R6907 defective

it0s a nightmare: changed the resistence, now it doesnt boot anymore even with power supply only..

 

[phantom]

video with powersupply only

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