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Hello,
No sign of life. I see big coil diode mode value is low... Could it be anohter chip than CPU shorted ?
PPVBAT_G3H_CONN - Diode .817
PP5V_G3S - Diode .377
PVCCSA_S0_CPU Diode .012
PP3V3_S5 Diode .330
Big Coil
L7410 .003
L7420 .003
L7211 .001
L7221 .001
L7231 .001
L7330 .001
LA340 .001...
I've repalce U7700, short is gone but it doesn't start, stuck on 5 V.With USB-C tool I see 5V, 021V then 0,06 amp then shutdown and start again
with my thermal camera I see UF000 getting a little warm.
DFU not possible. Actually, I have a short on CAP_PPSPMU_VLDO9, Diode mode = 0.001. As far as I see, there's only two capacitor connetec to this line. Should I try to remove both ?
Board behavior changed while I was measuring. As soon I measure C7835 CAP_PPSPMU_VLDO9 it stops turning on and off. Board stay on betwen 0.13 and 0.30 amp. I didn' made a mistake( I was always on Volt, no diode mode), not sure why. With thermal camera I see U7700 Pulsing. It's not clear if it's...
I've compare various points (15) around UF000/100, they have similar value.
I am not sure about LDOs, I see PP1V4_LDO_PREREG at 1.39 V on L84E0/2
I see several connection for PP1V5_VLDOINT_MPMU under U8100 but i don't have a test point to measure. I've search around U8100 but i can't see other...
replaced UF000, UF100, UF400, UF500, UF115, UF40 and UF750 and all caps and resistor.
When plug USC-C power supply, I get 5V 0,2 amp for 5 seconds then it drop to 0,06 for 2 seconds amp then it stop and restart and does that over and over.
Hi,
Macbook air suden death. It was stuck at 5v -0,4 amp. I found L7800 completely burned. I removed it, now it's 5V -0,004 amp.
Now I have diode mode .464 PIN1 and .224 PIN2 where L7800 was.
Can I replace it and try to power or should I check something else ?
Thanks
Claude