Hermann Neupert
Member
Hi,
Board is water damage, most corrosion was in the little caps around the XA/XB USB port connector. Also C3101 was looking nasty, I replace the caps, no shorts detected, just ugly caps.
When I plug the original charger with an amp meter I get steady 5.11V in XA port. XB port pulses 5 seconds in 5.11V then goes to 0V for 1 second and up to 5.11V. Ports on the other side do the same.
I replace U3100, but keeps doing the same.
PP3V3_G3H = 3.39V
PP3V3_UPC_XA_LDO 3.36V
PP20V_USBC_XA_VBUS= 5.11V
PPDCIN_G3H = 5.12V
UPC_XA_GATE1 = 11.01V
UPC_XA_GATE2 = 7.18V
PP1V8_UPC_XA_LDOA = 1.77V
PP1V8_UPC_XA_LDOD = 1.79V
pp1V1_UPC_XA_LDO_BMC =1.11V
Should I replace U3100 again or look for something else?
Board is water damage, most corrosion was in the little caps around the XA/XB USB port connector. Also C3101 was looking nasty, I replace the caps, no shorts detected, just ugly caps.
When I plug the original charger with an amp meter I get steady 5.11V in XA port. XB port pulses 5 seconds in 5.11V then goes to 0V for 1 second and up to 5.11V. Ports on the other side do the same.
I replace U3100, but keeps doing the same.
PP3V3_G3H = 3.39V
PP3V3_UPC_XA_LDO 3.36V
PP20V_USBC_XA_VBUS= 5.11V
PPDCIN_G3H = 5.12V
UPC_XA_GATE1 = 11.01V
UPC_XA_GATE2 = 7.18V
PP1V8_UPC_XA_LDOA = 1.77V
PP1V8_UPC_XA_LDOD = 1.79V
pp1V1_UPC_XA_LDO_BMC =1.11V
Should I replace U3100 again or look for something else?
