mbcontrol
Member
I'm working on a 820-00840-A that had a lot of water damage. Description from customer "no more reaction. Water damage - the device was for a short time submerged in water".
After fixing all the damaged areas finally PP3V3_S0 was missing. I changed U7650 to fix this.
The board have 20V and uses at the beginning ca. 485mA, going up to ca. 600mA when the cpu-temperature get's up. The CPU gets warm, up to 55°C (needs ca. 1-2 minutes) measured on top of the cpu-cooler.
The board does not boot - chipmunk don't show any cpu-activity. Pushing SMC_ONOFF_R_L shows no reaction, it's not possible to shut down the board by pushing it 5 seconds or more.
Here are my measurements:
PPBUS_G3H = 13,05V
PPDCIN_G3H = 20,41V
PP5V_S5 = 5,11V
PP3V3_G3H = 3,41V
PP3V3_S4 = 3,32V
PP3V3_S0 = 3,31V
PP1V8_S3 = 1,80V
PP1V2_S3 = 1,20V
PPVTT_S0 = 0,60V
PP0V6_S3_MEM_VREFDQ_A = 0,61V
PP0V6_S3_MEM_VREFCA_A = 0,60V
PP0V6_S3_MEM_VREFDQ_B = 0,60V
PPVCCSA_S0G = 0,77V
PPVCCCPU_S0G = 0,79V
PPVCCGT_S0G = 0,67V
PP1V2_S3 = 1,20V
PPVCCIO_S0G = 0,96V
PP1V_S3 = 0,99V
PP1V_S0G = 0,99V
PP1V2_S0G = 1,20V
PP3V1_RTC = 3,09V
PP3V3_S5 = 3,32V
PP3V3_S5G = 3,32V
PP1V_S5G = 1,00V
PP1V8_S5G = 1,80V
PPVCCPCH_S5G = 1,00V
PP1V_S5GTD = 0,98V
PP1V8_S0 = 1,80V
PP3V3_S0 = 3,31V
PP3V3_S4 = 3,32V
PP3V3_S5_SSD_SNS = 3,32V
PP3V3_TBT_X_S0 = 3,31V
PU_VSNS_CPU_VCCGTX_TP = 0,64V
PD_VSNS_CPU_VCCGTX_TN = 0,02V
ALL_SYS_PWRGD = 3,21V
SMC_PM_G2_EN = 3,41V
PP3V3_LDO3V = 3,29V
P3V3S5_EN = 3,41V
PM_EN_P3V3S5 = 3,41V
PM_EN_P3V3S5G = 3,21V
PM_EN_PVXS5 = 3,41V
PM_EN_P5VS5 = 3,41V
PM_EN_P3V3S5 = 3,41V
(L7670) PP5VS4 = 5,11V
SMC_ONOFF_L = 3,40V
PM_SLP_S4_L = 3,32V
S5_PWRGD = 3,29V
PM_DSW_PWRGD = 3,41V
PP1V_OPC_S0 = 1,05V
PPVCCGT_S0G_PH3 = 0,65V
PPVCCGT_S0G_PH1 = 0,64V
PPVCCGT_S0G_PH2 = 0,64V
PPVCCCPU_S0G_PH1 = 0,78V
PPVCCCPU_S0G_PH2 = 0,77V
PPVCCSA_S0G_R = 0,74V
PP1V_S5G_REG = 1,00V
PPVCCPCH_S5G = 1,00V
PP1V2_S3_REG = 1,20V
PPVCCIO_S0G = 0,95V
Maybe the picture of the thermal cam helps ...
After fixing all the damaged areas finally PP3V3_S0 was missing. I changed U7650 to fix this.
The board have 20V and uses at the beginning ca. 485mA, going up to ca. 600mA when the cpu-temperature get's up. The CPU gets warm, up to 55°C (needs ca. 1-2 minutes) measured on top of the cpu-cooler.
The board does not boot - chipmunk don't show any cpu-activity. Pushing SMC_ONOFF_R_L shows no reaction, it's not possible to shut down the board by pushing it 5 seconds or more.
Here are my measurements:
PPBUS_G3H = 13,05V
PPDCIN_G3H = 20,41V
PP5V_S5 = 5,11V
PP3V3_G3H = 3,41V
PP3V3_S4 = 3,32V
PP3V3_S0 = 3,31V
PP1V8_S3 = 1,80V
PP1V2_S3 = 1,20V
PPVTT_S0 = 0,60V
PP0V6_S3_MEM_VREFDQ_A = 0,61V
PP0V6_S3_MEM_VREFCA_A = 0,60V
PP0V6_S3_MEM_VREFDQ_B = 0,60V
PPVCCSA_S0G = 0,77V
PPVCCCPU_S0G = 0,79V
PPVCCGT_S0G = 0,67V
PP1V2_S3 = 1,20V
PPVCCIO_S0G = 0,96V
PP1V_S3 = 0,99V
PP1V_S0G = 0,99V
PP1V2_S0G = 1,20V
PP3V1_RTC = 3,09V
PP3V3_S5 = 3,32V
PP3V3_S5G = 3,32V
PP1V_S5G = 1,00V
PP1V8_S5G = 1,80V
PPVCCPCH_S5G = 1,00V
PP1V_S5GTD = 0,98V
PP1V8_S0 = 1,80V
PP3V3_S0 = 3,31V
PP3V3_S4 = 3,32V
PP3V3_S5_SSD_SNS = 3,32V
PP3V3_TBT_X_S0 = 3,31V
PU_VSNS_CPU_VCCGTX_TP = 0,64V
PD_VSNS_CPU_VCCGTX_TN = 0,02V
ALL_SYS_PWRGD = 3,21V
SMC_PM_G2_EN = 3,41V
PP3V3_LDO3V = 3,29V
P3V3S5_EN = 3,41V
PM_EN_P3V3S5 = 3,41V
PM_EN_P3V3S5G = 3,21V
PM_EN_PVXS5 = 3,41V
PM_EN_P5VS5 = 3,41V
PM_EN_P3V3S5 = 3,41V
(L7670) PP5VS4 = 5,11V
SMC_ONOFF_L = 3,40V
PM_SLP_S4_L = 3,32V
S5_PWRGD = 3,29V
PM_DSW_PWRGD = 3,41V
PP1V_OPC_S0 = 1,05V
PPVCCGT_S0G_PH3 = 0,65V
PPVCCGT_S0G_PH1 = 0,64V
PPVCCGT_S0G_PH2 = 0,64V
PPVCCCPU_S0G_PH1 = 0,78V
PPVCCCPU_S0G_PH2 = 0,77V
PPVCCSA_S0G_R = 0,74V
PP1V_S5G_REG = 1,00V
PPVCCPCH_S5G = 1,00V
PP1V2_S3_REG = 1,20V
PPVCCIO_S0G = 0,95V
Maybe the picture of the thermal cam helps ...
