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820-2936 - Doesn't start, S0 there, ALL_SYS_PWRGD missing
- Thread starter smiba
- Start date
smiba
New member
I checked R7962 - R7967 and they're all within specification
I mesured the value on pin 1 of each resistor (R7963 to 7966) and all of them expect PVCCSA_PGOOD returned 0.049V (PVCCSA_PGOOD was at 0.011V)
So I checked the U7100 chip and PPVCCSA_S0_REG_R was at 0V, I missed it it seems!
I checked if the enable signal and it was high and it was, also all the resistors come back within specification.
Decided to swap U7100, but still the same problem.
Where would you recommend looking? At this point I think the best would be to test continuity on VCCSAS0_DRVL, VCCSAS0_LL and VCCSAS0_DRH and maybe replace Q7100?
I mesured the value on pin 1 of each resistor (R7963 to 7966) and all of them expect PVCCSA_PGOOD returned 0.049V (PVCCSA_PGOOD was at 0.011V)
So I checked the U7100 chip and PPVCCSA_S0_REG_R was at 0V, I missed it it seems!
I checked if the enable signal and it was high and it was, also all the resistors come back within specification.
Decided to swap U7100, but still the same problem.
Where would you recommend looking? At this point I think the best would be to test continuity on VCCSAS0_DRVL, VCCSAS0_LL and VCCSAS0_DRH and maybe replace Q7100?