820-00923 PP1V8_UPC_XA_LDOD Reading 3.3V Instead of 1.8V

brunomotter

Member
This board came with no power. Stuck at 5V. After inspection I discovered the 2 left USB-C ports keep resetting the charger. After some measurements I found that
PP1V8_UPC_XA_LDOD is giving around 3V instead of expected 1.8V. I then replaced U3100 as it's the component that generates this voltage, but got same result. All other 3 controllers have correct 1.8V on their equivalent line. Any ideas on what could be causing this anomaly?
 

2informaticos

Administrator
Staff member
Check resistance between that LDO and any other 3V3 power rail around U3100.
Compare with another channel.
You may have leakage inside board.
 
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