sangolossyfon
Member
Board symptoms- No sign of life at all. No shorts on any 5V-3V3 S5, S3, S0 rails. No fan spin even when attempted SMC bypass. G3H voltage 13.23V. Draws about 1 watt from wall in regular or SMC bypass mode.
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820-3115-B No Power
- Thread starter sangolossyfon
- Start date
What about 3V42_G3H?
sangolossyfon
Member
it is 3.8v
Post U5010 voltages.
sangolossyfon
Member
U5010
1 PP3V42_G3H- 3.8
2 GND_SMC_AVSS- 0
3 PP3V42_G3H- 3.8
4 SMC_MANUAL_RST_L- 4.3
5 SMC_RESET_L- 3.5
6 SMC_TPAD_RST_L- 3.7
7 SMC_ONOFF_L- 3.7
8 PP3V3_S5_AVREF_SMC- 3.5
1 PP3V42_G3H- 3.8
2 GND_SMC_AVSS- 0
3 PP3V42_G3H- 3.8
4 SMC_MANUAL_RST_L- 4.3
5 SMC_RESET_L- 3.5
6 SMC_TPAD_RST_L- 3.7
7 SMC_ONOFF_L- 3.7
8 PP3V3_S5_AVREF_SMC- 3.5
Post U7200 basic voltages: pins 16, 3, 8, 17, 1, 6.
sangolossyfon
Member
in the process of measuring voltages I realized that u7200 gets very hot and board now draws 3w and doesn't have green light. I might have tapped two pins together to cause this but I will replace U7200 and update after.
edit: replaced u7200. board not booting same as before but u7200 not getting hot anymore so I assume my touching two pins shorted u7200. green light is back.
Voltages on new u7200-
16- 13.4v
3- 4.2v
8- 0.03v
17- 13.4v
1- 0.01v
6- 3.7v
edit: replaced u7200. board not booting same as before but u7200 not getting hot anymore so I assume my touching two pins shorted u7200. green light is back.
Voltages on new u7200-
16- 13.4v
3- 4.2v
8- 0.03v
17- 13.4v
1- 0.01v
6- 3.7v
"17- 13.4v"
I really doubt about this.
Be sure do not touch pins 16/17 at same time!
Check diode mode to ground at pin 8.
I really doubt about this.
Be sure do not touch pins 16/17 at same time!
Check diode mode to ground at pin 8.