Hello
I got this unit with orange light but wont boot up
I notice that its L7560 3.3v supply is fluctuating
this is the reading I got on its PWM U7501 TPS51890A
pin 4- EN1 - 0v
pin 12 - EN - 3.3v Fluctuate
pin 21 - EN2 - 3.3v Fluctuate
pin 22 - vreg3 - 3.3v ok
pin 23 - vin - 8.62V
pin 29 - vreg5- 5v fluctuate
I already check the power rails line in page 62 but I didn't find any short on those lines. I already tried replacing the pwm but same issue.
I hope you can guide me where I can look for the fault of this unit
I got this unit with orange light but wont boot up
I notice that its L7560 3.3v supply is fluctuating
this is the reading I got on its PWM U7501 TPS51890A
pin 4- EN1 - 0v
pin 12 - EN - 3.3v Fluctuate
pin 21 - EN2 - 3.3v Fluctuate
pin 22 - vreg3 - 3.3v ok
pin 23 - vin - 8.62V
pin 29 - vreg5- 5v fluctuate
I already check the power rails line in page 62 but I didn't find any short on those lines. I already tried replacing the pwm but same issue.
I hope you can guide me where I can look for the fault of this unit
Comment