Motorola Moto X Force Troubleshooting Manual page 71

Proximity Sensor Troubleshooting
Proximity Sensor is part U6120.
•
If reading is failing:
•
– Check black grommet in housing is not obscuring the top
of the part
– Verify voltage at C6122 is between 3.3 to 4.35 V
– Try replacing replacing the part
• If no reading at all:
Verify part orientation
–
Verify voltage at C6121 is 2.85V
–
Verify voltage at R6000 and R6001 is 1.8V
–
MOTOROLA CONFIDENTIAL
If voltage is missing try replacing U6120, U6000, or
•
U2000 in that order
Moto X Force/DROID Turbo 2
BASEBAND TROUBLESHOOTING GUIDES