Moto X Force/DROID Turbo 2
BASEBAND TROUBLESHOOTING GUIDES
MOTOROLA CONFIDENTIAL
• ALS Sensor is the same part as Proximity Sensor (U6120).
• If reading is failing:
– Check black grommet in housing is not obscuring the top
of the part
– Inspect opening in lens. It should be translucent when
holding front housing up to a light. Try swapping front
housings.
– Try replacing U6120
– Test on different fixture, bulbs in fixture may be too old
and dim.
• If no reading at all (error code):
– Check part orientation of U6120
– Verify voltage at C6121 is 2.85V
– Verify voltage at R6000 and R6001 is 1.8V
• If voltage is missing try replacing U6120, U6000, or
U2000 in that order
Ambient Light Sensor (ALS) Troubleshooting
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