Ambient Light Sensor Calibration; Functionality Check - Nokia MOBILE TERMINAL Service Manual

RM-356
BB Troubleshooting and Manual Tuning Guide

Ambient Light Sensor calibration

Functionality check

Steps
1. Connect the phone to
the ambient light visible to ALS is stable. The light quide of the ALS is located on the upper part of the
phone's front cover, right next to the secondary camera.
2. Scan product on Phoenix (CTRL+R)
3. Choose Testing→Display test.
4. Open the Lights tab, and check the Ambient light sensor check box. Click the Read button in order to get
the reference ambient light value. Cover the sensor and click Read again. When covered, the luminance
reading should be less than after clicking Read without covering the sensor.
5. If the component does not give any reading or the reading does not change when sensor is/is not covered,
replace the part.
Note: In RM-356 the ALS module is located on the UI flex assembly. ALS calibration must always be
done when the UI flex assembly is changed. Also, if the ALS calibration values are lost from the phone,
ALS needs to be recalibrated.
The ALS calibration procedure requires a reference phone with a calibrated ALS.
Issue 1
Phoenix , start the Phoenix software, and set the phone (e.g. on the table) so that
COMPANY CONFIDENTIAL
Copyright © 2008 Nokia. All rights reserved.
Page 3 –39