Als Functionality Check - Nokia RM-596 Service Manual

RM-596
BB Troubleshooting and Manual Tuning Guide

ALS functionality check

Steps
1. Connect the phone to Phoenix and set the phone (e.g. on the table) so that the amount of ambient light
seen by ALS is as stabile as possible.
Phoenix .
2. Start
3. Choose File -> Scan product .
4. Choose Testing -> Display Test .
5. Open the Lights tab, check Ambient Light Sensor check box, click Read , cover the sensor and click
Read again. When covered, Luminance reading should be less than after clicking Read without covering
the sensor.
6. If the component does not give any reading or reading does not change when the sensor is/is not covered,
replace the part.
• After replacing the ALS, if the calibration values of the new sensor are lost or for some other reason,
ALS re-tuning is required.
• When doing the ALS calibration procedure, it is required to have a reference phone which includes a
calibrated ALS. ALS re-tuning instructions show why the reference phone is needed.
Issue 2
Figure 10 Ambient Light Sensor
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