Display And Keyboard Backlight Troubleshooting - Nokia RM-313 Service Manual

RM-313
BB Troubleshooting and Tuning Guide

Display and keyboard backlight troubleshooting

Context
The device has one LED driver that provides current for both display and keyboard backlights and another
LED driver that provides current for ITU and side key backlights.
Keyboard backlights are turned ON only in dark conditions. This is controlled by the Ambient Light Sensor
(ALS). Also the brightness of the display is adjusted by the ambient light sensor.
You can enable/disable ALS with the help of Phoenix service software.
Display brightness can be adjusted manually, if ALS is disabled. If the ambient light sensor is enabled, it
adjusts the display brightness automatically.
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