Display And Keyboard Backlight Troubleshooting; Als Troubleshooting - Nokia n80 User Manual
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Also See for n80:
- User manual (142 pages) ,
- Manual (128 pages) ,
- Aplicaciones adicionales manual (33 pages)
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RM-91; RM-92
BB Troubleshooting and Manual Tuning Guide
Nokia Customer Care
Display and keyboard backlight troubleshooting
Context
The device has one LED driver that provides current for both display and keyboard 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.
Troubleshooting flow
ALS troubleshooting
Context
• If a phototransistor is broken, replace it with a typical phototransistor.
• If the phototransistor is changed, the calibration value in the phone memory has to be changed to the
default value '1'.
Issue 1
COMPANY CONFIDENTIAL
Page 6 –47
Copyright © 2006 Nokia. All rights reserved.
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Table of Contents
Troubleshooting
