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RM-42
BB Troubleshooting and Manual Tuning Guide
Nokia Customer Care
ALS troubleshooting
Context
If a phototransistor is broken, the display frame assy has to be replaced. The display frame assy has to be also
replaced if the calibration values are lost by some other reason (e.g. after replacing the NOR memory chip D3000).
If the phototransistor is changed, the calibration value in the phone memory has to be changed to the default
value '1'.
Make sure that you have completed
Display and keypad backlight troubleshooting (Page 6–26)
first before
starting ALS troubleshooting.
9241872 (Issue 1)
Company Confidential
Page 6–27
Copyright ©2005 Nokia. All Rights Reserved.
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