User Guide

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.

RM-42

BB Troubleshooting and Manual Tuning Guide Nokia Customer Care

9241872 (Issue 1) Company Confidential Page 6–27