Backlights And Led Driver Troubleshooting - Nokia MOBILE TERMINAL Service Manual

RM-356
BB Troubleshooting and Manual Tuning Guide
Troubleshooting flow

Backlights and LED driver troubleshooting

Context
The device has one LED driver that provides current for both the display and keyboard backlights. Brightness
can be adjusted manually, and it affects both the display and keypad. Keyboard backlights can be turned ON/
OFF separately but not without switching on the display lights.
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