Re-Tuning Als - Nokia N900 Service Manual

RX-51
BB Troubleshooting
6. If component doesn't give any reading or reading doesn't change when sensor is/is not covered, replace
the part.
Note: After replacing the ALS. If calibration values of the new sensor are lost or for some other
reason, ALS re-tuning is required (see instructions later in this document).
When doing the ALS calibration procedure, it is required to have a reference phone, which includes
calibrated ALS. ALS re-tuning instructions show why the reference phone is needed.

Re-tuning ALS

Steps
1. Connect reference phone to Phoenix and set the phone (e.g. on the table) so that the amount of ambient
light seen by ALS is as stable as possible.
2. Start Phoenix.
3. Choose File→Scan Product.
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