Ambient Light Detector - Nokia NHL-2NA Series Troubleshooting Instructions

CCS Technical Documentation

Ambient Light Detector

From now on the Ambient Light Detector will be referred to as ALD.
Main components of the ALD are phototransistor SFH3410 (V130, 4864901), pull-up
resistor 22kΩ (R131) and UEM (D190) ADC. There is also an NTC-resistor 47kΩ (R132,
1820037), which is used for temperature compensation. Temperature compensation is
done by SW.
Issue 1 07/02
Figure 10: Ambient Light Sensor components
V130
(collector)
V130
(emitter)
¤Nokia Corporation
R132
R131
NHL-2NA
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