Illumination - Nokia RM-596 Service Manual

RM-596
System Module
Figure 60 Secondary camera interface
Flash (Xenon)
The Xenon flash module consists of a flash lamp, capacitor bank and a LED. The flash lamp is used for flash
and pre-flash operations. The capacitor is used to store the electrical energy for discharge of the flash lamp.
Xenon flash is controlled from BCM2727B via AS3685A flash driver which is used to drive the LED in the flash
module for auto focus and indication operations. The driver has GPIO control for STROBE, ENABLE and auto
focus assist.

Illumination

Key illumination
Only MENU or HOME key illumination is supported and is handled by RGB 3 channel LED driver NJOY-3. 2 white
LEDS, V2420 and V2422, are used for MENU key illumination. These LEDs are connected in parallel to R output
of NJOY-3 LED driver.
Charging illumination
2 white LEDs are used for charging indication.
One white LED (V2410) is connected to EM ASIC "ChInd" pin and blinks only during dead battery USB charging
in intervals of 1.5s. This LED is OFF during Dynamo dead battery charging and when the charging is taking
place under SW control.
The second white LED (V2411) is connected to B output of NJOY-3 LED driver and glows for indicating USB or
Dynamo charging controlled by SW. This LED is OFF during dead battery Dynamo and USB charging. Neither
LED V2410 nor V2411 glows during Dynamo dead battery charging case.
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