Nokia RM-164, Руководство по обслуживанию

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Display and display backlight
The main display includes four white LEDs for display backlights inside of the display module. Display
backlight current is monitored using LED driver feedback input.
Keyboard and keyboard backlight
Numeric keys, power and volume up/down keys are placed on the flexible PWB.
GENIO 38 42 39 40 41 GND
COL0 COL1 COL2 COL3 COL4
32 ROW0 Up Select Left Right
33 ROW1 Soft Left Send Down Soft Right
34 ROW2 Volume
Up
1 4 7 *
35 ROW3 Volume
Down
2 5 8 0
36 ROW4 3 6 9 #
PWRONX END
There are six white LEDs placed on the keyboard PWB for illumination of the keyboard. Supply source for the
display and directional key backlights is implemented using an external white LED driver. The driver increases
battery voltage up to 13V. The numeric keypad LEDs are powered by a separate current source LED driver.
Slide switch
The detection of the position of the slide is made through a MR sensor and a magnet. The magnet is internal
to the IHF speaker.
When the slide fold is opened, the applied magnetic field is high. This is sensed by the MR Sensor.
RM-164
System module
Issue 1 COMPANY CONFIDENTIAL Page 5 –17
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