User Guide

NSM–3/3D
UI Module
PAMS Technical Documentation
Page 12
Issue 3 11/2000
 Nokia Mobile Phones Ltd.
Power Key
Micro switch is used as a power key on UI module. Circuitry includes mi-
cro switch and two diodes which is needed for MAD interface. Power key
is connected to CCONT. Power switch is active in LOW state. Power key
is connected to ROW4.
Backlighting
Switching circuits for backlighting are placed on UI module. Display and
keyboard lighting is connected together. When LIGHT–signal is HIGH the
lights are on and when LIGHT–signal is LOW state lights are off.
*not assembled
in NSM–3D.
*
*
NSM–3
Backlighting is made by LEDs, three LEDs on right and three on left side
of display. LEDs are compatible with CL270–YG and those are side illumi-
nating. Light is on when LIGHT–signal is in HIGH state.
In keyboard backlighting is made by 6 LEDs. LEDs are compatible with
CL190–YG. Backlighting is on when LIGHT–signal is on HIGH state.
NSM–3D
Backlighting is made by LEDs, two LEDs on right and two on left side of
display. LEDs are compatible with CL270–HB and those are side illumi-
nating. Light is on when LIGHT–signal is in HIGH state.
In keyboard backlighting is made by 6 LEDs. LEDs are compatible with
CL191–B1. Backlighting is on when LIGHT–signal is on HIGH state.