Display; Keyboard; Buzzer - Nokia NSE–3 SERIES Service Manual

UI Module UE4

Display

Backlighting is provided by LEDs, three LED on right and three on left
side of display. LEDs are compatible with CL270–YG and those are side
illuminating. Light is on when LIGHT–signal is in HIGH state.
Color of LED is for
Pin Line
Symbol
14 VBAT Battery voltage

Keyboard

In keyboard backlighting is made by 6 LEDs. LEDs are compatible with
CL190–YG. Backlighting is on when LIGHT–signal is on HIGH state.
Color of LED is for
– Keyboard
Pin Line
Symbol
14 VBAT Battery voltage

Buzzer

Buzzer for DCT3 generation phone is SMD type.
Typical value for node is marked with black when circuit is not active
Typical value for node is marked with gray when circuit is active
Page 4 – 12
Parameter Mini-
mum
3.0
43.4
: yellow–green, λ = 570nm
Parameter Mini-
mum
3.0
55.3
[4V]
[4V]
[0V]
Technical Documentation
Typical Maxi- Unit
/ Nomi- mum
nal
5.1 V
51.4 59.6 mA
Typical Maxi- Unit
/ Nomi- mum
nal
5.1 V
62.4 69.9 mA
[4V]
[0V]
PAMS
Notes
Same supply for
Buzzer & Keyboard
LEDs
Notes
Same supply for
Buzzer & Display
LEDs
Original 11/97