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Name of Connection
ALS
Vibra
Microphone
Earpiece
IHF speaker
UI module connector and IF connections
Pin
1
GND
2
LED+
3
Col2
4
LED-
5
Col1
6
GND
7
Row3
8
Row2
Page 9–38
Connector reference
V4400
M2100
B2100
B2101
B2102
Figure 124 UI connector
Table 23 User interface connections
Signal
I/O
<-
->
->
->
->
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Notes
Ambient Light Sensor
Engine connection
GND
N2301
VLEDOUT2
Helen3
Kbc_2
R2305 + V2300
SETCURR2
Helen3
Kbc_1
GND
Helen3
Kbr_3
Helen3
Kbr_2
RM-36
System Module
Notes
Discrete
Backlight SMPS
(controlled by
Tahvo)
Serial resistor +
Transistor
switch
(controlled by
Tahvo)
Voice switch
connection
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