Nokia Lumia 1320 Service Manual page 124

RM-994/ RM-995/ RM-996
System Module
Introduction ............................................................................................................................................ 127
Phone description ............................................................................................................................... 127
System module block diagram ............................................................................................................ 129
Energy management .............................................................................................................................. 130
Battery and charging .......................................................................................................................... 130
Normal and extreme voltages ............................................................................................................. 132
Power key and system power up ........................................................................................................ 133
Modes of operation ............................................................................................................................. 133
Power distribution ............................................................................................................................... 134
Clock scheme ..................................................................................................................................... 135
Micro SIM interface................................................................................................................................. 135
Device memory ....................................................................................................................................... 137
WCN3660 module ................................................................................................................................... 137
GPS interface .......................................................................................................................................... 138
MicroUSB ................................................................................................................................................ 139
MicroUSB interface and charging ....................................................................................................... 139
MicroUSB connector .......................................................................................................................... 139
User interface ......................................................................................................................................... 140
Touch module ..................................................................................................................................... 140
Proximity sensor and ambient light sensor ......................................................................................... 140
Imaging and video .............................................................................................................................. 141
Display module ......................................................................................................................... 141
Cameras ................................................................................................................................... 143
Flash (LED module) .................................................................................................................. 143
Illumination ......................................................................................................................................... 144
Keypad interface ................................................................................................................................ 145
Accelerometer .................................................................................................................................... 146
Magnetometer .................................................................................................................................... 146
Audio concept ........................................................................................................................................ 147
Audio HW architecture ........................................................................................................................ 147
Internal earpiece ................................................................................................................................. 147
Internal handsfree (IHF) speaker ........................................................................................................ 148
Internal microphones .......................................................................................................................... 148
External earpiece and microphone ..................................................................................................... 149
AHJ connector .................................................................................................................................... 149
Vibra ................................................................................................................................................... 150
Cellular RF technical description .......................................................................................................... 151
he WTR1605L transceiver unit could support GSM/EGPRS/WCDMA/HSPA+/LTE ............................. 151
Frequency mappings ............................................................................................................................. 153
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