Nokia RM-291 Service Manual page 173

RM-291
System module
Block diagram.........................................................................................................................................................8-5
System module block diagram ........................................................................................................................8-5
Functional description ......................................................................................................................................8-6
Baseband description ............................................................................................................................................8-6
UPP .....................................................................................................................................................................8-6
UEMCLite .............................................................................................................................................................8-6
External regulators............................................................................................................................................8-6
Energy management.........................................................................................................................................8-7
Modes of operation ...........................................................................................................................................8-8
Voltage limits.....................................................................................................................................................8-8
PWB outline (baseband) ...................................................................................................................................8-9
External audio connector .................................................................................................................................8-9
External signals and connections
Interfaces .............................................................................................................................................................
External signals and connections
Analogue Signals ............................................................................................................................................
LCD interface ...................................................................................................................................................
Keyboard .........................................................................................................................................................
SIM interface ...................................................................................................................................................
Battery connector...........................................................................................................................................
Battery BL-5C...................................................................................................................................................
PWB outline (baseband)
RF description ......................................................................................................................................................
Frequency band, power and multi-slot
Transmitter - general description
Transmitter - signal processing
Receiver - general description
VCXO and PLL...................................................................................................................................................
List of Tables
Table 10 Voltage limits ..........................................................................................................................................8-8
Table 11 Connector for External Audio Accessories ............................................................................................8-9
Table 12 System connector
Table 13 System connector
Table 14 AC and DC Characteristics of RF-Base band Analogue Signals
Table 15 SIM interface.........................................................................................................................................
Table 16 Battery IF ..............................................................................................................................................
Table 17 Frequency bands and TX power class
Table 18 Multi-slot class
List of Figures
Figure 122 Module block diagram ........................................................................................................................8-5
Figure 123 Power connection diagram................................................................................................................8-7
Figure 124 SIM filtering .........................................................................................................................................8-7
Figure 125 4-pole jack plug for audio accessory.................................................................................................8-9
Figure 126 Keyboard schematics
Figure 127 Keyboard layout in UI side
Figure 128 SIM interface block diagram
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