User Guide

Baseband description

System module block diagram

RM-86 Transceiver is a monoblock phone consisting of Engine PWB, UI PWB and side key flex. Engine PWB

consists of BB and RF modules. UI PWB consists of keyboard and illumination LEDs. Side key flex consists of

PWR-key, side keys and two flashlight LEDs.

UI PWB is connected to the Engine PWB via 16-pin Board to Board connector. Side key flex is connected to

Engine PWB via 12-pin Board to Board connector. GSM and BT antenna are connected to the Engine PWB via

pogo pins.

RF, Baseband digital parts (processor & memory) and camera HWA are on the bottom side of the Engine PWB.

EM ASICs, Bluetooth, FM Radio and 3D accelerometer are located on the top side. Accessories and charger can

be connected via the Pop-Port connector and the charger connector. Display is connected to the top side of

the Engine PWB.

Note: In this description, user interface HW (UI HW) covers accelerometer, display, camera, keyboard

and keyboard backlight.

Figure 68 System level block diagram

Baseband functional description

Digital baseband consists of ISA based modem and application sections. Modem functionality is in RAPGSM

ASIC.

RM-86

System Module Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 9 –5