User Guide

Baseband description

System module block diagram

RM-198 has two blocks, upper block and lower block. The upper block consists of upper PWB module. The

lower block consists of Engine (BB/RF) PWB module.

The upper block is connected to the lower block (BB/RF module) via a 40-pin connector and a flex cable.

Most of the BB parts (also IHF, RF and BT) are on the topside of the Engine Module. FM parts, external audio

small components, MR sensor, upper block connector and keyboard are on the backside of the Engine Module.

Accessories and charger can be connected via the Pop-Port™ connector and the charger connector at the

bottom of the phone.

Upper PWB Module consists of two Displays, Earpiece, Camera, HWA, two DC/DC converters and one regulator

and connector to Engine Module.

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

backlight. Note also, that the RM-198 can be assembled with or without the HAC (Hearing Aid Coil).

RM-198

System Module Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 8 –5