User Guide

Nokia Customer Care System Module
Company Confidential RH-21
Issue 2 07/2004  2004 Nokia Corporation. Page 19
System Connector Lines
HF and HFCM lines have spark gaps, and a ferrite bead RF filter (450 W/100 MHz).
Headint and Hookint have spark gaps as well as an RC-circuit.
Charger + is protected with a ferrite bead (42 W/100 MHz) and capacitor to ground (1 n).
Charger - is protected with a ferrite bead (42 W/100 MHz).
Battery Connector Lines
BSI and BTEMP lines are protected with spark gaps and RC-circuit where resistors are
size 0402.
M-bus F-bus
The FBus and MBus lines are protected with spark gaps and resistors.
Tranceiver Interfaces
BB - RF Interface Connections
All the signal descriptions and properties in the following tables are valid only for active
System Connector signals that have EMC protection
Protection
type
VIN XMIXP XMICN XEARP XEARN HEAD-
INT
MICP
ferrite bead
(600 /
199MHz)
XXXX X
ferrite bead
(420 /
100MHz)
X
spark gaps XXXXXX
PWB capaci-
tors
XXXXXX
RC-circuit XXXXX
capacitor to
ground
XXXXX