Antenna Switch (Electrical/Mechanical) - Siemens A70 Service Repair Documentation

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Copyright 2005© Siemens AG

6.7 Antenna switch (electrical/mechanical)

Internal/External <> Receiver/Transmitter
The A70 mobile have two antenna switches.
a) The mechanical antenna switch for the differentiation between the internal and
external antenna which is used only for RF adjustments on the board.
b) The electrical antenna switch, for the differentiation between the receiving and
transmitting signals.
To activate the correct tx pathes of this diplexer, the EGOLDlite signals
and RF_FE_DTR_DCS
Internal/External antenna switch
to / from diplexer
The electrical antenna switch
Top View :
TD_Repair_L2.5_A70_A75_R1.0.pdf
are required.
to EGOLD
From/to Antenna
from PA
from EGOLD
Page
s Com
External
of
19 53
RF_FE_DTR_GSM
Internal
to Bright
Release 1.0