Fm Radio; Fm Radio Interface - Siemens SXG 75 Service Repair Documentation

Hide thumbs Also See for SXG 75:

Table of Contents

7 FM Radio

The output from the Philips FM radio chip is fed into the auxiliary input of the MSM6250 audio

CODEC.

This is the routed directly to the auxiliary outputs of the MSM6250 via a built in gain stage. FM radio

can be played in stereo or mono mode, depending upon signal quality and/or user selection. FM

radio can only be played back with a stereo headset or mobile sound set connected to the

accessory connector.

This is because these are the only accessories that contain an effective FM antenna, which is

implemented using an antenna connected to MIC_GND.

In addition, the output of the FM radio can be routed to the hands-free speaker. A stereo headset is

still required to provide the antenna.

The analogue sections of the radio are powered from VREG_MSMA (2.6V). The digital interfaces

are powered from VREG_MSMP (2.6V).

Technical Documentation

TD_Repair_L3_SXG75_R1.0.pdf

Company Confidential

2006©BenQ

Release 1.0

01/2006

Page 32 of 73

Table of Contents