Siemens C25 Service Manual

Information and Communication Products
Communication Devices
V1.2 Page 4 of 34 ICP CD ST
D. Schnoor
8/99
2 Antenna Connector
2.1 Affected Units
2.1.1 Type: C25
2.1.2 Affected IMEIs / Date Codes: All / All
2.1.3 Affected SW-Versions: All
2.1.4 Fault Code for LSO reporting: 3ANC
2.2 Fault Description
2.2.1 Fault Symptoms for customers:
Network Search when using the external antenna
(carkit)
No location update possible on external antenna (carkit)
2.2.2 Fault Symptom on GSM-Tester:
Output power problems on the external antenna
No location update possible
2.2.3 Component Information
The Antenna Connector is a mechanical switch operated by the RF plug of a carkit or, for testing
purposes, of an RF clip.
Normally the RF signal goes to and comes from the internal antenna. Whenever an RF plug is plugged
into the antenna connector the connection to the internal antenna is openend and the connection to the
external antenna socket is made. See drawing below.

Siemens C25 Specifications

General

Announced	1999
Display Type	Monochrome graphic
Talk Time	Up to 4 h
SIM	Mini-SIM
Call Records	10 dialed, 10 received, 10 missed calls
Loudspeaker	No
3.5mm Jack	No
Messaging	SMS
Clock	Yes
Alarm	Yes
Games	Yes
Languages	Multiple
Network	GSM
Weight	135 g
Battery Type	Removable NiMH battery
Alert Types	Monophonic ringtones