Siemens A50, C45, M50, MT50 Service Manual
Information and Communication Mobile
V 1.1
Page 1 of 27
ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
Mobile Phones
C45/M50/MT50/A50
Level 2.5
Repair Documentation
V 1.1
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V 1.1
Page 2 of 27
ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
Mobile Phones
Table of Content
1 Introduction ..................................................................................................................... 3
2 I/O Connector (Lumberg) ................................................................................................ 4
3 Battery Connector ........................................................................................................... 8
4 Display Connector ..........................................................................................................11
5 Antenna Connector ........................................................................................................14
6 Card Reader ..................................................................................................................18
7 Keypad LEDs .................................................................................................................21
8 Display LEDs .................................................................................................................24
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ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
Mobile Phones
1 Introduction
C45/M50/MT50/A50 product family consists of 6 different dualband handsets (GSM-900 and
GSM-1800), which can easily be distinguished from the second block of the partnumber
printed on the IMEI label.
Partnumber on IMEI label:
1) C45: S30880-S5100-#xxx
, while # may be any letter (A-Z) and xxx may be any number from 100, 101, 102....
2) 2118: S30880-S5100-#xxx (China Version C45)
, while # may be any letter (A-Z) and xxx may be any number from 800, 801, 802....
3) M50 S30880-S5150-#xxx
, while # may be any letter (A-Z) and xxx may be any number from 100, 101, 1 02....
4) MT50 S30880-S5120-#xxx
, while # may be any letter (A-Z) and xxx may be any number from 100, 101, 1 02....
5) 3118: S30880-S5150-#xxx (China Version M50)
, while # may be any letter (A-Z) and xxx may be any number from 800, 801, 802....
6) A50: S30880-S5110-#xxx
, while # may be any letter (A-Z) and xxx may be any number from 800, 801, 802....
This manual is intended to help you carry out repairs on level 2.5, meaning limited
component repairs. Failure highlights are documented and should be repaired in the local
workshops.
It must be noted that all repairs have to be carried out in an environment set up according to
the ESD (Electrostatic Discharge Sensitive Devices) regulations defined in international
standards.
If you have any questions regarding the repair procedures or technical questions about the
spare parts do not hesitate to contact our technical support team in Kamp-Lintfort, Germany:
Tel.: +49 2842 95 4666
Fax: +49 2842 95 4302
e-mail: st-support@klf.siemens.de
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ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
2 I/O Connector (Lumberg)
2.1 Affected Units
2.1.1 Type: C45/M50/MT50/A50
2.1.2 Affected IMEIs / Date Codes: All / All
2.1.3 Affected SW Versions: All
2.2 Fault Description
2.2.1 Fault Symptoms for customers:
- Charging problems.
- Problems with external loudspeaker or microphone
when using a car kit.
- Problems with accessories connected at the I/O -
connector.
- Problems with SW booting
Mobile Phones
2.2.2 Fault Symptoms on GSM Tester:
This fault cannot be detected with a GSM-Tester
2.3 Priority:
Mandatory
Repair
Optional
Not Yet Defined
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ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
2.4 Repair Documentation:
2.4.1 Description of procedure:
2.4.1.1 Diagnosis:
Visually check the bottom connector. Watch for dry joints:
2.4.1.2 Repair by component change:
Use hot air blower remove defective I/O connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new I/O connector afterwards.
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2.4.1.3 Repair by Software booting:
Not possible!
2.4.1.4 Test:
Retest handset after repair.
2.4.2 List of needed material:
2.4.2.1 Components:
I/O Connector C45/M50/MT50/A50
Part-Number: L36334-Z93-C262
2.4.2.2 Jigs and Tools:
Hot Air Blower
Soldering Iron
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ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
2.4.2.3 Special tools:
None
2.4.2.4 Working materials
Desolder Wick / Braid
Solder
2.4.3 Drawings
Figure 1: C45/M50/MT50/A50 board I/O connector
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Mobile Phones
Figure 2: C45/M50/MT50/A50 I/O connector placement (top view)
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Page 7 of 27
ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
Pin
Name
IN/OUT
Notes
1
GND
2
SB
I/O
Charger coding and charger control.
3
POWER
I
Charging Current
4
FBatt+
O
Power supply for accessories.
5
TX O Serial interface
6
RX I Serial interface
7
ZUB_CLK
I/O
Clock line for accessory bus
Use as DTC In data operation
8
ZUB_DATA
I/O
Data line for accessory bus.
Use as CTS in data operation
9
GND_MIC
For external microphone
10
MICP2
I
External microphone
11
EPP2
O External loudspeaker
12
EPP1
O External loudspeaker
Table 1: C45/M50/MT50/A50 Bottom Connector Pin Description
Mobile Phones
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Page 8 of 27
ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
3 Battery Connector
3.1 Affected Units
3.1.1 Type: C45/M50/MT50/A50
3.1.2 Affected IMEIs / Date Codes: All / All
3.1.3 Affected SW Versions: All
3.2 Fault Description
3.2.1 Fault Symptoms for customers:
Mobile does not switch on.
Error message “WRONG BATTERY” on display.
Mobile Phones
3.2.2 Fault Symptoms on GSM Tester:
This fault cannot be detected with a GSM-Tester.
3.3 Priority:
Mandatory
Repair
Optional
Not Yet Defined
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ICM MP CCQ S T
C45/M50/MT50/A50
Company Confidential
Copyright 2002© Siemens AG
02/08
3.4 Repair Documentation:
3.4.1 Description of procedure:
3.4.1.1 Diagnosis:
Visually check the status of the Battery connector. Watch for
oxidation and dry solder joints.
Mechanically check the opening / closing mechanism.
3.4.1.2 Repair by component change:
Use hot air blower remove defective Battery connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new Battery connector afterwards.
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3.4.1.3 Repair by Software booting:
Not possible!
3.4.1.4 Test:
Retest handset after repair.
3.4.2 List of needed material:
3.4.2.1 Components:
Battery Connector C45/M50/MT50/A50
Part-Number: L36158-A54-C215
3.4.2.2 Jigs and Tools:
Hot Air Blower
Soldering Iron
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