Siemens Be inspired M55 Operating instructions

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M55/M56 Company Confidential
Copyright 2003© Siemens AG 05/03
M55/M56
Level 2.5
Repair Documentation
V 1.0

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M55/M56 Company Confidential
Copyright 2003© Siemens AG 05/03
Table of Content
1Introduction..................................................................................................................... 3
2I/O Connector (Slim Lumberg) ........................................................................................ 4
3Battery Connector........................................................................................................... 8
4Display Connector..........................................................................................................11
5Antenna Connector ........................................................................................................14
6Card Reader ..................................................................................................................18
7Board Connector............................................................................................................21
8Light-Night LEDS ...........................................................................................................25

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M55/M56 Company Confidential
Copyright 2003© Siemens AG 05/03
1 Introduction
M55 product is a tripleband (GSM900, GSM1800 and GSM1900) handsets and the M56 is a
dualband mobilphone (GSM850 and GSM1900).
Partnumber on IMEI label:
M55: S30880-S6300-#xxx
M56: S30880-S7600-#xxx
, while # may be any letter (A-Z) and xxx may be any number from 100, 101, 102....
This manual is intended to help you carry out repairs on level 2.5, meaning limited
component repairs. The documented failure highlights should be repaired in the local
workshops.
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.: [phone]
Fax: [phone]
e-mail: st-[email protected]

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M55/M56 Company Confidential
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2 I/O Connector (Slim Lumberg)
2.1 Affected Units
2.1.1 Type: M55/M56
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
2.2.2 Fault Symptoms on GSM Tester:
This fault cannot be detected with a GSM-Tester
2.3 Priority:
¨Mandatory
þRepair
¨Optional
¨Not Yet Defined

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M55/M56 Company Confidential
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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.
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 M55/M56
Part-Number: L36334-Z93-C303
2.4.2.2 Jigs and Tools:
Hot Air Blower
Soldering Iron

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2.4.2.3 Special tools:
None
2.4.2.4 Working materials
Desolder Wick / Braid
Solder
2.4.3 Drawings
Figure 1: M55/M56 board I/O connector
Figure 2: M55/M56 I/O connector placement (top view)

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M55/M56 Company Confidential
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Table 1: M55/M56 Bottom Connector Pin Description
Pin Name IN/OUT Notes
1 POWER I/O POWER is needed for charging
batteries and for supplying the
accessories
2 GND
3 TX_1 O Serial interface
4 RX_1 I Serial interface
5 CTS_1 I/O Data line for accessory bus
6 RTS_1 I/O Use as RTS in data operation
7 DCD_1 I/O Clock line for accessory bus
Use as DTC In data operation
8 AUDIO_P O External loudspeaker
9
10 AUDIO_N OI External loudspeaker
11 GND_MIC I External microphone
12 EPP1 O External microphone

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3 Battery Connector
3.1 Affected Units
3.1.1 Type: M55/M56
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.
3.2.2 Fault Symptoms on GSM Tester:
This fault cannot be detected with a GSM-Tester.
3.3 Priority:
¨Mandatory
þRepair
¨Optional
¨Not Yet Defined

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M55/M56 Company Confidential
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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.
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.
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 M55/M56
Part-Number: L36334-Z97-C213
3.4.2.2 Jigs and Tools:
Hot Air Blower
Soldering Iron

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3.4.2.3 Special tools:
None
3.4.2.4 Working materials
Desolder Wick / Braid
Soldering Iron
3.4.3 Drawings
Figure 1: M55/M56 board Battery connector
Figure 2: M55/M56 Battery connector placement (top view)

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4 Display Connector
4.1 Affected Units
4.1.1 Type: M55/M56
4.1.2 Affected IMEIs / Date Codes: All / All
4.1.3 Affected SW Versions: All
4.2 Fault Description
4.2.1 Fault Symptoms for customers:
Display problems, like missing lines or columns on the LCD or display contrast
problems.
4.2.2 Fault Symptoms on GSM Tester:
Display tests failed.
4.3 Priority:
¨Mandatory
þRepair
¨Optional
¨Not Yet Defined

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4.4 Repair Documentation:
4.4.1 Description of procedure:
4.4.1.1 Diagnosis:
Visually check the status of the Display connector. Watch for oxidation
4.4.1.2 Repair by component change:
Use hot air blower remove defective Display connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new Display connector afterwards.
4.4.1.3 Repair by Software booting:
Not possible!
4.4.1.4 Test:
Retest handset after repair.
4.4.2 List of needed material:
4.4.2.1 Components:
Display Connector M55/M56
Part-Number: L36334-Z97-C205
4.4.2.2 Jigs and Tools:
Hot Air Blower
Soldering Iron

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4.4.2.3 Special tools:
None
4.4.2.4 Working materials
Desolder Wick / Braid
Soldering Iron
4.4.3 Drawings
Figure 1: M55/M56 board Display connector
Figure 2: M55/M56 Display connector placement (top view)

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5 Antenna Connector
5.1 Affected Units
5.1.1 Type: M55/M56
5.1.2 Affected IMEIs / Date Codes: All / All
5.1.3 Affected SW Versions: All
5.2 Fault Description
5.2.1 Fault Symptoms for customers:
Network Search
No location update possible
5.2.2 Fault Symptoms on GSM Tester:
Output power problems on the external and internal antenna
No location update possible
5.2.3 Component Information:
The Antenna Connector is a mechanical switch operated by the RF plug of a car kit.
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 opened and
the connection to the external antenna socket is made. When the antenna connector is
blocked without RF plug the connection to the internal antenna is also opened. See drawing
below.
From Power
A
mplifier/
To Receiver
To/From
Internal
A
ntenna

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5.3 Priority:
¨Mandatory
þRepair
¨Optional
¨Not Yet Defined
5.4 Repair Documentation:
5.4.1 Description of procedure:
5.4.1.1 Diagnosis:
Check the output power of the handset with the LSO test program. Especially
watch the external antenna power!
5.4.1.2 Repair by component change:
Use hot air to remove defective antenna connector.
Avoid excessive heat!
Watch surrounding components!!
Resolder new module afterwards
5.4.1.3 Repair by Software booting:
Not possible!
5.4.1.4 Test:
Retest handset after repair.

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5.4.2 List of needed material:
5.4.2.1 Components:
Antenna Connector M55/M56
Part-Number: L36334-Z93-C272
5.4.2.2 Jigs and Tools:
Hot Air Blower
Soldering Iron
5.4.2.3 Special tools:
None
5.4.2.4 Working materials
Desolder Wick / Braid
Soldering Iron

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5.4.3 Drawings
Figure 1: M55/M56 board Antenna connector
Figure 2: M55/M56 Antenna connector placement (top view)

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6 Card Reader
6.1 Affected Units
6.1.1 Type: M55/M56
6.1.2 Affected IMEIs / Date Codes: All / All
6.1.3 Affected SW Versions: All
6.2 Fault Description
6.2.1 Fault Symptoms for customers:
Handset does not accept SIM.
6.2.2 Fault Symptoms on GSM Tester:
This fault cannot be detected with a GSM-Tester
6.3 Priority:
¨Mandatory
þRepair
¨Optional
¨Not Yet Defined

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6.4 Repair Documentation:
6.4.1 Description of procedure:
6.4.1.1 Diagnosis:
Visually check the Card Reader. Watch for dry joints:
6.4.1.2 Repair by component change:
Use soldering iron to remove defective component.
Avoid excessive heat!
Watch surrounding components!
Resolder new Card Reader afterwards.
6.4.1.3 Repair by Software booting:
Not possible!
6.4.1.4 Test:
Retest handset after repair.
6.4.2 List of needed material:
6.4.2.1 Components:
Card Reader M55/M56
Part-Number: L36334-Z93-C204
6.4.2.2 Jigs and Tools:
Hot Air Blower
Soldering Iron

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6.4.2.3 Special tools:
None
6.4.2.4 Working materials
Desolder Wick / Braid
Soldering Iron
6.4.3 Drawings
Figure 1: M55/M56 board Card Reader site
Figure 2: M55/M56 Card Reader placement (top view)