Siemens C35, M35, S35 Service Manual
Information and Communication Mobile
Devices
C35(i), M35(i), S35i
Level 2.5
Repair Documentation
V 1.3
V1.3 Page 1 of 41 ICM D CC ST
D. Schnoor
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Information and Communication Mobile
Devices
Table of Contents:
1 INTRODUCTION .......................................................................................................................................... 3
2 ANTENNA CONNECTOR ........................................................................................................................... 4
3 RINGER .......................................................................................................................................................... 7
4 BOTTOM CONNECTOR (LUMBERG) ................................................................................................... 10
5 DISPLAY CONNECTOR ........................................................................................................................... 14
6 KEYBOARD LEDS ..................................................................................................................................... 18
7 DISPLAY LEDS ........................................................................................................................................... 21
8 INFRARED DIODES .................................................................................................................................. 25
9 CHARGING DIODE V210.......................................................................................................................... 29
10 DIPLEXER Z503.......................................................................................................................................... 34
11 VOLTAGE PROTECTION DIODE V279 ................................................................................................ 39
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1 Introduction
The C/M/S35 product family consists of 5 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. There also exist Asian variants of C/M/S35 named 3508 / 3518 / 3568
respectively. All information below also applies to the Asian variants unless otherwise noted.
Partnumber on IMEI label:
1) C35 / 3508: S30880-S4000-Xxxx
2) C35i / 3508i: S30880-S4050-Xxxx
Same as C35 / 3508 but with additional WAP and fax/data capabilities
3) M35 / 3518: S30880-S4200-Xxxx
4) M35i / 3518i: S30880-S4250-Xxxx
Same as M35 / 3518 but with additional WAP and fax/data capabilities
5) S35i / 3568i: S30880-S4100-Xxxx
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 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: dominik.schnoor@klf.siemens.de
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From
Power
Amplifier/
To / From
Internal
Antenna
Devices
2 Antenna Connector
2.1 Affected Units
2.1.1 Type: C/M/S35
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:
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 opened and the connection to the
external antenna socket is made. See drawing below.
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2.3 Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
2.4 Repair Documentation
2.4.1 Description of procedure:
2.4.1.1 Diagnosis
Check the output power of the handset with the LSO testprogram.
Especially watch the external antenna power!
2.4.1.2 Repair by component change
Use hot air blower to remove defective connector
Avoid excessive heat!
Watch surrounding components!
Resolder new connector afterwards.
2.4.1.3 Repair by SW-Booting
Not possible!
2.4.1.4 Test
Retest handset after repair as described above.
2.4.2 List of needed material
2.4.2.1 Components
X35 antenna connector
Attention: This is not the same connector as C25/S25 !!!
Part-Number: L36334-Z93-C272
V1.3 Page 5 of 41 ICM D CC ST
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Figure 1: X35 Board Antenna Connector Side (Top View)
Figure 2: X35 Antenna Connector Placement (X501) (Top View)
Devices
2.4.2.2 Jigs and Tools
Hot Air Blower
Soldering Iron
2.4.2.3 Special Tools
None
2.4.2.4 Working materials
Desolder Wick / Braid
Solder
2.4.3 Drawings
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3 Ringer
3.1 Affected Units
3.1.1 Type: C/M/S35
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:
Problems with the handset ringer. No ringer tone
audible.
3.2.2 Fault Symptom on GSM-Tester:
Handset fails ringer test.
3.3 Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
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3.4 Repair Documentation
3.4.1 Description of procedure:
3.4.1.1 Diagnosis
Visually check the ringer. Watch for physical damage or dry joints.
3.4.1.2 Repair by component change
Resolder dry soldering joints.
If the ringer is physically damaged use hot air blower or wick to remove
defective connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new ringer afterwards.
3.4.1.3 Repair by SW-Booting
Not possible!
3.4.1.4 Test
Retest handset after repair.
3.4.2 List of needed material
3.4.2.1 Components
Ringer P35:
Part-Number: L36178-Z2-C26
3.4.2.2 Jigs and Tools
Hot Air Blower
Soldering Iron
V1.3 Page 8 of 41 ICM D CC ST
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Figure 1: X35 Board Ringer Side
Figure 2: X35 Ringer (B800) Placement (Top View)
Devices
3.4.2.3 Special Tools
None
3.4.2.4 Working materials
Desolder Wick / Braid
Solder
Flux
3.4.3 Drawings
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4 Bottom Connector (Lumberg)
4.1 Affected Units
4.1.1 Type: C/M/S35
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:
Charging problems.
Problems with external loudspeaker or microphone
when using a car kit.
Problems with accessories connected at the bottom
connector.
Problems with SW booting.
4.2.2 Fault Symptom on GSM-Tester:
This problem cannot be detected with a GSM-Tester.
4.3 Priority:
........ Mandatory
........ Repair
........ 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 bottom connector. Watch for dry joints!
4.4.1.2 Repair by component change
Use hot air blower remove defective bottom connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new bottom connector afterwards.
4.4.1.3 Repair by SW-Booting
Not possible!
4.4.1.4 Test
Retest handset after repair.
4.4.2 List of needed material
4.4.2.1 Components
Bottom Connector X35
Part-Number: L36334-Z93-C262
4.4.2.2 Jigs and Tools
Hot Air Blower
Soldering Iron
4.4.2.3 Special Tools
None
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Figure 1: X35 Board Bottom Connector Side
Figure 2: X35 Bottom Connector Placement (Top View)
Pin 12
Pin 1
Devices
4.4.2.4 Working materials
Desolder Wick / Braid
Solder
4.4.3 Drawings
V1.3 Page 12 of 41 ICM D CC ST
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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 the
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
HF_MIC
I
External microphone
11
AUDO
O
Trigger for external
loudspeaker
12
GNDA
For external
loudspeaker
Table 1: X35 Bottom Connector Pin Description
Devices
V1.3 Page 13 of 41 ICM D CC ST
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