Siemens A35, A36 Service Manual
Information and Communication Mobile
Devices
A35, A36
Level 2.5
Repair Documentation
V 1.0
V1.1 Page 1 of 31 ICM D CC ST
D. Schnoor
07/01
Information and Communication Mobile
Devices
Table of Contents:
1 INTRODUCTION .......................................................................................................................................... 3
2 BOTTOM CONNECTOR (LUMBERG) ..................................................................................................... 4
3 DISPLAY CONNECTOR ............................................................................................................................. 8
4 KEYBOARD LEDS ..................................................................................................................................... 12
5 DISPLAY LEDS ........................................................................................................................................... 15
6 CHARGING DIODE V201.......................................................................................................................... 18
7 BUFFER CAPACITOR C162 ..................................................................................................................... 23
8 DIPLEXER Z503 .......................................................................................................................................... 27
V1.1 Page 2 of 31 ICM D CC ST
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1 Introduction
A35/A36 product family, also referred to as A3x, consists of 2 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 is also an Asian variant of A35 named 1118. All
information below also applies to the Asian variant unless otherwise noted.
Partnumber on IMEI label:
1) A35/1118: S30880-S4350-Xxxx
2) A36: S30880-S4300-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.
V1.1 Page 3 of 31 ICM D CC ST
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2 Bottom Connector (Lumberg)
2.1 Affected Units
2.1.1 Type: A35/A36/1188
2.1.2 Affected IMEIs / Date Codes: All / All
2.1.3 Affected SW-Versions: All
2.1.4 Fault Code for LSO reporting: 3LUC
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 bottom
connector.
Problems with SW booting.
2.2.2 Fault Symptom on GSM-Tester:
This problem cannot be detected with a GSM-Tester.
2.3 Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
V1.1 Page 4 of 31 ICM D CC ST
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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 bottom connector.
Avoid excessive heat!
Watch surrounding components!
Resolder new bottom connector afterwards.
2.4.1.3 Repair by SW-Booting
Not possible!
2.4.1.4 Test
Retest handset after repair.
2.4.2 List of needed material
2.4.2.1 Components
Bottom Connector A35/A36/1188
Part-Number: L36334-Z93-C262
2.4.2.2 Jigs and Tools
Hot Air Blower
Soldering Iron
2.4.2.3 Special Tools
None
V1.1 Page 5 of 31 ICM D CC ST
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Figure 1: A3x Board Bottom Connector Side
Figure 2: X35 Bottom Connector Placement (Top View)
Pin 12
Pin 1
Devices
2.4.2.4 Working materials
Desolder Wick / Braid
Solder
2.4.3 Drawings
V1.1 Page 6 of 31 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
V1.1 Page 7 of 31 ICM D CC ST
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3 Display Connector
3.1 Affected Units
3.1.1 Type: A35/A36/1188
3.1.2 Affected IMEIs / Date Codes: All / All
3.1.3 Affected SW-Versions: All
3.1.4 Fault Code for LSO reporting: 3DIC
3.2 Fault Description
3.2.1 Fault Symptoms for customers:
Display problems, like missing lines or columns on the
LCD or display contrast problems.
3.2.2 Fault Symptom on GSM-Tester:
Display test fails.
3.3 Priority:
........ Mandatory
........ Repair
........ Optional
........ Not Yet Defined
V1.1 Page 8 of 31 ICM D CC ST
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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 display 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 to remove defective connector
Avoid excessive heat!
Watch surrounding components!!
Resolder new connector afterwards
3.4.1.3 Repair by SW-Booting
Not possible!
3.4.1.4 Test
Retest handset after repair.
V1.1 Page 9 of 31 ICM D CC ST
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3.4.2 List of needed material
3.4.2.1 Components Display connector A3x:
Part-Number: L36195-Z26-C624
3.4.2.2 Jigs and Tools
Soldering Iron
Hot Air Blower
3.4.2.3 Special Tools
None
3.4.2.4 Working materials
Desolder Wick / Braid
Solder
V1.1 Page 10 of 31 ICM D CC ST
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