Siemens C62 Service Manual

C62

LEVEL 2.5

REPAIR DOCUMENTATION

V 1.1

TABLE OF CONTENTS:

INTRODUCTION..........................................................................................................................................3

2 IO-CONNECTOR.............................................................. FEHLER! TEXTMARKE NICHT DEFINIERT.

3 RTC BATTERY...........................................................................................................................................11

4 TRANSISTOR SOT-323 (FOR LEDS)......................................................................................................16

TRANSISTOR SOT-323 (FOR VIBRA) ...................................................................................................21

FUSE .............................................................................................................................................................26

7 VOLTAGE SUPRESSOR ............................................................................................................................31

8 TRANSISTOR SOT-223 ..............................................................................................................................36

9 ZENER DIODE.............................................................................................................................................41

10 LED COLOR YELLOW............................................................................................................................46

1 Introduction

The C62 is a triple band (EGSM900/GSM1800/GSM1900) handportable phone with a Li-Ion battery. There are three different colour variants. The colours are Eagle White, Pigeon Blue and Cherry Red. For every colour, there are eight different keymat variants: Latin, Chinese Stroke, Hebrew, Cyrillic, Thai, Bopomofo, Arabic and Greek.

Partnumber on IMEI label:

C62: S30880-S9230-Axxx,

where 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. 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 95 666 Fax: +49 2842 95 4302 E-mail: st-support@siemens.com

2 IO-Connector

2.1 Affected Units

2.1.1 Type: C62

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 system connector. Problems with SW booting.

2.2.2 Fault Symptom on GSM-Tester:

This fault cannot be detected with a GSM-Tester.

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 system connector visually. Watch for oxidation and dry joints!

2.4.1.2 Repair by component change

# Figure Instruction Note 1

Use a hot air blower to remove the defective system connector. Avoid excessive heat! Watch out for the surrounding components!!

Figure 2-1

Figure 2-2

Remove the defective connecter.

Add solder on the pads.

Figure 2-3

Figure 2-4

Add flux on the pads.

Re-solder the new system connector by using a hot air blower. Check that the connector is straight and exactly in right place.

Figure 2-5

Figure 2-6

2.4.1.3 Repair by SW-Booting

Not possible!

New connector is in its place.

2.4.1.4 Test

Charging problems can be discovered by measuring the voltage between pins 1 (Power) and 2 (GND). Voltage should be between 5V and 9,5V if system connector is working.

Circuit diagram of system connector

Test if accessories function well. In order to detect an accessory when plugged into the system connector, the following pins on the connector are used in the detection scenario: POWER, TX/D+, RX/D-, DATA/CTS, CLK/DCD and RTS. Table 1 shows the pins and their possible use in a detection scenario.

Table 1: Accessory coding options

Pin No. Signal name Default level Default

1 POWER L(Z) Off Open or charge source (Set by

2 GND GND - 3 TX/D+ H(Z) Out High/Low (Set by Phone) 4 RX/D- L(Z) In Open, Tx or high (Set by accessory) 5 DATA/CTS H(Z) In Open, Tx or low (Set by accessory) 6 RTS H(Z) In Open, Tx or low (Set by accessory) 7 CLK/DCD H(Z) In Open, Tx or low (Set by accessory)

Possible coding options

direction

accessory)

The different coding options for the supported accessories can be seen in Table 2.

Table 2: Accessory coding table

RX/D- DATA/CTS CLK/DCD RTS Description

OPEN OPEN OPEN OPEN Default: No accessory connected TX/D+ GND OPEN TX/D+ Headset TX/D+ GND GND TX/D+ Headset with PTT pressed HIGH OPEN GND OPEN Car Kit portable

2.4.2 List of needed material

2.4.2.1 Components

System connector female 12pin SMD Part Number: L36197-F5121-F730

2.4.2.2 Jigs and Tools

Hot air blower Tweezers Inspection lamp

2.4.2.3 Special Tools

None

2.4.2.4 Working materials

Flux Solder

2.4.3 Drawings

Figure 1: C62 board, system connector side

Figure 2: C62 system connector placement (top view)

Figure 3: C62 system connector

Table 3: Siemens C62 system connector pin description

Pin Name IN/OUT Notes 1 POWER I Charging Current

2 GND Common GND 3 TX O Serial interface, used for Flash

programming and ITP commands

4 RX I Serial interface, used for Flash

programming and ITP commands

5 DATA/CTS I/O Serial interface, used for AT-

commands. Data line for accessory bus. Use as CTS in data operation.

Used for accessory detection 6 RTS I Used for accessory detection 7 CLK/DCD I/O Serial interface, used for AT-

commands.

Used for accessory detection 8 Audio L O Dual -ended (other end is Audio R)

output for external receiver (mono) 9 Audio_Ref/V

I Used for 12V flash programming

voltage 10 Audio R O Dual -ended (other end is Audio L)

output for external receiver (mono) 11 Gnd_Micro GND external microphone 12 Micro I Input for external microphone

Table 4: Lumberg signal levels

Pin no. Signal name Level Min [V] Max [V]

3 TX/D+ VOH VOL 2.17 0 3.00 0.20 4 RX/D- VIH VIL 2.10 0 3.60 0.48 5 DATA/CTS VIH VIL

OH VOL

2.10 0 2.17 0 3.30 0.46 3.00 0.42

6 RTS VIH VIL 2.10 0 3.30 0.46 7 CLK/DCD VIH VIL 2.10 0 3.30 0.46

3 RTC battery

3.1 Affected Units

3.1.1 Type: C62

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:

The clock is reset when battery is switched off and on.

3.2.2 Fault Symptom on GSM-Tester:

This fault cannot be detected with a GSM-tester.

3.3 Priority:

 ........ Mandatory

⌧ 

........ Repair

........ Optional

 ........ Not Yet Defined

3.4 Repair Documentation

3.4.1 Description of procedure:

3.4.1.1 Diagnosis

Check the RTC battery visually. Watch for dry joints!

3.4.1.2 Repair by component change

# Figure Instruction Note 1

Use a hot air blower to remove the defective RTC battery. Avoid excessive heat! Watch out for the surrounding components!

Figure 3-1

Figure 3-2

Figure 3-3

The defective RTC battery is removed.

Add solder on the pads.

Figure 3-4

Figure 3-5

Add flux on the pads.

Re-solder the new RTC battery by using a hot air blower and a soldering iron if necessary. Check that the RTC battery is exactly in right place. Watch surrounding components!

Figure 3-6

3.4.1.3 Repair by SW-Booting

3.4.1.4 Test

Not possible!

Retest the handset after the repair. If clock resets when battery is removed, RTC battery is faulty. Measurement with voltage meter, the voltage should be 1.8V. Note! If battery is empty, wait that it charges and voltage raises up to

1.8V.

New RTC battery is in its place.

3.4.2 List of needed material

3.4.2.1 Components

RTC-battery SMD VA6 Part Number: L36145-K1310-X293

3.4.2.2 Jigs and Tools

Hot air blower Soldering iron Tweezers

3.4.2.3 Special Tools

None

3.4.2.4 Working materials

Flux Solder

3.4.3 Drawings

Figure 1: C62 board, RTC battery side

Figure 2: C62 RTC battery placement (top view)

Figure 3: C62 RTC battery

4 Transistor SOT-323 (for LEDs)

4.1 Affected Units

4.1.1 Type: C62

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:

4.2.2 Fault Symptom on GSM-Tester:

4.3 Priority:

 ........ Mandatory

⌧ 

........ Repair

........ Optional

 ........ Not Yet Defined

4.4 Repair Documentation

4.4.1 Description of procedure:

Display light does not work.

This fault cannot be detected with a GSM-tester.

4.4.1.1 Diagnosis

Check the transistor visually. Watch for dry joints!

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