Sony XperiaC3 Dual, S55t, S55u, D2502, Xperia C3 Troubleshooting Guide

Troubleshooting Guide

T

T

- mechanical -

M

Xperia

C3 Dual

S55t, S55u, D2502

1290-1679 Rev 3

©

Sony Mobile Communications AB – Company Internal

Xperia

D2533

M

C3

CONTENTS

Troubleshooting Guide (mech)

1Problem Areas ................................................................................ 5

1.1 Power .................................................................................................... 5

1.1.1Will not power on or will switch off randomly ........................................... 5

1.2 Keys ...................................................................................................... 7

1.2.1Back, Menu, Home and Multitask Keys ..................................................... 7

1.2.2Volume Key .................................................................................................. 7

1.2.3On/Off Key .................................................................................................... 8

1.2.4Camera Key ................................................................................................ 10

1.3 Touch Screen ..................................................................................... 12

1.3.1Touch Screen malfunction ........................................................................ 12

1.4 Display ................................................................................................ 15

1.4.1Graphics & Illumination ............................................................................ 15

1.5 LED/Illumination ................................................................................. 17

1.5.1LED/Illumination ........................................................................................ 17

1.6 Speaker ............................................................................................... 18

1.6.1Loudspeaker .............................................................................................. 18

1.7 Earphone ............................................................................................ 21

1.7.1Ear Speaker ................................................................................................ 21

1.8 Microphone ......................................................................................... 22

1.8.1Primary Microphone .................................................................................. 22

1.8.1Secondary Microphone ............................................................................. 23

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1.9 Vibrator ............................................................................................... 25

1.9.1Vibrator not generating alerts .................................................................. 25

1.10 Camera ................................................................................................ 27

1.10.1Main Camera .............................................................................................. 27

1.10.2Video Call Camera defects ........................................................................ 28

1.11 Flash LED ........................................................................................... 29

1.11.1Back Flash LED not flashing .................................................................... 29

1.11.2Front Flash LED not flashing .................................................................... 29

1.12 Bluetooth and WLAN ......................................................................... 31

1.12.1Bluetooth or WLAN connection failure .................................................... 31

1.13 NFC ..................................................................................................... 32

1.13.1NFC malfunctions ...................................................................................... 32

1.14 GPS ..................................................................................................... 33

1.14.1GPS malfunctions ...................................................................................... 33

1.15 Compass ............................................................................................. 34

1.15.1Compass fails ............................................................................................ 34

1.16 Accelerometer .................................................................................... 35

1.16.1Accelerometer test fails ............................................................................ 35

1.17 Gyroscope .......................................................................................... 36

1.17.1Gyroscope test fails .................................................................................. 36

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1.18 Ambient Light Sensor ........................................................................ 37

1290-1679 Rev 3

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Troubleshooting Guide (mech)

1.18.1Light Sensor malfunctions ....................................................................... 37

1.19 Proximity Switch ................................................................................ 38

1.19.1Proximity switch malfunctions ................................................................. 38

1.20 Pressure Sensor ................................................................................. 39

1.20.1Pressure Sensor test fails ......................................................................... 39

1.21 Real Time Clock ................................................................................. 40

1.21.1Real time clock test fails ........................................................................... 40

1.22 Total call time ..................................................................................... 41

1.22.1Total call time fails .................................................................................... 41

1.23 External Memory ................................................................................ 42

1.23.1Memory Card not detected ....................................................................... 42

1.24 Security ............................................................................................... 43

1.24.1Security fails .............................................................................................. 43

1.25 FM Radio ............................................................................................. 44

1.25.1No/Poor FM Radio reception .................................................................... 44

1.26 Battery Health test ............................................................................. 45

1.26.1Battery Health test fails ............................................................................. 45

1.27 Flip Slider Counter ............................................................................. 46

1.27.1Flip Slider Counter fails ............................................................................ 46

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1.28 Verify Certificates ............................................................................... 47 

1.28.1Verify Certificates fails .............................................................................. 47

1.29 IrDA Test ............................................................................................. 48

1.29.1IrDA test fails ............................................................................................. 48

1.30 TV-Out Test ......................................................................................... 49

1.30.1TV-Out test fails ......................................................................................... 49

1.31 Network & Signal ................................................................................ 50

1.31.1No/Poor signal ........................................................................................... 50

1.32 SIM ...................................................................................................... 54

1.32.1SIM not detected ........................................................................................ 54

1.32.2Incorrect UIM or SIM indicated ................................................................. 54

1.33 Charging ............................................................................................. 55

1.33.1Battery will not charge by USB connector .............................................. 55

1.34 HandsFree by Wire ............................................................................. 56

1.34.1Connection to portable Handsfree fails ................................................... 56

1.35 Data Communication ......................................................................... 57

1.35.1Data transfer via System Connector fails ................................................ 57

2Revision History ........................................................................... 58

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1290-1679 Rev 3

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Troubleshooting Guide (mech)

Always firstly disconnect the Battery FPC BtB connector to cut off power supply when the Sub
Antenna Assy is disassembled.

Always finally connect the Battery FPC BtB connector before the Sub Antenna Assy is
reassembled.

Note: Accelerometer Calibration always must be performed when Board Swap or wrong
Accelerometer readouts; 1289-2983 Trouble Shooting Application – mechanical.

Note: Touch Panel Calibration always must be performed when replacing Display Frame Assy;
1289-2983 Trouble Shooting Application – mechanical.

1290-1679 Rev 3

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1 Problem Areas

1.1 Power

1.1.1 Will not power on or will switch
off randomly

Check:

Check whether the phone vibrates by pressing the on/off
key.

Action:

1. If activation of the vibrator is detected, refer to section 1.4
‘Display’.

2. If NO activation of the Vibrator is detected, check that the
battery is charging when connected to a charger.

Follow Test Instruction - mechanical chapter 2.3.7
(Charging via USB and Easy Charger), Diagnostic
Battery / Charging status.

Troubleshooting Guide (mech)

Check:

Inspect the on/off key.

Action:

Refer to section 1.2.3 ‘On/Off Key’.

Check:

Inspect the BtB connector of the Battery to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean the both sides of the BtB
connector.

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Problem Areas: Power

3. If the BtB connector, the Battery FPC or the Battery is
damaged – replace the Battery.

4. Replace Main PBA.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.2 Keys

1.2.1 Back, Menu, Home and
Multitask Keys

Action:

1. Refer to section 1.3 ‘Touch Screen’.

2. Replace Main PBA.

1.2.2 Volume Key

Check:

Inspect the external area of the Key Volume.

Action:

If dirty – clean it.

Troubleshooting Guide (mech)

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC of Main FPC Assy is damaged – replace the
Main FPC Assy.

4. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas: Keys

Check:

Inspect the rubber of the Volume Key (a) and Volume Key
switch (b).

Action:

1. If dirty – clean them.

2. If the rubber of the Volume Key is damaged – replace the
Power/Side Key Assy.

Troubleshooting Guide (mech)

3. If the volume key switch is damaged – replace the Main
FPC Assy.

1.2.3 On/Off Key

Check:

Inspect the external area of the Power Key.

Action:

If dirty – clean it.

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Problem Areas: Keys

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC of Main FPC Assy is damaged – replace the
Main FPC Assy.

4. Replace Main PBA.

Troubleshooting Guide (mech)

Check:

Inspect the rubber of the Power Key (a) and Power Key
switch (b).

Action:

1. If dirty – clean them.

2. If the rubber of the power key is damaged – replace the
Power/Side Key Assy.

1290-1679 Rev 3

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Problem Areas: Keys

3. If the power key switch is damaged – replace the Main
FPC Assy.

1.2.4 Camera Key

Check:

Inspect the external area of the Camera Key.

Action:

If dirty – clean it.

Troubleshooting Guide (mech)

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC of Main FPC Assy is damaged – replace the
Main FPC Assy.

4. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas: Keys

Check:

Inspect the rubber of the Camera Key (a) and Camera Key
switch (b).

Action:

1. If dirty – clean them.

2. If the rubber of the Camera Key is damaged – replace the
Camera Key Assy.

Troubleshooting Guide (mech)

2. If the camera key switch is damaged – replace the Main
FPC Assy.

1290-1679 Rev 3

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Problem Areas

1.3 Touch Screen

1.3.1 Touch Screen malfunction

Check:

Inspect the touch screen of the Display Frame Assy.

Action:

1. If dirty – clean it.

2. If scratched or damaged – replace the Display Frame
Assy.

Troubleshooting Guide (mech)

Check:

Inspect the BtB connector of Touch Panel FPC to LCD FPC.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the BtB connector of touch panel FPC or FPC is
damaged – replace the Display Frame Assy.

4. If the BtB connector of LCD FPC or FPC is damaged –
replace the Display Frame Assy.

5. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas: Touch Screen

Check:

Inspect the BtB connector of Display FPC to Main FPC
Assy.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the BtB connector of Display FPC or FPC is damaged –
replace the Display Frame Assy.

Troubleshooting Guide (mech)

3. If the BtB connector of Main FPC Assy or FPC is
damaged – replace the Main FPC Assy.

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

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Problem Areas: Touch Screen

3. If the FPC of Main FPC Assy is damaged – replace the
Main FPC Assy.

4. Replace Main PBA.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.4 Display

1.4.1 Graphics & Illumination

Check:

Check whether the phone vibrates after the on/off key has
been pressed.

Action:

If the activation described above is not detected, refer to
section 1.1 ‘Power’.

Check:

Inspect the BtB connector of LCD FPC to Main FPC Assy.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

Troubleshooting Guide (mech)

3. If the BtB connector of LCD FPC or FPC is damaged –
replace the Display Frame Assy.

3. If the BtB connector of Main FPC Assy or FPC is
damaged – replace the Main FPC Assy.

1290-1679 Rev 3

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Problem Areas: Display

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC of Main FPC Assy is damaged – replace the
Main FPC Assy.

4. Replace Main PBA.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.5 LED/Illumination

1.5.1 LED/Illumination

Check:

Inspect external port of LED on the Display Frame Assy.

Action:

1. If dirty – clean it.

Check:

Inspect the LED on the Main PBA.

Action:

1. If dirty – clean it.

2. Replace Main PBA.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.6 Speaker

1.6.1 Loudspeaker

Check:

Inspect the Loudspeaker’s external port on the Back Cover
Assy.

Action:

1. If clogged – clean it.

Troubleshooting Guide (mech)

2. If damaged – replace the Speaker Net.

Check:

Inspect the Speaker Mesh on the Ant Speaker Bottom
Frame Assy.

Action:

1. If clogged – clean it.

2. If damaged – replace the Speaker Mesh.

1290-1679 Rev 3

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Problem Areas: Speaker

Check:

Inspect the contact pins on the Main FPC Assy and the
contact pads on the Ant Speaker Bottom Frame Assy.

Action:

1. If dirty – clean them.

2. If the contact pads of the Ant Speaker Bottom Frame
Assy or the Loudspeaker are damaged – replace Ant
Speaker Bottom Frame Assy.

Troubleshooting Guide (mech)

3. If the contact pins on the Main FPC Assy are damaged -

replace the Main FPC Assy.

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

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Problem Areas: Speaker

3. If the FPC of Main FPC Assy is damaged – replace the

Main FPC Assy.

4. Replace Main PBA.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.7 Earphone

1.7.1 Ear Speaker

Check:

Inspect the external port of Ear Speaker on the Display
Frame Assy.

Action:

1. If clogged – clean it.

Troubleshooting Guide (mech)

2. If damaged – replace the Display Frame Assy.

Check:

Inspect the contact pins of Ear Speaker and the contact
pads on the Main PBA.

Action:

1. If dirty – clean them.

2. If the contact pins of the Ear Speaker or the Ear Speaker

are damaged – replace the Earspeaker.

3. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas

1.8 Microphone

1.8.1 Primary Microphone

Check:

Inspect the Primary Microphone’s external port on the
Display Frame Assy.

Action:

1. If clogged – clean it.

Troubleshooting Guide (mech)

2. If damaged – replace the Display Frame Assy.

Check:

Inspect the primary microphone on the Main FPC Assy.

Action:

1. If the microphone or the FPC is damaged – replace the
Main FPC Assy.

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Problem Areas: Microphone

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC of Main FPC Assy is damaged – replace the

Main FPC Assy.

4. Replace Main PBA.

Troubleshooting Guide (mech)

1.8.1 Secondary Microphone

Check:

Inspect the external port of secondary microphone on the
Back Cover Assy.

Action:

1. If clogged – clean it.

Check:

Inspect the 2nd Mic Mesh.

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Problem Areas: Microphone

Action:

1. If damaged – replace the 2nd Mic Mesh.

Check:

Inspect the 2nd Mic Rubber.

Action:

1. If dirty – clean it.

Troubleshooting Guide (mech)

2. If damaged – replace the 2nd Mic Rubber.

Check:

Inspect the secondary microphone on the Main PBA.

Action:

1. If dirty – clean it.

2. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas

1.9 Vibrator

1.9.1 Vibrator not generating alerts

Check:

Inspect the BtB connector of Vibrator to Sub PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the connector or cables of vibrator or vibrator itself is

damaged – replace the Vibrator.

Troubleshooting Guide (mech)

4. If the connector of vibrator on Sub PBA is damaged –

replace the Sub PBA.

Check:

Inspect the BtB connector of Sub PBA to the Main FPC
Assy.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

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Problem Areas: Vibrator

3. If the BtB connector on Sub PBA is damaged – replace the
Sub PBA.

4. If the FPC of Main FPC Assy is damaged – replace the Main
FPC Assy.

Troubleshooting Guide (mech)

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC of Main FPC Assy is damaged – replace the Main
FPC Assy.

4. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas

1.10 Camera

1.10.1 Main Camera

Check:

Inspect the external area of Camera Window.

Action:

1. If dirty – clean it.

Troubleshooting Guide (mech)

2. If scratched or damaged – replace the Camera Window.

Check:

Inspect the BtB connector of Main Camera to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the BtB connector or the Main Camera is damaged –

replace the Main Camera.

4. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas: Camera

1.10.2 Video Call Camera defects

Check:

Inspect the external area of the video camera window.

Action:

1. If dirty – clean it.

2. If scratched or damaged – replace the Display Frame

Assy.

Troubleshooting Guide (mech)

Check:

Inspect the BtB connector of Chat Camera to the Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC or the Chat Camera is damaged – replace the

Chat Camera.

4. Replace Main PBA.

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Problem Areas

1.11 Flash LED

1.11.1 Back Flash LED not flashing

Check:

Inspect the back flash LED Light Guide.

Action:

1. If dirty – clean it.

2. If scratched or damaged – replace the Ant Top Frame

Assy.

Troubleshooting Guide (mech)

Check:

Inspect the back Flash LED on the Main PBA.

Action:

1. If dirty – clean it.

2. Replace Main PBA.

1.11.2 Front Flash LED not flashing

Check:

Inspect the external area of the front flash LED.

Action:

1. If dirty – clean it.

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Problem Areas: Flash LED

2. If scratched or damaged – replace the Display Frame

Assy.

Check:

Inspect the front flash LED Light Guide.

Action:

1. If dirty – clean it.

Troubleshooting Guide (mech)

Check:

Inspect the front Flash LED on the Main PBA.

Action:

1. If dirty – clean it.

2. Replace Main PBA.

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Problem Areas

1.12 Bluetooth and WLAN

1.12.1 Bluetooth or WLAN connection
failure

Check:

Inspect the WLAN/BT Antenna contact pad on Ant Top
Frame Assy and the contact pin on main PBA.

Action:

1. If dirty or oxidized – clean the pads and pins.

2. If the contact pad on Ant Top Frame Assy or Ant Top

Frame Assy is damaged – replace the Ant Top Frame Assy.

Troubleshooting Guide (mech)

3. If the contact pin on main PBA is damaged – replace Main

PBA.

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Problem Areas

1.13 NFC

1.13.1 NFC malfunctions

Check:

Inspect the NFC antenna contact pads on Ant Top Frame
Assy and the contact pins on Main PBA.

Action:

1. If dirty or oxidized – clean the pads and pins.

2. If the NFC antenna contact pads or NFC antenna film is

damaged – replace the Ant Top Frame Assy.

Troubleshooting Guide (mech)

3. If the contact pins on main PBA is damaged – replace

Main PBA.

1290-1679 Rev 3

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Problem Areas

1.14 GPS

1.14.1 GPS malfunctions

Check:

Inspect the GPS antenna contact pad on Ant Top Frame
Assy and the contact pin on Main PBA.

Action:

1. If dirty or oxidized – clean the pad and pin.

2. If the GPS antenna contact pad is damaged – replace the

Ant Top Frame Assy.

Troubleshooting Guide (mech)

3. If the contact pin on main PBA is damaged – replace

Main PBA.

1290-1679 Rev 3

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Problem Areas

1.15 Compass

1.15.1 Compass fails

Check:

Inspect the BtB connector of Main FPC Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the FPC of Main FPC Assy is damaged – replace the

Main FPC Assy.

Troubleshooting Guide (mech)

Check:

Inspect the compass chip on the Main FPC Assy.

Action:

1. If the compass chip is damaged – replace the Main FPC
Assy.

2. Replace Main PBA.

1290-1679 Rev 3

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Problem Areas

1.16 Accelerometer

1.16.1 Accelerometer test fails

Action:

1. Follow the 1289-2983 Trouble Shooting Application –
mechanical to run the Accelerometer Calibration.

2. Replace Main PBA.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.17 Gyroscope

1.17.1 Gyroscope test fails

N/A.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.18 Ambient Light Sensor

1.18.1 Light Sensor malfunctions

Check:

Inspect the external window area of light sensor on the
Display Frame Assy.

Action:

1. If dirty – clean it.

2. If scratched or damaged – replace the Display Frame

Assy.

Troubleshooting Guide (mech)

Check:

Inspect light sensor on the Main PBA.

Action:

1. If dirty – clean it.

2. Replace Main PBA.

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Problem Areas

1.19 Proximity Switch

1.19.1 Proximity switch malfunctions

Check:

Inspect the external window area of proximity switch and the
proximity sensor on the Display Frame Assy.

Action:

1. If dirty – clean it.

2. If scratched or damaged – replace the Display Frame

Assy.

Troubleshooting Guide (mech)

Check:

Inspect the proximity sensor and proximity switch on the
Main PBA.

Action:

1. If dirty – clean it.

2. Replace Main PBA.

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Problem Areas

1.20 Pressure Sensor

1.20.1 Pressure Sensor test fails

N/A.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.21 Real Time Clock

1.21.1 Real time clock test fails

Action:

Replace Main PBA.

Troubleshooting Guide (mech)

1290-1679 Rev 3

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Problem Areas

1.22 Total call time

1.22.1 Total call time fails

Action:

Replace Main PBA.

Troubleshooting Guide (mech)

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Problem Areas

1.23 External Memory

1.23.1 Memory Card not detected

Check:

Inspect that if a memory card is properly inserted.

Action:

If not properly inserted – insert the memory card correctly.

Check:

Inspect the memory card holder on Main PBA.

Action:

1. If dirty or clogged – clean the holder.

2. Replace Main PBA.

Troubleshooting Guide (mech)

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Problem Areas

1.24 Security

1.24.1 Security fails

Action:

Replace Main PBA.

Troubleshooting Guide (mech)

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Problem Areas

1.25 FM Radio

1.25.1 No/Poor FM Radio reception

Check:

Inspect the external port of the Audio Jack Assy.

Action:

1. If dirty or oxidized – clean it.

Check:

Inspect the BtB connector of Audio Jack Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

Troubleshooting Guide (mech)

3. If the BtB connector or FPC of Audio Jack Assy is

damaged – replace the Audio Jack Assy.

4. Replace Main PBA.

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Problem Areas

1.26 Battery Health test

1.26.1 Battery Health test fails

N/A.

Troubleshooting Guide (mech)

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Problem Areas

1.27 Flip Slider Counter

1.27.1 Flip Slider Counter fails

N/A. Not slider phone.

Troubleshooting Guide (mech)

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Problem Areas

1.28 Verify Certificates

1.28.1 Verify Certificates fails

Action:

N/A.

Troubleshooting Guide (mech)

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Problem Areas

1.29 IrDA Test

1.29.1 IrDA test fails

N/A. No IrDA functionality in the phone.

Troubleshooting Guide (mech)

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Problem Areas

1.30 TV-Out Test

1.30.1 TV-Out test fails

Check:

Inspect the USB connector.

Action:

1. If dirty or oxidized – clean the connector.

2. Replace Main PBA.

Troubleshooting Guide (mech)

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Problem Areas

1.31 Network & Signal

1.31.1 No/Poor signal

Check:

Inspect the main antenna on the Ant Speaker Bottom Frame
Assy.

Action:

If damaged – replace the Ant Speaker Bottom Frame Assy.

Troubleshooting Guide (mech)

Check:

Inspect the contact pads on the Ant Speaker Bottom Frame
Assy and the contact pins on Sub PBA.

Action:

1. If dirty or oxidized – clean the pads and pins.

2. If the contact pads are damaged – replace the Ant

Speaker Bottom Frame Assy.

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Problem Areas: Network & Signal

3. If the contact pins are damaged – replace the Sub PBA.

Check:

Inspect the RF connector of RF Cable to the Sub PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

Troubleshooting Guide (mech)

3. If the connector on the Sub PBA is damaged – replace

Sub PBA.

4. If the RF Cable is damaged – replace the RF Cable.

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Problem Areas: Network & Signal

Check:

Inspect the RF connector of RF Cable to the Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

3. If the RF Cable is damaged – replace the RF Cable.

Troubleshooting Guide (mech)

4. If the connector on the main PBA is damaged – replace

Main PBA.

Check:

Inspect the diversity antenna on the Ant Top Frame Assy.

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Problem Areas: Network & Signal

Action:

If damaged – replace the Ant Top Frame Assy.

Check:

Inspect the Diversity antenna contact pads on Ant Top
Frame Assy and the contact pins on Main PBA.

Action:

1. If dirty or oxidized – clean the pads and pins.

Troubleshooting Guide (mech)

2. If the Diversity antenna contact pads are damaged –

replace the Ant Top Frame Assy.

3. If the contact pins on main PBA is damaged – replace

Main PBA.

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Problem Areas

1.32 SIM

1.32.1 SIM not detected

Check:

Inspect the external port of the SIM card holder and check if
a SIM Tray can be properly inserted.

Action:

If dirty or clogged – clean the external port.

Check:

Inspect the SIM Tray.

Action:

1. If the SIM Tray is damaged – Replace it.

Troubleshooting Guide (mech)

Check:

Inspect the SIM card holder on Main PBA.

Action:

1. If dirty or clogged – clean the holder.

2. Replace Main PBA.

Note! Non-standard SIM card, Nano card with SIM
holder, and manually-cut SIM card may damage SIM
card holder.

1.32.2 Incorrect UIM or SIM indicated

Check:

Check whether the phone is locked to a particular operator
and whether the correct operator UIM or SIM is being used.

Action:

1. Use a proper operator UIM/SIM or test UIM/SIM.

2. Replace Main PBA.

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Problem Areas

1.33 Charging

1.33.1 Battery will not charge by USB
connector

Check:

Inspect the USB connector.

Action:

1. If dirty or oxidized – clean the connector.

2. Replace Main PBA.

Check:

Inspect the BtB Connector of the Battery to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean the both sides of the BtB
connector.

Troubleshooting Guide (mech)

3. If the BtB connector, the Battery FPC or Battery is

damaged – replace the Battery.

4. Replace Main PBA.

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Problem Areas

1.34 HandsFree by Wire

1.34.1 Connection to portable
Handsfree fails

Check:

Inspect the external port of the Audio Jack Assy.

Action:

1. If dirty or oxidized – clean it.

Check:

Inspect the BtB connector of Audio Jack Assy to Main PBA.

Action:

1. If not properly connected – disconnect and reconnect it.

2. If dirty or oxidized – clean it.

Troubleshooting Guide (mech)

3. If the BtB connector of Audio Jack Assy or FPC is

damaged – replace the Audio Jack Assy.

4. Replace Main PBA.

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Problem Areas

1.35 Data Communication

1.35.1 Data transfer via System
Connector fails

Check:

Inspect the USB connector.

Action:

1. If dirty or oxidized – clean the connector.

2. Replace Main PBA.

Troubleshooting Guide (mech)

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Troubleshooting Guide (mech)

2 Revision History

Rev. Date Changes / Comments

1 2014-Jul-18 Initial release

2 2014-Jul-24 Update document since no need Proximity Sensor Calibration any more.

3 2014-Aug-08 Added D2533/D2502

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