Sony Xperia Z2 Trouble Shooting Guide mechanical Rev2

TM

Troubleshooting Guide

- mechanical -

Xperia

L50t, L50u

1286-9334 Rev 2



Sony Mobile Communications AB – Company Internal

Z2

Company Internal

Troubleshooting Guide (mech)

CONTENTS

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 ............................................................................................ 20

1.7.1 Ear Speaker ................................................................................................ 20

1.8 Microphone ......................................................................................... 21

1.8.1 Primary Microphone .................................................................................. 21

1.8.1 Secondary Microphone ............................................................................. 22

1.9 Vibrator ............................................................................................... 24

1.9.1 Vibrator not generating alerts .................................................................. 24

1.10 Camera ................................................................................................ 26

1.10.1 Main Camera .............................................................................................. 26

1.10.2 Video Call Camera defects ........................................................................ 27

1.11 Flash LED ........................................................................................... 28

1.11.1 Flash LED not flashing .............................................................................. 28

1.12 Bluetooth and WLAN ......................................................................... 29

1.12.1 Bluetooth or WLAN connection failure .................................................... 29

1.13 NFC ..................................................................................................... 30

1.13.1 NFC malfunctions ...................................................................................... 30

1.14 GPS ..................................................................................................... 31

1.14.1 GPS malfunctions ...................................................................................... 31

1.15 Compass ............................................................................................. 32

1.15.1 Compass fails ............................................................................................ 32

1.16 Accelerometer .................................................................................... 33

1.16.1 Accelerometer test fails ............................................................................ 33

1.17 Gyroscope .......................................................................................... 34

1.17.1 Gyroscope test fails .................................................................................. 34

1.18 Ambient Light Sensor ........................................................................ 35

1.18.1 Light Sensor malfunctions ....................................................................... 35

1286-9334 Rev 2

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Sony Mobile Communications AB –

2(70)

Company Internal

Troubleshooting Guide (mech)

1.19 Proximity Switch ................................................................................ 37

1.19.1 Proximity switch malfunctions ................................................................. 37

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

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

1.21 Water Resistance ............................................................................... 40

1.21.1 Water Resistance fails............................................................................... 40

1.22 Real Time Clock ................................................................................. 47

1.22.1 Real time clock test fails ........................................................................... 47

1.23 Total call time ..................................................................................... 48

1.23.1 Total call time fails .................................................................................... 48

1.24 External Memory ................................................................................ 49

1.24.1 Memory Card not detected ....................................................................... 49

1.25 Security ............................................................................................... 50

1.25.1 Security fails .............................................................................................. 50

1.26 FM Radio ............................................................................................. 51

1.26.1 No/Poor FM Radio reception .................................................................... 51

1.27 Battery Health test ............................................................................. 52

1.27.1 Battery Health test fails ............................................................................. 52

1.28 Flip Slider Counter ............................................................................. 53

1.28.1 Flip Slider Counter fails ............................................................................ 53

1.29 Verify Certificates ............................................................................... 54

1.29.1 Verify Certificates fails .............................................................................. 54

1.30 IrDA Test ............................................................................................. 55

1.30.1 IrDA test fails ............................................................................................. 55

1.31 TV-Out Test ......................................................................................... 56

1.31.1 TV-Out test fails ......................................................................................... 56

1.32 Network & Signal ................................................................................ 57

1.32.1 No/Poor signal ........................................................................................... 57

1.33 SIM ...................................................................................................... 64

1.33.1 SIM not detected ........................................................................................ 64

1.33.2 Incorrect UIM or SIM indicated ................................................................. 64

1.34 Charging ............................................................................................. 65

1.34.1 Battery will not charge by USB connector .............................................. 65

1.34.2 Battery will not charge by charge pad ..................................................... 65

1.35 HandsFree by Wire ............................................................................. 68

1.35.1 Connection to portable Handsfree fails ................................................... 68

1.36 Data Communication ......................................................................... 69

1.36.1 Data transfer via System Connector fails ................................................ 69

2 Revision History ........................................................................... 70

1286-9334 Rev 2



Sony Mobile Communications AB –

3(70)

Company Internal

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: Noise Cancelling Calibration always must be performed when Top FPC Assy replacement
or Board Swap; 1262-6643 Trouble Shooting Application – mechanical.

Note: Gyroscope and Accelerometer Calibration always must be performed when Board Swap or
wrong Gyroscope or Accelerometer readouts; 1262-6643 Trouble Shooting Application –
mechanical.

1286-9334 Rev 2



Sony Mobile Communications AB –

4(70)

Company Internal

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’.

Troubleshooting Guide (mech)

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.

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.

1286-9334 Rev 2

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Sony Mobile Communications AB –

5(70)

Company Internal

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)

1286-9334 Rev 2



Sony Mobile Communications AB –

6(70)

Company Internal

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 Relay 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 Relay FPC Assy is damaged – replace the
Relay FPC Assy.

4. Replace Main PBA.

1286-9334 Rev 2



Sony Mobile Communications AB –

7(70)

Company Internal

Problem Areas: Keys

Check:

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

Action:

1. If dirty – clean them.

Troubleshooting Guide (mech)

2. If the rubber of the Volume Key is damaged – replace the
Display Frame Assy.

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

1.2.3 On/Off Key

Check:

Inspect the external area of the Power Key.

Action:

If dirty – clean it.

1286-9334 Rev 2



Sony Mobile Communications AB –

8(70)

Company Internal

Problem Areas: Keys

Check:

Inspect the BtB connector of Relay 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 Relay FPC Assy is damaged – replace the
Relay 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
Display Frame Assy.

1286-9334 Rev 2



Sony Mobile Communications AB –

9(70)

Company Internal

Problem Areas: Keys

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

4. Replace Main PBA.

1286-9334 Rev 2



Sony Mobile Communications AB –

10(70)

Company Internal

Problem Areas: Keys

Check:

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

Action:

1. If dirty – clean them.

Troubleshooting Guide (mech)

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

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

1286-9334 Rev 2



Sony Mobile Communications AB –

11(70)

Company Internal

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.

Troubleshooting Guide (mech)

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

Check:

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

4. Replace Main PBA.

1286-9334 Rev 2



Sony Mobile Communications AB –

12(70)

Company Internal

Problem Areas: Touch Screen

Check:

Inspect the BtB connector of Display Frame Assy FPC to
Relay 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 Display Frame Assy FPC or FPC
is damaged – replace the Display Frame Assy.

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

Check:

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

Action:

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

2. If dirty or oxidized – clean it.

1286-9334 Rev 2



Sony Mobile Communications AB –

13(70)

Company Internal

Problem Areas: Touch Screen

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

4. Replace Main PBA.

Troubleshooting Guide (mech)

1286-9334 Rev 2



Sony Mobile Communications AB –

14(70)

Company Internal

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 Display Frame Assy FPC to
Relay 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 Display Frame Assy FPC or FPC
is damaged – replace the Display Frame Assy.

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

1286-9334 Rev 2



Sony Mobile Communications AB –

15(70)

Company Internal

Problem Areas: Display

Check:

Inspect the BtB connector of Relay FPC 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 FPC of Relay FPC Assy is damaged – replace the
Relay FPC Assy.

4. Replace Main PBA.

1286-9334 Rev 2



Sony Mobile Communications AB –

16(70)

Company Internal

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.

Troubleshooting Guide (mech)

Check:

Inspect the LED light guide on the Display Frame Assy.

Action:

1. If dirty – clean it.

2. If damaged – replace the Display Frame Assy.

Check:

Inspect the LED on the Main PBA.

Action:

1. If dirty – clean it.

2. Replace Main PBA.

1286-9334 Rev 2



Sony Mobile Communications AB –

17(70)

Company Internal

Problem Areas

1.6 Speaker

1.6.1 Loudspeaker

Check:

Inspect the Loudspeaker’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 contact pins on the Relay FPC Assy and the
contact pads on the Antenna Speaker Box Assy.

Action:

1. If dirty – clean them.

2. If the contact pads of the Antenna Speaker Box Assy or
the Loudspeaker are damaged – replace the Antenna
Speaker Box Assy.

1286-9334 Rev 2



Sony Mobile Communications AB –

18(70)

Company Internal

Problem Areas: Speaker

3. If the contact pins on the Relay FPC Assy are damaged ­replace the Relay FPC Assy.

Check:

Inspect the BtB connector of Relay FPC 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 FPC of Relay FPC Assy is damaged – replace the
Relay FPC Assy.

4. Replace Main PBA.

1286-9334 Rev 2



Sony Mobile Communications AB –

19(70)

Company Internal

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.

Check:

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

Action:

1. If dirty – clean them.

Troubleshooting Guide (mech)

2. If the contact pins of the Top Speaker or the Top Speaker
are damaged – replace the Top Speaker.

3. Replace Main PBA.

1286-9334 Rev 2



Sony Mobile Communications AB –

20(70)

Company Internal

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)

Check:

Inspect the primary microphone on the Relay FPC Assy.

Action:

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

Check:

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

Action:

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

2. If dirty or oxidized – clean it.

1286-9334 Rev 2



Sony Mobile Communications AB –

21(70)