Sony Xperia C3 User manual

1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
Troubleshooting Guide
- mechanical -
Xperia
T
MC3 Dual
S55t, S55u, D2502
Xperia
T
MC3
D2533

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
2(58)
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 ............................................................................................ 21
1.7.1Ear Speaker................................................................................................ 21
1.8Microphone......................................................................................... 22
1.8.1Primary Microphone.................................................................................. 22
1.8.1Secondary Microphone ............................................................................. 23
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
1.18Ambient Light Sensor ........................................................................ 37

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
3(58)
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
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

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
4(58)
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
5(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
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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
©Sony Mobile Communications AB – Company Internal
7(58)
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.
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
©Sony Mobile Communications AB – Company Internal
8(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
9(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
10(58)
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.
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
©Sony Mobile Communications AB – Company Internal
11(58)
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.
2. If the camera key switch is damaged – replace the Main
FPC Assy.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
12(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
13(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
14(58)
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
©Sony Mobile Communications AB – Company Internal
15(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
16(58)
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
©Sony Mobile Communications AB – Company Internal
17(58)
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
©Sony Mobile Communications AB – Company Internal
18(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
19(58)
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.
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.

Troubleshooting Guide (mech)
1290-1679 Rev 3
©Sony Mobile Communications AB – Company Internal
20(58)
Problem Areas: Speaker
3. If the FPC of Main FPC Assy is damaged – replace the
Main FPC Assy.
4. Replace Main PBA.