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
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
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)
Company Internal
Problem Areas: Microphone
3. If the FPC of Relay FPC Assy is damaged – replace the
Relay FPC Assy.
4. Replace Main PBA.
1.8.1 Secondary Microphone
Check:
Inspect the external port of secondary microphone on the
Display Frame Assy.
Action:
1. If clogged – clean it.
Troubleshooting Guide (mech)
Check:
Inspect the Holder 2nd Mic.
Action:
1. If damaged – replace the Holder 2nd Mic.
1286-9334 Rev 2
Sony Mobile Communications AB –
22(70)
Company Internal
Problem Areas: Microphone
Check:
Inspect the secondary microphone mesh on the Display
Frame Assy.
Action:
1. If dirty – clean it.
Troubleshooting Guide (mech)
2. If damaged – replace the Display Frame Assy.
Check:
Inspect the secondary microphone on the Main PBA.
Action:
1. If dirty – clean it.
2. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
23(70)
Company Internal
Problem Areas
1.9 Vibrator
1.9.1 Vibrator not generating alerts
Check:
Inspect the BtB connector of Vibrator 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 connector or cables of vibrator or vibrator itself is
damaged – replace the Vibrator.
4. If the connector of vibrator on Relay FPC Assy 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 –
24(70)
Company Internal
Problem Areas: Vibrator
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 –
25(70)
Company Internal
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 Back Panel Assy.
Check:
Inspect the BtB connector of 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 Camera is damaged – replace
the Camera.
4. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
26(70)
Company Internal
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.
Troubleshooting Guide (mech)
2. If scratched or damaged – replace the Display Frame
Assy.
Check:
Inspect the ZIF connector of Camera Chat to the Main PBA.
Action:
1. If not properly connected – disconnect and reconnect it.
2. If dirty or oxidized – clean the both sides of the ZIF
connector.
3. If the FPC or the Camera Chat is damaged – replace the
Camera Chat.
4. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
27(70)
Company Internal
Problem Areas
1.11 Flash LED
1.11.1 Flash LED not flashing
Check:
Inspect the external area of the flash LED Light Guide.
Action:
1. If dirty – clean it.
Troubleshooting Guide (mech)
2. If scratched or damaged – replace the Back Panel Assy.
Check:
Inspect the Flash LED on the Main PBA.
Action:
1. If dirty – clean it.
2. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
28(70)
Company Internal
Problem Areas
1.12 Bluetooth and WLAN
1.12.1 Bluetooth or WLAN connection
failure
Check:
Inspect the WLAN/BT Flex Antenna contact pads on Ant
WLAN/BT Holder 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 contact pads on Ant WLAN/BT Holder Assy or
WLAN/BT Flex Antenna film is damaged – replace the Ant
WLAN/BT Holder Assy.
3. If the contact pins on main PBA is damaged – replace
Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
29(70)
Company Internal
Problem Areas
1.13 NFC
1.13.1 NFC malfunctions
Check:
Inspect the NFC antenna contact pads on Back Panel 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 NFC antenna contact pads is damaged – replace
the Back Panel Assy.
3. If the contact pins on main PBA is damaged – replace
Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
30(70)
Company Internal
Problem Areas
1.14 GPS
1.14.1 GPS malfunctions
Check:
Inspect the GPS antenna contact pads on Display 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 GPS antenna contact pads is damaged – replace
the Display Frame Assy.
3. If the contact pins on main PBA is damaged – replace
Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
31(70)
Company Internal
Problem Areas
1.15 Compass
1.15.1 Compass fails
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.
Check:
Inspect the compass chip on the Relay FPC Assy.
Action:
1. If the compass chip is damaged – replace the Relay FPC
Assy.
2. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
32(70)
Company Internal
Problem Areas
1.16 Accelerometer
1.16.1 Accelerometer test fails
Action:
1. Follow the 1262-6643 Trouble Shooting Application –
mechanical to run the Accelerometer Calibration.
2. Replace Main PBA.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
33(70)
Company Internal
Problem Areas
1.17 Gyroscope
1.17.1 Gyroscope test fails
Action:
1. Follow the 1262-6643 Trouble Shooting Application –
mechanical to run the Gyroscope Calibration.
2. Replace Main PBA.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
34(70)
Company Internal
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.
Troubleshooting Guide (mech)
2. If scratched or damaged – replace the Display Frame
Assy.
Check:
Inspect the BtB connector of Top 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 BtB connector or Top FPC Assy is damaged –
replace the Top FPC Assy.
1286-9334 Rev 2
Sony Mobile Communications AB –
35(70)
Company Internal
Problem Areas: Ambient Light Sensor
Check:
Inspect the sensor on the Top FPC Assy.
Action:
1. If dirty or clogged – clean it.
Troubleshooting Guide (mech)
2. If damaged – replace the Top FPC Assy.
3. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
36(70)
Company Internal
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.
Troubleshooting Guide (mech)
2. If scratched or damaged – replace the Display Frame
Assy.
Check:
Inspect the BtB connector of Top 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 BtB connector or FPC of Top FPC Assy is damaged
– replace the Top FPC Assy.
1286-9334 Rev 2
Sony Mobile Communications AB –
37(70)
Company Internal
Problem Areas: Proximity Switch
Check:
Inspect the proximity sensor and proximity switch on the Top
FPC Assy.
Action:
1. If dirty or clogged – clean it.
Troubleshooting Guide (mech)
2. If damaged – replace the Top FPC Assy.
3. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
38(70)
Company Internal
Problem Areas
1.20 Pressure Sensor
1.20.1 Pressure Sensor test fails
Replace Main PBA.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
39(70)
Company Internal
Problem Areas
1.21 Water Resistance
1.21.1 Water Resistance fails
Check:
Inspect the Cap SIM.
Action:
1. If dirty – clean it.
2. If not properly assembled – disassemble and reassemble.
Troubleshooting Guide (mech)
3. If the Cap SIM is damaged – replace it.
Run the Water Resistance Test again!
Check:
Inspect the Cap USB.
Action:
1. If dirty – clean it.
2. If not properly assembled – disassemble and reassemble.
3. If the Cap USB is damaged – replace it.
Run the Water Resistance Test again!
1286-9334 Rev 2
Sony Mobile Communications AB –
40(70)
Company Internal
Problem Areas: Water Resistance
Check:
Inspect the Cap SD.
Action:
1. If dirty – clean it.
2. If not properly assembled – disassemble and reassemble.
3. If the Cap SD is damaged – replace it.
Run the Water Resistance Test again!
Troubleshooting Guide (mech)
Check:
Inspect the Top FPC Assy.
Action:
If not properly assembled or damaged – replace Adhesive
Audio Jack and then reassemble the Top FPC Assy.
Run the Water Resistance Test again!
1286-9334 Rev 2
Sony Mobile Communications AB –
41(70)
Company Internal
Problem Areas: Water Resistance
Check:
Inspect the Magnetic charger connector.
Action:
If not properly assembled or damaged – replace it.
Run the Water Resistance Test again!
Troubleshooting Guide (mech)
Check:
Inspect the film for water resistance check.
Action:
If damaged – replace the Display Frame Assy.
Run the Water Resistance Test again!
1286-9334 Rev 2
Sony Mobile Communications AB –
42(70)
Company Internal
Problem Areas: Water Resistance
Check:
Inspect the Top Speaker.
Action:
If damaged – replace the Top Speaker and Adhesive Top
Speaker.
Run the Water Resistance Test again!
Troubleshooting Guide (mech)
Check:
Inspect the secondary microphone mesh.
Action:
If damaged – replace the Display Frame Assy.
Run the Water Resistance Test again!
1286-9334 Rev 2
Sony Mobile Communications AB –
43(70)
Company Internal
Problem Areas: Water Resistance
Check:
Inspect loudspeaker sealing rubber on the Antenna Speaker
Box Assy.
Action:
1. If dirty – clean it.
2. If Antenna Speaker Box Assy is not properly assembled –
disassemble and reassemble.
3. If the loudspeaker sealing rubber is damaged – replace
the Antenna Speaker Box Assy.
Run the Water Resistance Test again!
Troubleshooting Guide (mech)
Check:
Inspect primary microphone mesh on the Display Frame
Assy and its adhesive on the Carrier Holder Main Mic.
Action:
1. If Carrier Holder Main Mic is not properly assembled or
damaged – replace the Carrier Holder Main Mic.
1286-9334 Rev 2
Sony Mobile Communications AB –
44(70)
Company Internal
Problem Areas: Water Resistance
Troubleshooting Guide (mech)
2. If the
Display Frame Assy
primary microphone mesh
.
is damaged – replace
Run the Water Resistance Test again!
Check:
Inspect the edge of Display Frame Assy for damage and
gap.
Action:
1. If the edge of Display Frame Assy has gap – replace it.
2. If the Display Frame Assy is damaged – replace it.
Run the Water Resistance Test again!
Check:
Inspect the edge of Back Panel Assy for damage and gap.
1286-9334 Rev 2
Sony Mobile Communications AB –
45(70)
Company Internal
Problem Areas: Water Resistance
Action:
1. If the edge of Back Panel Assy has gap – reassembly it.
2. If damaged – replace it.
Run the Water Resistance Test again!
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
46(70)
Company Internal
Problem Areas
1.22 Real Time Clock
1.22.1 Real time clock test fails
Action:
Replace Main PBA.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
47(70)
Company Internal
Problem Areas
1.23 Total call time
1.23.1 Total call time fails
Action:
Replace Main PBA.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
48(70)
Company Internal
Problem Areas
1.24 External Memory
1.24.1 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)
1286-9334 Rev 2
Sony Mobile Communications AB –
49(70)
Company Internal
Problem Areas
1.25 Security
1.25.1 Security fails
Action:
Replace Main PBA.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
50(70)
Company Internal
Problem Areas
1.26 FM Radio
1.26.1 No/Poor FM Radio reception
Check:
Inspect the external port of the Top FPC Assy.
Action:
1. If dirty or oxidized – clean it.
Check:
Inspect the BtB connector of Top 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 BtB connector or FPC of Top FPC Assy is damaged
– replace the Top FPC Assy.
4. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
51(70)
Company Internal
Problem Areas
1.27 Battery Health test
1.27.1 Battery Health test fails
N/A.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
52(70)
Company Internal
Problem Areas
1.28 Flip Slider Counter
1.28.1 Flip Slider Counter fails
N/A. Not slider phone.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
53(70)
Company Internal
Problem Areas
1.29 Verify Certificates
1.29.1 Verify Certificates fails
Action:
N/A.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
54(70)
Company Internal
Problem Areas
1.30 IrDA Test
1.30.1 IrDA test fails
N/A. No IrDA functionality in the phone.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
55(70)
Company Internal
Problem Areas
1.31 TV-Out Test
1.31.1 TV-Out test fails
Check:
Inspect the USB connector.
Action:
1. If dirty or oxidized – clean the connector.
2. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
Troubleshooting Guide (mech)
56(70)
Company Internal
Problem Areas
1.32 Network & Signal
1.32.1 No/Poor signal
Check:
Inspect the main antenna film on the Antenna Speaker Box
Assy.
Troubleshooting Guide (mech)
Action:
If damaged – replace the Antenna Speaker Box Assy.
Check:
Inspect the contact pads on the Antenna Speaker Box Assy
and the contact pins on PBA Sub.
Action:
1. If dirty or oxidized – clean the pads and pins.
2. If the contact pads are damaged – replace the Antenna
Speaker Box Assy.
1286-9334 Rev 2
Sony Mobile Communications AB –
57(70)
Company Internal
Problem Areas: Network & Signal
3. If the contact pins are damaged – replace the PBA Sub.
Check:
Inspect the RF connector of RF Cable to the PBA Sub.
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 PBA Sub is damaged – replace
PBA Sub.
4. If the RF cable is damaged – replace the RF cable.
1286-9334 Rev 2
Sony Mobile Communications AB –
58(70)
Company Internal
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.
Troubleshooting Guide (mech)
3. If the RF cable is damaged – replace the RF cable.
4. If the connector on the main PBA is damaged – replace
Main PBA.
Check:
Inspect the Diversity antenna contact pads on Display
Frame Assy and the contact pins on Main PBA.
Action:
1. If dirty or oxidized – clean the pads and pins.
1286-9334 Rev 2
Sony Mobile Communications AB –
59(70)
Company Internal
Problem Areas: Network & Signal
2. If the Diversity antenna contact pads are damaged –
replace the Display Frame Assy.
3. If the contact pins on main PBA is damaged – replace
Main PBA.
Troubleshooting Guide (mech)
Check:
Inspect the 2
nd
GSM antenna film on the Antenna Speaker
Box Assy.
Action:
If damaged – replace the Antenna Speaker Box Assy.
1286-9334 Rev 2
Sony Mobile Communications AB –
60(70)
Company Internal
Problem Areas: Network & Signal
Check:
Inspect the contact pad on the Antenna Speaker Box Assy
and contact pin on the Relay FPC Assy.
Action:
1. If dirty or oxidized – clean the pin and pad.
Troubleshooting Guide (mech)
2. If the contact pad is damaged – replace the Antenna
Speaker Box Assy.
3. If the contact pin is damaged – replace the Relay FPC
Assy.
Check:
Inspect the RF connector of RF LCP FPC Assy to the Relay
FPC Assy.
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 –
61(70)
Company Internal
Problem Areas: Network & Signal
3. If the connector on the Relay FPC Assy is damaged –
replace Relay FPC Assy.
Troubleshooting Guide (mech)
4. If the connector of RF LCP FPC Assy is damaged –
replace the RF LCP FPC Assy.
Check:
Inspect the RF connector of RF LCP FPC Assy 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 LCP FPC Assy is damaged – replace it.
1286-9334 Rev 2
Sony Mobile Communications AB –
62(70)
Company Internal
Problem Areas: Network & Signal
4. If the connector on the main PBA is damaged – replace
Main PBA.
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
63(70)
Company Internal
Problem Areas
1.33 SIM
1.33.1 SIM not detected
Check:
Inspect the external port of the SIM card holder and check if
a SIM card can be properly inserted.
Action:
If dirty or clogged – clean the external port.
Troubleshooting Guide (mech)
Check:
Inspect the SIM Tray.
Action:
1. If the SIM Tray is damaged – Replace it.
Check:
Inspect the SIM card holder on Main PBA.
Action:
1. If dirty or clogged – clean the holder.
2. Replace Main PBA.
1.33.2 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.
1286-9334 Rev 2
Sony Mobile Communications AB –
64(70)
Company Internal
Problem Areas
1.34 Charging
1.34.1 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.
1.34.2 Battery will not charge by
charge pad
Check:
Inspect the external port of the Magnetic Connector.
Action:
If dirty or oxidized – clean it.
1286-9334 Rev 2
Sony Mobile Communications AB –
65(70)
Company Internal
Problem Areas: Charging
Check:
Inspect the BtB connector of the Charge FPC Assy 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.
3. If the BtB connector or FPC of the Charge FPC Assy is
damaged – replace the Charge FPC Assy.
Troubleshooting Guide (mech)
Check:
Inspect the contact pins on Charge FPC Assy and pads on
Magnetic Connector.
Action:
1. If dirty or oxidized – clean the pins and pads.
2. If the contact pads of Magnetic connector are damaged –
replace the Magnetic connector.
1286-9334 Rev 2
Sony Mobile Communications AB –
66(70)
Company Internal
Problem Areas: Charging
3. If the contact pins of the Charge FPC Assy are damaged
– replace the Charge FPC Assy.
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 the Battery is
damaged – replace the Battery.
4. Replace Main PBA.
1286-9334 Rev 2
Sony Mobile Communications AB –
67(70)
Company Internal
Problem Areas
1.35 HandsFree by Wire
1.35.1 Connection to portable
Handsfree fails
Check:
Inspect the external port of the Top FPC Assy.
Action:
1. If dirty or oxidized – clean it.
Check:
Inspect the BtB connector of Top 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 BtB connector of Top FPC Assy or FPC is damaged
– replace the Top FPC Assy and then follow 1262-6643
Trouble Shooting Application – mechanical to run the Noise
Cancelling Calibration.
4. Replace Main PBA and then follow 1262-6643 Trouble
Shooting Application – mechanical to run the Noise
Cancelling Calibration.
1286-9334 Rev 2
Sony Mobile Communications AB –
68(70)
Company Internal
Problem Areas
1.36 Data Communication
1.36.1 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)
1286-9334 Rev 2
Sony Mobile Communications AB –
69(70)
Company Internal
Rev.
Date
Changes
/ Comments
2 Revision History
1 2014-Apr-01 Initial release
2 2014-Apr-25 Added L50u
Troubleshooting Guide (mech)
1286-9334 Rev 2
Sony Mobile Communications AB –
70(70)
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