Sony XPERIA ST25i Troubleshooting Manual
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Sony XPERIA ST25i Troubleshooting Manual

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Troubleshooting Guide
- mechanical -
ST25i, ST25a
1263-4091 Rev 4
© Sony Mobile Communications AB – Company Internal

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  • Page 1 Troubleshooting Guide - mechanical - ST25i, ST25a 1263-4091 Rev 4 © Sony Mobile Communications AB – Company Internal...

  • Page 2: Table Of Contents

    Light Sensor malfunctions ............... 30     1.17 Proximity switch .................. 31     1.17.1   Proximity switch malfunctions ..............31   1.18 Real time clock ..................32     1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 2(46)
  • Page 3 Connection to Portable HandsFree fails ..........43   1.27 Data Communication ................45     1.27.1   Data transfer via System Connector fails ..........45   Revision History ................46     1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 3(46)

  • Page 4: Problem Areas

    2. If adhesive is detected on the contact pins, use an eraser to gently rub off the adhesive. 3. If damaged – Replace board. Check: Inspect the on/off key. Action: 1. Refer to section 1.2.4 ‘On/Off key’. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 4(46)

  • Page 5: Keys

    2. If the camera key is damaged – replace the Battery Cover Assy. Check: Inspect the camera input switch on the Main PBA. Action: 1. If dirty or clogged – clean it. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 5(46)

  • Page 6: Volume Key

    1. If dirty or clogged – clean them. 2. Replace board. 1.2.4 On/Off Key Check: Inspect the on/off key on the Battery Cover Assy. Action: 1. If dirty or clogged – clean it. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 6(46)
  • Page 7 2. If the on/off key is damaged – replace the Battery Cover Assy. Check: Inspect the on/off input switch on the Main PBA. Action: 1. If dirty or clogged – clean it. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 7(46)

  • Page 8: Touch Screen

    Inspect the BtB connector of the Display FPC to the PBA. Action: 1. If not properly connected – disconnect and reconnect. 2. If dirty or oxidized – clean the both sides of the BtB connector. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 8(46)
  • Page 9 Trouble Shooting Guide Repair Instruction Mechanical Problem Areas :Touch Screen 3. If the ZIF connector, the BtB connector or FPC of the Display is damaged – replace the Display. 4. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 9(46)

  • Page 10: Display

    2. If dirty or oxidized – clean the both sides of the BtB connector. 3. If the BtB connector or FPC of the Display is damaged – replace the Display. 4. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 10(46)

  • Page 11: Led/Illumination

    2. If the window is damaged – replace the Touch Panel. Check: Inspect the Notification LED on the PBA. Action: 1. If dirty or clogged – clean it. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 11(46)

  • Page 12: Transparent Belt Illumination

    2. If the illumination window is damaged – replace the Transparent Belt Total assy. Check: Inspect the LED on the PBA. Action: 1. If dirty or clogged – clean it. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 12(46)

  • Page 13: Speaker

    Inspect the Loudspeaker’s mesh on the Carrier Frame Assy. Action: 1. If clogged – clean the speaker mesh. 2. If the mesh is damaged – replace the Carrier Frame Assy. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 13(46)
  • Page 14 Inspect the Loudspeaker’s pins and the pads on the Main PBA. Action: 1. If dirty – clean them. 2. If the Loudspeaker is damaged – replace the Loudspeaker. 3. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 14(46)

  • Page 15: Earphone

    Inspect the Ear Speaker pins and the pads on the Main PBA. Action: 1. If dirty – clean them. 2. If the Ear Speaker is damaged – replace the Ear Speaker. 3. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 15(46)

  • Page 16: Microphone

    Check: Inspect the Microphone‘s port on the Antenna Main. Action: 1. If clogged – clean the port. 2. If the Antenna Main is damaged – replace the Antenna Main. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 16(46)
  • Page 17 Check: Inspect the Transparent Belt Total Assy. Action: 1. If the Microphone mesh or its ZIF connector is damaged – replace the Transparent Belt Total Assy. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 17(46)

  • Page 18: Secondary Microphone

    Inspect the Microphone‘s mesh port on the Carrier Frame Assy. Action: 1. If clogged – clean the port. 2. If the Microphone‘s mesh port is damaged – replace the Carrier Frame Assy. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 18(46)
  • Page 19 Trouble Shooting Guide Repair Instruction Mechanical Problem Areas: Microphone Check: Inspect the Secondary Microphone on the Main PBA. Action: 1. If clogged – clean the port. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 19(46)

  • Page 20: Vibrator

    Trouble Shooting Guide Repair Instruction Mechanical Problem Areas: Vibrator Vibrator 1.9.1 Vibrator not generating alerts Check: Inspect the vibrator on the Main PBA. Action: Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 20(46)

  • Page 21: Camera

    If the Main Camera Film is assembled as shown or missing. Action: 1. If missing or damaged – replace the Main Camera Film. Make sure Main Camera Film is assembled to cover two soldering pads! 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 21(46)
  • Page 22 Trouble Shooting Guide Repair Instruction Mechanical Problem Areas Action: 1. If damaged – replace the Main Camera. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 22(46)

  • Page 23: Secondary Camera

    Inspect the Sub Camera Rubber. Action: 1. If dirty or clogged – clean it. 2. If not properly mounted – remount it. 3. If damaged – replace it. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 23(46)
  • Page 24 Trouble Shooting Guide Repair Instruction Mechanical Check: Inspect the Secondary Camera on the Main PBA. Action: 1. If dirty or clogged – clean it. 2. Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 24(46)

  • Page 25: Flash Led

    2. If scratched or damaged – replace the Carrier Frame Assy. Check: Inspect the flash LED on the Main PBA. Action: 1. If dirty – clean it. 2. Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 25(46)

  • Page 26: Bluetooth And W-Lan Malfunctions

    1. If dirty or oxidized – clean the pads and pins. 2. If the antenna or pads are damaged – replace the Carrier Frame Assy. 3. Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 26(46)

  • Page 27: Gps

    1. If dirty or oxidized – clean the pads and pins. 2. If the antenna or pads are damaged – replace the Carrier Frame Assy. 3. Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 27(46)

  • Page 28: Compass

    Trouble Shooting Guide Repair Instruction Mechanical 1.14 Compass 1.14.1 Compass fails Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 28(46)

  • Page 29: Accelerometer

    Trouble Shooting Guide Repair Instruction Mechanical 1.15 Accelerometer 1.15.1 Accelerometer test fails Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 29(46)

  • Page 30: Ambient Light Sensor

    Inspect the Audio Jack Sensor FPC Assy. Action: 1. If the Audio Jack Sensor FPC Assy or its BtB connector is damaged – replace the Audio Jack Sensor FPC Assy. 2. Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 30(46)

  • Page 31: Proximity Switch

    Inspect the Audio Jack Sensor FPC Assy Action: 1. If the Audio Jack Sensor FPC Assy or its BtB connector is damaged – replace the Audio Jack Sensor FPC Assy. 2. Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 31(46)

  • Page 32: Real Time Clock

    Trouble Shooting Guide Repair Instruction Mechanical 1.18 Real time clock 1.18.1 Real time clock test failed Action: Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 32(46)

  • Page 33: Total Call Time

    Trouble Shooting Guide Repair Instruction Mechanical 1.19 Total call time 1.19.1 Total call time failed Action: Replace board. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 33(46)

  • Page 34: Storage

    Be careful that all the user data on internal storage will be erased completely after selecting "clear internal Storage". 1.20.2 USB otg Storage failed Refer to section 1.28 ‘Data Communication’. Problem Areas 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 34(46)

  • Page 35: Security

    Trouble Shooting Guide Repair Instruction Mechanical 1.21 Security 1.21.1 Security failed Action: Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 35(46)

  • Page 36: Fm Radio

    Audio Jack Sensor FPC Assy. Action: 1. If dirty or oxidized – clean the pads and pins. 2. If the pins are damaged – replace the Audio Jack. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 36(46)
  • Page 37 Inspect the Audio Jack Sensor FPC Assy. Action: 1. If the pads or the connector of the Audio Jack Sensor FPC Assy is damaged – replace the Audio Jack Sensor FPC Assy. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 37(46)

  • Page 38: Network & Signal

    Inspect the contact pads on the Transparent Belt Total Assy and the contact pins on the Main PBA. Action: 1. If dirty or oxidized – clean the pads and pins. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 38(46)
  • Page 39 Trouble Shooting Guide Repair Instruction Mechanical Problem Areas 2. If the pins on the Transparent Belt Total Assy are damaged – replace the Transparent Belt Total Assy. 3. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 39(46)

  • Page 40: Sim

    SIM card adapter will damage the SIM card connector! Action: 1. Use a proper ST25 SIM-Card adapter (1257-9796). 2. If SIM Card connector is damaged, deal with it according to local directive. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 40(46)

  • Page 41: Charging

    Inspect the USB connector. Action: If dirty or oxidized – clean it. Check: Inspect the USB connector. Action: 1. If dirty or oxidized – clean it. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 41(46)
  • Page 42 Trouble Shooting Guide Repair Instruction Mechanical Problem Areas: Charging Check: Inspect the USB connector on the Main PBA. Action: 1. If dirty or oxidized – clean the connector. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 42(46)

  • Page 43: Handsfree By Wire

    Audio Jack Sensor FPC Assy. Action: 1. If dirty or oxidized – clean the pads and pins. 2. If the pins are damaged – replace the Audio Jack. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 43(46)
  • Page 44 Inspect the Audio Jack Sensor FPC Assy. Action: 1. If the pads or the connector of the Audio Jack Sensor FPC Assy is damaged – replace the Audio Jack Sensor FPC Assy. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 44(46)

  • Page 45: Data Communication

    If dirty or oxidized – clean the connector. Check: Inspect the USB connector on the Main PBA. Action: 1. If dirty or oxidized – clean the connector. 2. Replace board. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 45(46)

  • Page 46: Revision History

    Initial release 2012-Apr-18 Update main camera trouble shooting. 2012-Apr-20 Update main camera trouble shooting to check Main Camera Film. 2012-06-05 Chapter of Incorrect SIM-Card adapter is added at page 40. 1263-4091 Rev4 © Sony Mobile Communications AB – Company Internal 46(46)

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Xperia st25a

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