Proximity Switch; Proximity Switch Malfunctions - Sony Xperia TX LT29i Working Instructions

Problem Areas

1.19 Proximity Switch

1.19.1 Proximity switch malfunctions

Check:
Inspect the proximity switch window area and the proximity
sensor window area on the Cover Front Assy.
Action:
1. If dirty – clean it.
2. If the end user has complained about unexpected
behavior of the proximity sensor - Calibrate the P-sensor
1262-6643 Trouble Shooting Application – mechanical.
3. If scratched or damaged – replace the Cover Front Assy.
Check:
Inspect the BtB connector of the RCV Flex FPC to the PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
Check:
Inspect the proximity switch and proximity sensor on the
RCV Flex FPC.
Action:
1. If dirty – clean it.
2. If the BtB connector, the proximity switch or the proximity
sensor of the RCV Flex FPC is damaged – replace the RCV
Flex FPC.
3. Replace board.
1266-5087 Rev 1

Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
35(57)