Ambient Light Sensor; Light Sensor Malfunctions - Sony Xperia TX LT29i Working Instructions

Problem Areas

1.18 Ambient Light Sensor

1.18.1 Light Sensor malfunctions

Check:
Inspect the external window area of light sensor on the
Cover Front Assy.
Action:
1. If clogged – clean it.
2. 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 light sensor on the RCV Flex FPC.
Action:
1. If dirty – clean it.
2. If the light sensor or the BtB connector of the RCV Flex
FPC is damaged – replace the RCV Flex FPC.
3. Replace board.
1266-5087 Rev 1
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
34(57)