Troubleshooting Guide (mech)
1261-4721 Rev 3
Sony Mobile Communications AB
– Company Internal
38(62)
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.
Note: Ensure the BtB connector of battery is
disconnected in the following steps!
Check:
Inspect the both sides of the ZIF connector on the Main PBA
and the FPC Top Flex.
Action:
1. If not properly connected
– disconnect and reconnect.
2. If dirty or oxidized
– clean it.
Check:
Inspect the light sensor on the FPC Top Flex.
Action:
1. If dirty
– clean it.
2. If the light sensor or the connector is damaged
– replace
the FPC Top Flex.
3. Replace board.