Troubleshooting Guide (mech)
1261-4721 Rev 3
Sony Mobile Communications AB
– Company Internal
39(62)
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 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 proximity switch and proximity sensor on the
FPC Top Flex.
Action:
1. If dirty
– clean it.
2. If the connector, the proximity switch or the proximity
sensor damaged
– replace the FPC Top Flex.
3. Replace board.