Problem Areas: Keys
Check:
Inspect the key volume push switch on the FPC Main Assy.
Action:
If (a) or (b) or (c) is dirty or clogged – clean it.
Check:
Check the BtB connector of the FPC Main Assy to the Main
PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean both sides of the BtB
connector.
Check:
Inspect the FPC Main Assy.
Action:
1. If the FPC Main Assy or its BtB connector is damaged –
replace the FPC Main Assy.
2. Replace board.
1.2.4 Key On/Off
Check:
Inspect the Key On/Off on Cover Front Assy.
1257-2931 Rev 6
Sony Mobile Communications AB – Company Internal
Trouble Shooting Guide Repair Instruction Mechanical/
7(57)