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Problem Areas
1.3
Touch Screen
1.3.1 Touch Screen malfunction
Check:
Inspect the touch screen on the Front Cover Display
Assembly.
Action:
If dirty – clean it.
If: The end user has complained about unexpected behavior of the
touch screen or the touch keys.
Action: Calibrate the Touch Panel 1270-6729 Trouble Shooting
Application – mechanical.
Check:
Inspect the ZIF connector of the Front Cover Display
Assembly to the main PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
Check:
Inspect the ZIF connector of the touch panel FPC to the
display FPC.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
3. If the touch screen or the FPC of the Front Cover Display
Assembly is damaged – replace the Front Cover Display
Assembly.
4. Replace board.
Note: Calibrate the Touch Panel 1270-6729 Trouble Shooting
Application – mechanical after replacements of action 3
or action 4.
1268-3899 Rev 3
©
Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
8(44)
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