Sony C2104 - Touch Screen; Touch Screen malfunction

Troubleshooting Guide (mech)
1273-2281 Rev2
 Sony Mobile Communications AB –
Company Internal
10(48)
Problem Areas
1.3 Touch Screen
1.3.1 Touch Screen malfunction
Check:
Inspect the touch screen on the Front Housing LCM TP
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 1275-0758 Trouble Shooting
Application – mechanical.
Check:
Inspect the BtB 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.
3. If the touch screen or the TP FPC is damaged – replace
the Front Housing LCM TP Assembly.
4. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.