Sony XPERIA ST27i Troubleshooting Manual page 31

Problem Areas: Proximity switch
Check:
Inspect the Proximity Sensor on the Main PBA.
Action:
1. If dirty – clean it.
2. Replace board, then – Calibrate the P-sensor 1262-6643
Trouble Shooting Application – mechanical
1265-6294 Rev 4
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Troubleshooting Guide (mech)
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