Sony Xperia Z1 Troubleshooting Manual page 55

Problem Areas: Network & Signal
Check:
Replace the Main PBA with a known working one and test
the network.
Action:
1. If the network is still not working – replace the Main
Frame Assy.
Check:
Inspect the RF connector of RF Cable B to the Main PBA.
Action:
1. If not properly connected – disconnect and reconnect it.
2. If dirty or oxidized – clean it.
Action:
1. If the RF Cable B is damaged – replace the RF Cable B.
Check:
Inspect the antenna on Main Frame Assy and the contact
pins on Main PBA.
Action:
1. If dirty or oxidized – clean the pads and pins.
1277-9814 Rev 2
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Sony Ericsson Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
55(63)