Network & Signal; No/Poor Signal - Sony Xperia Z1 Troubleshooting Manual

Problem Areas
1.32 Network & Signal

1.32.1 No/Poor signal

Check:
Inspect the RF connector of RF Cable B to the PBA Cellular
Sub.
Action:
1. If not properly connected – disconnect and reconnect it.
2. If dirty or oxidized – clean it.
Action:
If the RF connector of the PBA Cellular Sub is damaged –
replace the PBA Cellular Sub.
Check:
Inspect the antenna on Main Frame Assy and the contact
pins on PBA Cellular Sub.
Action:
1. If dirty or oxidized – clean the antenna and pins.
2. If the contact pins are damaged – replace the PBA
Cellular Sub.
1277-9814 Rev 2
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Sony Ericsson Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
54(63)