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

Problem Areas
1.35 Network & Signal

1.35.1 No/Poor signal

Check:
Inspect the main antenna in the lower part of the Cover Main
and its contact pad.
Action:
If the pad is dirty or oxidized – clean it.
Check:
Inspect the pin on the PBA Antenna and RF Coax Cable
connection.
Action:
1. If the pin or the RF connection is oxidized – clean it.
2. If the pin, the RF connection or the PBA Antenna is
damaged – replace the PBA Antenna.
Check:
Inspect the entire RF Coax Cable and its connection to
the Main PBA.
Action:
1. If oxidized – clean it.
2. If the RF Coax Cable isn't properly connected –
disconnect and reconnect.
3. If the RF Coax Cable is damaged – replace it.
4. If the Cover Main is damaged – replace it.
5. Replace the Main PBA.
1273-7035 Rev 3
© Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
39(40)