Network & Signal; No/Poor Signal - Sony Xperia C3 Dual Test Instructions

Problem Areas
1.31 Network & Signal

1.31.1 No/Poor signal

Check:
Inspect the main antenna on the Ant Speaker Bottom Frame
Assy.
Action:
If damaged – replace the Ant Speaker Bottom Frame Assy.
Check:
Inspect the contact pads on the Ant Speaker Bottom Frame
Assy and the contact pins on Sub PBA.
Action:
1. If dirty or oxidized – clean the pads and pins.
2. If the contact pads are damaged – replace the Ant
Speaker Bottom Frame Assy.
1290-1679 Rev 3
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
50(58)