
Troubleshooting Guide (mech)
1279-7185 Rev 1
Sony Mobile Communications AB – Company Internal
55(68)
Problem Areas
1.32 Network & Signal
1.32.1 No/Poor signal
Check:
Inspect the main antenna film on the Main Antenna Speaker
Sub Assy.
Action:
If damaged – replace the Main Antenna Speaker Sub Assy.
Check:
Inspect the contact pads on the Main Antenna Speaker Sub
Assy and the contact pins on PBA Sub.
Action:
1. If dirty or oxidized – clean the pads and pins.
2. If the contact pads are damaged – replace the Main
Antenna Speaker Sub Assy.