Troubleshooting Guide (mech)
1261-4721 Rev 3
Sony Mobile Communications AB
– Company Internal
53(62)
Problem Areas
1.32 Network & Signal
1.32.1 No/Poor signal
Check:
Inspect the main antenna on the Frame Rear Assy.
Action:
1. If dirty
– clean it.
2. If the main antenna is damaged
– replace Frame Rear
Assy.
Note: Ensure the BtB connector of battery is
disconnected in the following steps!
Check:
Inspect the main antenna contact pin on the PBA Sub
Antenna Assy and contact pad on the Frame Rear Assy.
Action:
If dirty or oxidized
– clean the pad and pin.
Check:
Inspect the main antenna contact pin on the PBA Sub
Antenna Assy and contact pad on the Frame Rear Assy.
Action:
If dirty or oxidized
– clean the pad and pin.