Nokia 3105 Servicehandbuch
CCS Technical Documentation
Troubleshooting — Antenna
RH-48
Issue 1 11/2003
©2003 Nokia Corporation Confidential
Page 7
Grounding of Display Frame
Figure 8: Display assembly
Note that the display frame is grounded to the PWB through the two top screws. The
grounding of the display frame will impact the radiation performance of the phone. If
the screws are loose, then tighten them. If the screw bosses are stripped, then the chas-
sis will need to be replaced. If the screws are missing, install new ones.
grounding of the display frame will impact the radiation performance of the phone. If
the screws are loose, then tighten them. If the screw bosses are stripped, then the chas-
sis will need to be replaced. If the screws are missing, install new ones.
The middle screws should not touch the metal in the LCD frame, the metal shield over
the keypad, the PWB, or the RF shield. When driving in these screws, be sure to drive
them in straight. If the screws are driven in at an angle, it is much more likely that the
screws will touch the PWB or the RF shield. If this happens, then antenna performance
could change by about 1dB.
the keypad, the PWB, or the RF shield. When driving in these screws, be sure to drive
them in straight. If the screws are driven in at an angle, it is much more likely that the
screws will touch the PWB or the RF shield. If this happens, then antenna performance
could change by about 1dB.