Rf Tunings; Introduction To Rf Tunings - Nokia 6680 RM-36 Service Manual

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The antenna is functioning normally when the contacts function (RDC = 0 ohm) and the antenna is visually intact.
BT antenna
BT antenna has one Feed and two GND contacts. The antenna is functioning normally when the contacts function
(RDC = 0 ohm) and the antenna is visually intact.

RF tunings

Introduction to RF tunings

Phone RF is tuned in production. There is no reason to do the re-calibration unless:
• One or more of the RF components is changed
• FLASH memory chip (D3000) is changed or otherwise corrupted.
Note: RF calibration is always performed with the help of a product-specific module jig, never with
an RF coupler. Using an RF coupler in the calibration phase will cause a complete mistuning of the RF
side.
Page 7–16
Figure 73 Feed and GND spots of the main antenna
Figure 74 BT antenna
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RF Troubleshooting and Manual Tuning Guide
RM-36
Issue 1