User Guide

Nokia Customer Care RF Description and Troubleshooting
6255/6255i/6256/6256i (RM-19)
Issue 2 05/2005 ©2005 Nokia Corporation Company Confidential Page 43
Receiver DC Test Points
Figure 35: Receiver DC troubleshooting test points on the bottom side of the main PWB
Table 9 includes the descriptions and values for the Rx DC test points from Figure 35.
Table 9: Receiver DC Test Point Values
Test
Point
Description Value
1 Rx LO lock voltage 1.2 to 1.7 Vdc
2 LO Vdd 2.6 VDC LO Amp supply lines
for Cell and PCS
3 RFA Vdd 2.8 VDC RF Amp Vdd supply
line for Cell band
4 C_LNA Vdd 2.8 VDC external VDd supply
line for Cell LNA
5 P_LNA Vdd 2.8 VDC external Vdd supply
line for PCS LNA
6 IFA Vdd 2.8 VDC IF Amp Vdd supply line
for CDMA and AMPS IFs
7 IFA Vdd 2.8 VDC IF Amp Vdd supply line
for CDMA and AMPS IFs
1
6
7
3
2
5
4