Receiver Dc Test Points - Nokia 6255 Rf Description And Troubleshooting

Nokia Customer Care

Receiver DC Test Points

1
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.
Test
Point
1
2
3
4
5
6
7
Issue 2 05/2005
Table 9: Receiver DC Test Point Values
Description
Rx LO lock voltage
LO Vdd
RFA Vdd
C_LNA Vdd
P_LNA Vdd
IFA Vdd
IFA Vdd
©2005 Nokia Corporation
6255/6255i/6256/6256i (RM-19)
RF Description and Troubleshooting
7
6
2
Value
1.2 to 1.7 Vdc
2.6 VDC LO Amp supply lines
for Cell and PCS
2.8 VDC RF Amp Vdd supply
line for Cell band
2.8 VDC external VDd supply
line for Cell LNA
2.8 VDC external Vdd supply
line for PCS LNA
2.8 VDC IF Amp Vdd supply line
for CDMA and AMPS IFs
2.8 VDC IF Amp Vdd supply line
for CDMA and AMPS IFs
Company Confidential
4
5
3
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