RM-11
Troubleshooting - RF
Receiver DC Troubleshooting Layout
Measure Logic Levels for Rx Front End (N750)
CELL CDMA HI-GAIN
CELL CDMA LOW-GAIN
PCS CDMA HI-GAIN
PCS CDMA LOW-GAIN
AMPS HI-GAIN
AMPS LOW-GAIN
Note: If logic levels are significantly off (+/- 0.2V), replace N750 and remeasure. If
voltages are still out-of-spec, see the Baseband Description and Troubleshooting
chapter of this manual.
© 2005 Nokia Corporation
Page 58
1 3 2
Modes
BAND (1)
0.1 V
0.1 V
2.68 V
2.68 V
0.1 V
0.1 V
CC Technical Documentation
Logic Inputs Voltages (V)
GAIN_CTL (2)
2.75 V
0 V
2.75 V
0 V
2.76 V
0 V
Confidential
IF_SEL (3)
0 V
0 V
0 V
0 V
2.76 V
2.76 V
Issue 2 09/2005