Nokia NPD-4 Series Troubleshooting - Gps page 20

NPD-4
Troubleshooting — GPS
Testing/GPS Receiver Control (AMS) / Receiver On in Phoenix
11 Execute
Note: When turning the GPS "ON" for the first time via the Phoenix command, the CDMA engine
will switch to "Local Mode". During this transition the GPS will perform an internal self-test and
may turn the GPS "off " at the end of the self-test. If this is the case, execute the Receiver ON com-
mand again. Looking at the current consumption, you can easily monitor this state.
12 Check operating voltages
DC voltages VRF_GPS at C024 and C015, LNA VCE at L006 and VIO at C018 should be as
presented in the following picture:
Page 20
Figure 12: DC level of LNA Collector Emitter Voltage Vce
Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 02/2003