Nokia 6235 Troubleshooting Manual page 3

Nokia Customer Care
VCTCXO Manual Tuning ...........................................................................................................................48
AFC Voltage Troubleshooting .................................................................................................................49
UHF Synthesizer Schematic ....................................................................................................................52
UHF Synthesizer Troubleshooting .........................................................................................................52
UHF Synthesizer Test Points ...................................................................................................................54
Typical UHF LO Spectrum Outputs .......................................................................................................54
Rx VHF LO (N7100) Schematic ..............................................................................................................56
Rx VHF LO Troubleshooting ....................................................................................................................57
Tx UHF LO (N7000) Schematic ..............................................................................................................58
Tx UHF LO (N7000) Troubleshooting ....................................................................................................59
Typical Transmitter UHF LO Spectrum Outputs ................................................................................59
GPS Troubleshooting................................................................................................................................... 60
GPS RF Block Diagram .............................................................................................................................60
GPS RF Schematic .....................................................................................................................................61
GPS Troubleshooting Setup ....................................................................................................................61
Self Test Failure ...................................................................................................................................... 63
Oscillator Failure.................................................................................................................................... 63
CW Test Failure....................................................................................................................................... 63
GPS RF Troubleshooting....................................................................................................................... 63
GPS DC Test Points ................................................................................................................................ 64
GPS RF Test Points................................................................................................................................. 65
FM Radio Troubleshooting ........................................................................................................................ 65
FM Radio Schematic .................................................................................................................................65
FM Radio Troubleshooting Setup ..........................................................................................................66
FM Radio Part Layouts and Probe Points ...........................................................................................66
Issue 1 04/2005
©2005 Nokia Corporation
6235/6235i/6236i (RM-60)
RF Description and Troubleshooting
Company Confidential Page 3