Nokia 6255 Service Manual
Nokia Customer Care
RF Description and Troubleshooting
6255/6255i/6256/6256i (RM-19)
Issue 2 05/2005
©2005 Nokia Corporation Company Confidential
Page 3
Rx VHF LO Troubleshooting ....................................................................................................................59
Tx UHF LO (N7000) Schematic ..............................................................................................................60
Tx UHF LO (N7000) Troubleshooting ....................................................................................................61
Tx UHF LO (N7000) Schematic ..............................................................................................................60
Tx UHF LO (N7000) Troubleshooting ....................................................................................................61
GPS RF Block Diagram .............................................................................................................................62
GPS RF Schematic .....................................................................................................................................63
GPS Troubleshooting Setup ....................................................................................................................64
GPS RF Schematic .....................................................................................................................................63
GPS Troubleshooting Setup ....................................................................................................................64
Self Test Failure...................................................................................................................................... 65
Oscillator Failure.................................................................................................................................... 65
CW Test Failure....................................................................................................................................... 65
GPS RF Troubleshooting....................................................................................................................... 65
GPS DC Test Points................................................................................................................................ 66
GPS RF Test Points................................................................................................................................. 69
Oscillator Failure.................................................................................................................................... 65
CW Test Failure....................................................................................................................................... 65
GPS RF Troubleshooting....................................................................................................................... 65
GPS DC Test Points................................................................................................................................ 66
GPS RF Test Points................................................................................................................................. 69
FM Radio Schematic .................................................................................................................................71
FM Radio Troubleshooting Setup ..........................................................................................................72
FM Radio Troubleshooting Setup ..........................................................................................................72