Nokia NSB-9 Service Manual page 182

NSB-9
Troubleshooting Instructions
Check PA output
signal at TP60
836.6 MHz
Check coupler output
signal at TP61
836.6 MHz
Check TX output
signal at TP30
836.6 MHz
TX is ok
Page 8
Check SDATA at
TP51, SCLK TP52,
SLE TP53
Change
Hagar ASIC
N600
Check PA supply
voltage at TP9
VBATT (∼3.9 VDC)
SA
OSC
Check PA control
voltage at TP27
Change PA
N700
Change
coupler
L750
SA
Check antenna switch
control signal at TP62
2.78 V squarewave
SA
Change
antenna
switch Z500
Nokia Corporation
CCS Technical Documentation
Start baseband
troubleshooting (UPP)
OSC
DMM
Check VBATT path
from battery connector
OSC
Check TXC
signal at TP23
Change
Hagar ASIC
N600
Change Hagar
ASIC
N600
OSC
to PA
Start baseband
troubleshooting
(UEM)
Issue 1 04/03