Nokia NPE-4 Service Manual page 21

Customer Care Europe & Africa
SCCE Training Group
Flowchart No Service
Set phone to Local
Mode with Phoenix
and check with HF
Probe TX spectrum at
R805 (GSM900) and
R819 (GSM1800/1900
- difficult to measure)
Check cable
connection
OK
between phone
and e.g.
CMD/Wavetec
UEM D200 faulty.
Change PWB
© NMP 2002
No Service
Drop calls
No TX 1800/1900
Insert TestSim into phone and
establish a connection at all
GSM Bands with e.g.
CMD/Wavetec. Make a call and
find out, which Band is faulty
all GSM Bands
nOK
TX
Spectrum
ok?
nOK
Tune TX I/Q and
TX power
following signals and
voltages: VIO=1.8VDC at R630
VR1A=4.7VDC at R623, VR2=2.8VDC at C622
nOK
VR3=2.8VDC at R610, VR4=2.8VDC at C296
VR5=2.8V at R628, VR7=2.8VDC at C299
TX I/Q at C715/C716 on both sides
CONFIDENTIAL
NPE-4 6310/NPL-1 6310i
Date 15.08.2002
GSM 1800/1900 not ok.
Call in
Set Phone to TX-Mode
nOK
GSM 1800 1747.8MHz,
possible?
Ch. 700, Powerlevel 15
OK
Bit
VAPC_DCS signal
error rate
at R821 with
ok?
oscilloscope
OK
TX
Spectrum OK
ok?
nOK
Check
All signals ok?
Checked by:
SCCE Training Group
Repairhints
Version 1.0 Approved
and 0
Check
Check N801
Power
OK
Amplifier
nOK
Phone ok
Change N601
OK
Mjoelner
Approved by:
SCCE
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