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Customer Care Europe, Middle East & 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
Spectrum
between phone
and e.g. CMD
Tune TX I/Q and
TX power
UEM D200 faulty.
nOK
Change PWB
©
NMP 2003
No Service
Drop calls
No TX 1800/1900
Insert TestSim into phone and
establish a connection at all
GSM Bands with e.g. CMD. Make
a call and find out, which Band
is faulty
Call in
all GSM Bands
possible?
OK
Bit
nOK
error rate
ok?
TX
ok?
nOK
Spectrum
following signals and
voltages: VIO=1.8VDC at R630
VR1A=4.7VDC at R623, VR2=2.8VDC at C622
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
All signals ok?
CONFIDENTIAL
NPE-4 6310/NPL-1 6310i
Date 22.04.2003
GSM 1800/1900 not ok.
Set Phone to TX-Mode
nOK
GSM 1800 1747.8MHz,
Ch. 700, Powerlevel 15
and 0
Check
VAPC_DCS signal
at R821 with
oscilloscope
OK
TX
OK
Phone ok
ok?
nOK
Check
Checked by:
SCCE Training Group
Repair Hints
Version 3.0 Approved
Check N801
Power
OK
Amplifier
nOK
Change N601
OK
Mjoelner
Approved by:
SCCE
25 (29)
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