TROUBLESHOOTING
GSM Network Problems - WCDMA Network Problems
SEMC Troubleshooting Manual
K630 - V640 - K660
GSM Network problems
WCDMA Network problems
Connect Mobile Phone
Yes
Load the ITP SW
into the phone.
Use fixture
Connect 3.8V
Limiter 2A
Use
Fault Trace SW
2.8 Volt DC
at MP 36 (R2202
VccA)
0 Ohm between
MP 85 (R1208) and
MP 81 (R1202)
Tester
Instrument Settings:
System Mode:
TX/RX Tester Mode (GSM)
GSM BAND: GSM850
RF Power ON: -60 dBm
Correction: -1.6 dBm
Measurement Mode:
Repeat, CW
Fault Trace SW
TX and RX GSM
GSM Mode Settings:
RX Switched
GSM Radio Settings:
Select Band :GSM 850
Channel: 128
GSM RSSI Measurements:
Start RSSI Test
SL 5 Replace
N2000
SL 4 Escalate
No
No
Replace
X1200
RSSI Test
Passed
No
Is
Max Pwr 23dBm
Ok
(
±3
dBm)
No
Perform RSSI Test at
GSM 900, 1800 and 1900 Band
Instrument Settings
System Mode:
TX/RX Tester Mode (GSM)
GSM BAND:
E-GSM 900, Channel 124
E-GSM 900, Channel 975
DCS 1800, Channel 512
PCS 1900, Channel 512
RF Power ON: -60 dBm
Correction: -1.6 dBm
Measurement Mode:
Repeat,CW
Yes
All Bands
Passed
RSSI Test
Replace
N1200 Thor
Fault Trace SW
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band : GSM 850
Channel : 128
Power Level: 5
Is
measured value
33dBm
(
±3
dBm)
Is
measured value
±
5
dBm
Go to
SERP Calibration
Instrument Settings:
System Mode:
TX/RX Tester Mode
(GSM)
GSM BAND: DCS1800
Measurement Mode:
Repeat, Burst
Correction: 1.6 dB
Fault Trace SW
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band : GSM 1800
Channel : 512
Power Level: 0
1.4V-1.6V
Pk-Pk pulses at
MP 93 (R1000
VAPC)
No
Replace
N1200 Thor
No
No
No
Yes
Yes
Instrument Settings:
System Mode:
TX/RX Tester Mode (GSM)
GSM BAND: GSM850
Measurement Mode:
Repeat, Burst
Correction: 1.6 dB
Instrument
Settings:
System Mode:
TX/RX Tester Mode
(WCDMA)
Downlink Channel:
10562
Measurement
Mode: Repeat
Correction: 1.6 dB
Yes
Is the
measured value
30dBm
(
±3
dBm)
Yes
Go to
WCDMA Network
problems
Spectrum Analyzer
Instrument settings
Measure with RF
Probe
TX Freq. 824.2MHz
Span: 300KHz,
Amplitude: -5dBm
Is
measured value
±
5
dBm
No
Yes
Fault Trace SW
Switch GSM Mode
Settings to:
TX Static
Yes
Signal at
MP 91 (Z1001)
-10dBm
(
±
5
dBm)
Yes
K630/V640:
SL 5 Replace N1002
SL 4 Escalate
K660:
Replace N1002
(Inside Thor)
Fault Trace SW
Switch GSM Mode
Settings to:
TX Static
Spectrum Analyzer
Instrument settings
Measure with RF
Probe
TX Freq. 1710.2MHz
Span: 300KHZ,
Amplitude: -5dBm
Signal at
MP 90 (L1006)
-12dBm
(
±5
dBm)
No
No
No
Replace
N1200 Thor
Go to
SERP Calibration
Yes
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band:
BAND I
Fast Select
Channels:
Ch LOW
Modes:
Max Pwr 23dBm
Yes
START
Yes
1215-3608 rev. 1
No
Load ITP SW
into the phone.
Use TRS Fixture
Connect:
VBATT: 3.8V, Limiter 3A
DCIO/SEPI: 5V, Limiter 2A
Use Fault Trace SW
START
0 Ohm
between
MP 85 (R1208) and
MP 81 (R1202)
Replace
X1200
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast Select Channels:
Ch LOW
Modes: Max Pwr 23dBm
3.1V-3.3V DC at
MP 56 (L2207
VCC_WPA)
3.4V-3.8V DC at
MP 57 (R2210
VBATI)
No
1.8Volt
DC at MP 55
(R2299 DCDC_EN)
And 1.8V at MP 60 (C417
WPA0_EN)
(squid)
Yes
SL 5 Replace
D2000
SL 4 Escalate
No
Instrument Settings:
System Mode:
TX/RX Tester Mode
WCDMA
Downlink Channel:
BAND I: 10562
Measurement Mode:
Repeat
Correction: 1.6 dB
SL 5 Replace
R2210
SL 4 Escalate
1.2V-1.8V DC at
MP 54 (R2221
WPAVCC)
Yes
No
Replace
N2205
Yes
Max Pwr.
23dBm
Ok
(
±3
dBm)
Yes
Current
consumption
between
450 – 650 mA
No
Replace
N1200
Yes
Replace
N1210
No
Instrument Settings:
System Mode:
TX/RX Tester Mode
WCDMA
Downlink Channel:
BAND I: 10700
Measurement Mode:
Repeat
RF Power ON: -60 dBm
Correction: - 1.6 dBm
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band : Band I
Fast select channels:
Ch MID
Modes: Read RSSI
RX On:
Read Measurement
Yes
Phone report
correct value
(
±5
dBm)
No
Go to
GO-NOGO
Test
Yes
Are any of
X1201,X1202, X1203
X1001,X1002,X1003
damaged
Yes
Replace
Faulty Component
No
Yes
2.7V-2.8V at
MP 36 (R2202 VccA)
1.8V at MP 33 (ST2208
VDDE18)
SL 5 Replace
N2000
SL 4 Escalate
No
26MHz at
MP 62 (C511 WBCLK)
(inside Squid)
Yes
Replace
N1200
No
Yes
Replace
N1210
Go to
SERP Calibration
Go to
SERP Calibration
Go to
SERP Calibration
No
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