C702
1221-7857 rev. 1
TROUBLESHOOTING
WCDMA Network Problems
TROU
B
L
E
S
H
O
OTIN
G
1:
Load ITP SW
into the phone
2:
Use TRS Fixture
Connect:
VBATT: 3.8V, Limiter 3A
DCIO/SEPI: 5V, Limiter 2A
3:
Use Fault Trace SW
START
Note!
Before following this guide
the GSM TX and RX
Network Problems
TRS Guides must be
finished!
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast Select Channels:
Ch LOW
Modes: Max Pwr 23dBm
Instrument Settings:
System Mode:
TX/RX Tester Mode
WCDMA
Downlink Channel:
BAND I: 10562
Measurement Mode:
Repeat
Correction: 1.6 dB
Max Pwr 23dBm
Ok
(
±3
dBm)
Perform
WCDMA
Max Pwr 23dBm
Test
No
Go to
WCDMA Network
Problems RX part
Yes
Is the
current
consumption
between
550 – 700 mA
Replace
N1200
Yes
Go to
SERP Calibration
No
3.1V-3.3V DC at
MP 84 (L2207
VCC_WPA)
Yes
3.7V-3.8V DC at
MP 83 (R2210
VBATI)
No
SL 5 Replace
R2210
SL 4 Escalate
No
1.8Volt
DC at MP 85 (R2299
DCDC_EN)
1.8V at MP 125 (C417
WPA0_EN)
(Squid)
Yes
SL 5 Replace
D2000
SL 4 Escalate
No
1.2V-1.8V DC at
MP 86 (ST2217
WPAVCC)
Yes
SL 4 Replace
N2205
SL 5 Replace
L2207
Yes
26MHz at
MP 126 (C511
WBCLK)
(Squid)
No
Replace
N1200
Replace
N1210
No
Yes
Go to
SERP Calibration
Go to
SERP Calibration
WCDMA Network Problems TX part
START
NOTE!
Before following this guide the
WCDMA Network Problems
TX part TRS guide must be
finished!
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band : Band I
Fast select channels:
Ch LOW
Modes: Read RSSI
RX On:
Read Measurement
No
Mobile Phone Tester
Instrument Settings:
System Mode:
TX/RX Tester Mode WCDMA
Downlink Channel:
BAND I: 10562
Measurement Mode: Repeat
RF Power ON: -60 dBm
Correction: -1.6 dBm
Is
Phone Reported
Power -60 dBm
(
±5dBm
)
Perform
WCDMA RSSI
Test
Go to
GO-NOGO
Test
Yes
Replace
N1210
WCDMA Network Problems RX part
SEMC Troubleshooting Manual
20
(115)
Summary of Contents for C702
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