C903
1228-1147 rev. 1
TROUBLESHOOTING
WCDMA Problems
T
R
O
UBL
ESHOOT
ING
Replace
N1210
No
Replace
N1200
Is the
GSM Network
Ok
Go to
GSM Network
Problems TRS guide
No
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast select channels:
Set Low Channel
Ch LOW
Modes: Max Pwr 23dBm
START
NOTE !
This TRS guide can be used
ONLY
for C903 phones with WCDMA BAND I, II or V
Step 1:
Load ETS SW into the Phone
Perform SERP Calibration and retest the Phone
If successful claim SERP Calibration
If not go to step 2.
Step 2:
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
1.8 Volt DC at
MP 111 (R1220
WPA0_EN)
Yes
3V – 3.8V DC at
MP 113 (C1206
VCC_WPA)
No
2.5V – 3V DC at
MP 114 (C1215
WPA_A_EN)
Yes
No
Is the
Problem with
WCDMA TX
Yes
Replace
N1200
No
Yes
Claim Component
N1210
Yes
SL 5 Replace
N2000 or N2010
SL 4 Escalate
No
Disconnect:
VBATT and DCIO/SEPI
Yes
Is L1200
= Max 0.5 Ohm
Replace
N1210
Yes
No
Is the
WCDMA TX
Problem solved
SL 5 Replace
N2010
SL 4 Escalate
Replace
L1200
WCDMA BAND I,II,V Network Problems
Replace
N1210
No
Replace
N1200
Is the
GSM Network
Ok
Go to
GSM Network
Problems TRS guide
No
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band: BAND VIII
Fast select channels:
Set Low Channel:
Ch LOW
Modes: Max Pwr 23dBm
START
NOTE !
This TRS guide can be used
ONLY
for C903 phones with WCDMA BAND VIII support
Step 1:
Load ETS SW into the Phone
Perform SERP Calibration and retest the Phone
If successful claim SERP Calibration
If not go to step 2.
Step 2:
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
1.8 Volt DC at
MP 112 (R1222
WPA2_EN)
Yes
3V – 3.8V DC at
MP 113 (C1206
VCC_WPA)
No
2.5V – 3V DC at
MP 116 (C1214
WPA_C_EN)
Yes
No
Is the
Problem with
WCDMA TX
Yes
Replace
N1200
No
Yes
Claim Component
N1210
Yes
SL 5 Replace
N2000 or N2010
SL 4 Escalate
No
Disconnect:
VBATT and DCIO/SEPI
Yes
Is L1200
= Max 0.5 Ohm
Replace
N1210
Yes
No
Is the
WCDMA TX
Problem solved
SL 5 Replace
N2010
SL 4 Escalate
Go to
SERP Calibration
Replace
L1200
WCDMA BAND VIII Network Problems
SEMC Troubleshooting Manual
29
(129)