C903
1228-1147 rev. 1
TROUBLESHOOTING
Bluetooth Problems
T
R
O
UBL
ESHOOT
ING
- GSM Network Problems
START
Step 1:
Flash the Phone with EMMA SUCR SW and retest the Phone
If successful claim SW Flash
If not go to step 2.
Step 2:
Continue with the
Bluetooth Problems TRS guide
1:
Load ETS SW into the Phone
2:
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
3:
Use Fault Trace SW
4:
Use RF Probe connected to
the Spectrum Analyzer
Instrument
NOTE! Do not use 10:1 Divider
Spectrum Analyzer
Instrument Settings:
Frequency: 2402 MHz
Span: 10 MHz
Amplitude: 10 dBm
Use Peak Search (MKR)
Fault trace SW Settings:
TX and RX
Bluetooth
Channel 0
Set MaxPwr MOD 0
NOTE!
MODE 0 Frequency should be
2401.84 MHz
(
±0.05 MHz)
3 dBm at
MP 4 (X1300_Pin 1)
Blt MaxPwr MOD 0
(
±3 dBm)
Fault trace SW Settings:
TX and RX
Bluetooth
Channel 0
Turn Off
(This must be done before
the next step)
Set MaxPwr MOD 1
NOTE!
MODE 1 Frequency is
2402.16 MHZ
(
±0.05 MHz)
Yes
3 dBm at
MP 4 (X1300_Pin 1)
Blt MaxPwr MOD 1
(
±3 dBm)
Replace
N1300
No
Is
MOD 1 Freq.
at least 230 KHz
higher than
MOD 0 Freq.
Yes
No
Replace
BT_Antenna
or N1300
Yes
-1 dBm
at MP 3
(W1300_Pin 5) and
MP 5 (W1300_Pin 7)
(
±5 dBm)
No
Replace
W1300 or X1300
Yes
2.7 Volt DC at
MP 120 (C2210
VBT27)
No
SL 5 Replace
N2000
SL 4 Escalate
No
Yes
SL 4 Replace
N1300 or N2410
SL 5 Replace
N2010
Bluetooth Problems
Max 0.5
Ohm between
MP 40 (X1200_Pin 1) and
MP 41
(X1200_Pin 2)
Replace
X1200
No
Are
X1000, X1002
X1003,X1010,X1011,
X1030 and X1210
connected to
GND
Yes
Replace
Faulty Component
No
Yes
START
Step 1:
Replace Rear Cover Assy and retest the Phone
If successful claim Rear Cover Assy
If not go to step 2.
Step 2:
Load ITP SW into the Phone
Perform SERP Calibration and retest the Phone
If successful claim SERP Calibration
If not go to step 3.
Step 3:
Disassembly the Phone and continue with the
GSM Network Problems TRS guide
Max 1 Ohm
between MP 42
(ST1200) and MP 41
(X1200_Pin 2)
SL 5 Replace
R1204, R1206 or
C1209
SL 4 Escalate
No
Replace
N1200
Yes
Is the
GSM Network
Problem
solved
Claim Component
N1200
Yes
SL 5 Replace
N2010 or N2000
SL 4 Escalate
No
GSM Network Problems
SEMC Troubleshooting Manual
28
(129)