
C903
1228-1147 rev. 1
TROUBLESHOOTING
Dead Phone Problems
T
R
O
UBL
ESHOOT
ING
START
Step 1:
Try to recover the Phone by using
EMMA SW
Press key 2 and 5
Connect USB Cable to the Phone
and update SEMCBOOT after this
Run EMMA SUCR SW
and retest the Phone
If successful claim SW Flash
If not continue with Step 2.
Step 2:
Use TRS Fixture
Connect: VBATT
Only
Is the
current consumption
more than 1mA
Try to trace
Faulty Component
by using Freezing Spray
Is
N2420 or N1200
getting hot
Replace
N2420 or N1200
Yes
No
No
Yes
Connect:
DCIO/SEPI to the Phone
Is the
connection between
MP 35 (X2201_Pin 4) and
MP 27 (X1040 / PBA
GND) Ok
Yes
SL 4 Escalate
SL 5 Replace
X2201 or R2200
No
SL 5 Remove
N2000
SL 4 Escalate
32 kHz
at MP 79 (C2100)
SL 4 Escalate
SL 5 Replace
B2100 or N2000
No
32 kHz RTCCLK at
MP 106 (R1404)
Yes
No
26 MHz
SYSCLK1 at
MP 89 (SP2108)
Yes
Yes
1.8V DC
At MP 86 (C2209
VDDE18) and 2.8V DC at
MP 119 (C1251
LDOA_OUT)
No
No
Yes
Check the following
Voltages:
2.6V MP 84 (C2402 VAUDIO26)
2.5V MP 90 (C2208 VANA25)
2.7V MP 120 (C2210 VBT27)
2.7V MP 117 (C2211 VDIG)
2.6V MP 109 (C2212 VBEAR26)
1.2V MP 61 (C2220 VCORE12)
1.8V MP 56 (L2202 VCORE18)
2.8V DC
at MP 110 (C1253)
Replace
N1200 or N1300
Yes
Replace
N1211
No
Are
all Voltages
Ok
Step 1:
Disconnect:
VBATT and DCIO/SEPI
Step 2:
Connect:
Main Flex Assy and Navigation PBA
Assy to the PBA
Connect: VBATT
Only
Step 3:
Use EMMA SW
Press the ”C” key and Connect
USB Cable from the PC to the PBA
Flash the Phone with the ETS SW
Yes
Is the
ITP SW Flash
Successful
SL 5 Replace
N2020
SL 4 Escalate
Yes
Go to Data
Communication
Problems TRS guide
No
No
Go to
Dead Phone
Problems part 2
SL 5 Replace
N2000
SL 4 Escalate
SL 4 Replace
N2420
SL 5 Replace
N2000
Is the
current consumption
still more than
1mA
Try to trace Faulty
Component by using
Freezing Spray
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
1.8V DC
at MP 108 (R2115)
No
SL 5 Replace
N2010
SL 4 Escalate
Yes
Dead Phone Problems part 1
START
NOTE !
Before following this guide the
Dead Phone Problems part 1 TRS guide
must be finished.
Is the
VAUDIO26
Voltage
Ok
No
Is the
VANA25
Voltage
Ok
Yes
Is any of
N2200 or N2010
getting hot
No
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
Is the
VBT27
Voltage
Ok
Yes
Is N1300
getting hot
No
Is N2422
getting hot
Replace
N2422
Yes
No
SL 5 Replace
N2000
SL 4 Escalate
SL 4 Replace
N2200
SL 5 Replace
N2010
Replace
N1300
Yes
No
SL 5 Replace
N2000
SL 4 Escalate
Is the
VDIG
Voltage
Ok
Is any of
N2411 or N1300
getting hot
Yes
Yes
No
No
Yes
Go to
Dead Phone
Problems part 3
Is the
VBEAR26
Voltage
Ok
No
SL 5 Replace
N2000
SL 4 Escalate
Yes
Is X4202
damaged
No
Replace
X4202
Yes
Replace
N2411 or N1300
Dead Phone Problems part 2
SEMC Troubleshooting Manual
9
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