C702
1221-7857 rev. 1
TROUBLESHOOTING
Dead Phone Problems
TROU
B
L
E
S
H
O
OTIN
G
START
Step 1:
Try to recover the phone by
using EMMA SW
Press ”C”
Connect USB from PC
Run SEMC BOOT if necessary
Run SUCR SW
If successful claim SW Flash
If not continue with the step 2.
Step 2:
Use TRS Fixture
Connect Only:
VBATT
Is the
current consumption
more than 1mA
Try to trace faulty
component by using
freezing spray
Are any of
N1200 (Thor)
or N1210 (Squid)
getting hot
Replace
N1200 or N1210
Yes
No
Is the
current consumption
still more than
1mA
No
Yes
No
Yes
Connect
DCIO/SEPI
to the Phone
0 Volt DC
between Power
Supply VBATT GND
and Shield Can
Fence
Yes
SL 5 Replace
R2200
SL 4 Escalate
No
SL 5 Remove
N2000
SL 4 Escalate
SL 5 Replace
N2000
SL 4 Escalate
Try to trace faulty
component by using
freezing spray
2.2 Volt DC
at MP 13 (ST2212
VDD_LP)
SL 5 Replace
N2000
SL 4 Escalate
No
32 kHz
at MP 41 (C2103) and
MP 42 (C2106)
Yes
Replace
B2101
No
32 kHz
RTCCLK at
MP 39 (R2122)
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
26 MHz
MCLK at
MP 6 (R2120)
Yes
26 MHz
SYSCLK1 at
MP 97 (SP2102)
Yes
1.8V DC at
MP 20 (ST2207 VDDE18)
and 2.8V DC at
MP 43 (C2230
VccA)
No
No
Replace
N1200
Yes
Check the following voltages:
2.6V MP 24 (ST2205 VAUDIO26)
2.5V MP 19 (ST2206 VANA25)
2.7V MP 25 (T2208 VBT27)
2.7V MP 26 (ST2209 VDIG)
1.2V MP 45 (ST2213 VCORE12)
1.8V MP 7 (ST2214 VCORE18)
All voltages
Ok
Current
Consumption more
than 50mA
Step 1:
Disconnect
VBATT and DCIO/SEPI
Step 2:
Connect: Display and Keypad
to the PBA
Step 3:
Connect Only
: VBATT
Step 4:
Activate EMMA SW
Press the ”C” key and
connect USB Cable from PC
Flash the Phone with ITP SW
Yes
ITP SW Flash
Successful
SL 5 Replace
D2020
SL4 Escalate
Yes
Go to
Flash Problems
No
No
SL 5 Replace
N2000
SL 4 Escalate
No
SL 5 Replace
D2000
SL 4 Escalate
No
Yes
Go to
Dead Phone
Problems part 2
Yes
Dead Phone Problems part 1
No
START
Dead Phone Problems part 2
NOTE !
Before following this guide
the Dead Phone Problems
part 1 must be finished.
VAUDIO26
Voltage
Ok
No
VANA25
Voltage
Ok
Yes
N2202 or D2000
getting hot
No
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
VBT27
Voltage
Ok
Yes
N1400
getting hot
No
N2400 or V2405
getting hot
Is any of
C2209, C2400
C2430, C3135
C3136 or C4213
short circuit
Replace
N2400 or V2405
Yes
No
SL 5 Replace
Faulty Component
SL 4 Escalate
Yes
SL 5 Replace
N2000
SL 4 Escalate
SL 5 Replace
N2202 or D2000
SL 4 Escalate
Is any of
C2216 or
C2326 to C2332
short circuit
No
SL 5 Replace
Faulty Component
SL 4 Escalate
Yes
Is any of
C2205 or C1409
short circuit
Replace
N1400
Yes
No
SL 5 Replace
N2000
SL 4 Escalate
No
SL 5 Replace
Faulty Component
SL 4 Escalate
Yes
VDIG
Voltage
Ok
Is any of
C2215, C8122 or C1407
short circuit
N1400
getting hot
Replace
N1400
Yes
Yes
No
No
SL 5 Replace
N2000
SL 4 Escalate
No
SL 5 Replace
Faulty Component
SL 4 Escalate
Yes
Yes
Go to
Dead Phone
Problems part 3
Dead Phone Problems part 2
SEMC Troubleshooting Manual
9
(115)
Summary of Contents for C702
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