C702
1221-7857 rev. 1
TROUBLESHOOTING
Charging Problems
TROU
B
L
E
S
H
O
OTIN
G
- USB/VBUS Charging Problems
5 Volt DC at
MP 101 (R2287)
No
Replace
N2402
SL 5 Replace
N2000
SL 4 Escalate
Yes
Connect
DSU-60/ USB cable
from PC to the phone
No
5 Volt DC at
MP 102 (C2422)
Yes
SL 5 Replace
C2421 or C2422
SL 4 Escalate
START
Step 1:
Perform System Connector Protection Test
If the test is pass go to step 2
Step 2:
Use Phone with Normal SW
Use TRS Fixture
Connect: VBATT
Yes
Is any of
C2421 or C2422
short circuit
No
SL 5 Replace
L2407
SL 4 Escalate
Is
L2407
Max 0.5 Ohm
No
Replace
System Connector
X2300
Yes
Disconnect
VBATT and USB Cable
From the phone
USB/VBUS Charging Problems
Yes
No
Use TRS Fixture
Connect: VBATT
and DCIO/SEPI
Use Fault Trace SW
Perform
Battery Calibration
No
Battery Calibration.
Passed
Current Calibration
Passed
No
No
Flash the phone with
EMMA SUCR SW
and go to
Charging Test
No
3.2V and 4.1V DC
at MP 80 (TP2200) during
Battery Calibration
SL 5 Replace
R2200
SL 4 Escalate
5 Volt DC at
MP 117 (C2201
DCIO)
Replace
System Connector
X2300
Phone
consuming more
than 10mA Charger
Current
(DCIO/SEPI)
Yes
Start
Current Calibration
(C.C.)
SL 5 Replace
R2201
SL 4 Escalate
Replace
V2202
R2201
0.3 Ohm
No
MP 46 (C2241
DCIO_INT)
Higher than
3,8 Volt DC
MP 121 (R2201
CHSENSEP) Higher
than 3,8 Volt DC
(During C.C.)
MP 119
(V2202_Pin 2
CHREG) Lower than
MP 46 (C2241)
(During C.C.)
Yes
No
Yes
No
Phone
Consuming
DCIO/SEPI Current
(During Current
Calibration)
Yes
Replace
X2200
Yes
Is
MP 81 (TP2202)
Short circuit to
Shield Can
Fence
Yes
Yes
SL 4 Replace
V2421
SL 5 Replace
C2423 and C2424
Is
Connection
between
Shield Can Fence and
Power Supply GND
Ok
Yes
No
SL 5 Replace
N2000
SL 4 Escalate
SL 5 Replace
N2000
SL 4 Escalate
Yes
Yes
No
No
No
Yes
Use TRS Fixture
Connect: VBATT
and DCIO/SEPI
Use Fault Trace SW
SL 5 Replace
N2000
SL 4 Escalate
START
Step 1:
Perform System Connector Protection Test
If the test is pass go to step 2
Step 2:
Load ITP SW into the phone
Connect: Dummy Battery
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW:
Logic, Phone Power and perform
Battery and Current Calibration
NOTE !
It is very important to follow
instrument setting instructions during
Battery and Current Calibration.
Charging problems
SEMC Troubleshooting Manual
15
(115)
Summary of Contents for C702
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