
C903
1228-1147 rev. 1
TROUBLESHOOTING
Charging Problems
T
R
O
UBL
ESHOOT
ING
- USB/VBUS Charging Problems
START
Step 1:
Perform Charging Test
If
NOT
successful go to step 2.
Step 2:
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
Is X2201
damaged
SL5 Replace
X2201
SL4 Escalate
No
Yes
Is MP 36 (TP2202)
Short circuit to GND
SL 5 Replace
N2000
SL 4 Escalate
Yes
5 Volt DC at
MP 18 (C2440)
SL 4 Replace
V2202
SL 5 Replace
N2000
Yes
No
No
Is MP 18 (C2440)
Short circuit to GND
SL 4 Replace
C2440, V2412 or
V2202
SL 5 Replace
C2441 or N2000
Yes
No
Disconnect:
VBATT and DCIO/SEPI
Is the
R2490 and R2449
=Max 1 Ohm
SL 4
Escalate
SL 5
Replace X2405
Yes
Replace
R2490 or R2449
No
Charging Problems
START
Step 1:
Perform the System Connector Protection Test
If successful go to step 2.
Step 2:
Use Phone with the Signalling SW (SSW)
Use TRS Fixture and connect: VBATT
Connect: USB Cable from the PC to the Phone
5V – 5.2V DC at
MP 70 (N2421_Pin 4)
SL 5 Replace
N2000
SL 4 Escalate
Yes
5V – 5.2V DC at
MP 8 (X2405_Pin 1)
No
SL5 Replace
X2405
SL4 Escalate
No
Disconnect:
VBATT and USB Cable
Yes
Is L2468 = Max 1 Ohm
Replace
L2468
No
Replace
N2421
Yes
USB/VBUS Charging Problems
SEMC Troubleshooting Manual
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