W995
1230-1858 rev. 1
TROUBLESHOOTING
Charging Problems
T
R
O
UBL
ESHOOT
ING
START
Step 1:
Perform Charging Test
If
NOT
successful go to Step 2.
Step 2:
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
Is MP 103
(X2201_Pin 2)
connected to
MP 104 (TP2202)
Replace
X2201
No
Yes
Is MP 104 (TP2202)
Short circuit to GND
SL 4 Replace
V2200
SL 5 Replace
N2000
Yes
5 Volt DC at
MP 102 (C2440)
SL 4 Replace
V2202
SL 5 Replace
N2000
Yes
No
No
Is MP 102 (C2440)
Short circuit to
GND
SL 4 Replace
C2440 or V2202
SL 5 Replace
C2441 or N2000
Yes
No
Disconnect:
VBATT and DCIO/SEPI
Are
R2490 and R2449
= Max 1 Ohm
Replace
X2405
Yes
No
Replace
R2490 or R2449
Charging Problems
- USB/VBUS Charging Problems
START
Use Phone with the Signalling SW (SSW)
Use the TRS Fixture and connect: VBATT
Connect: USB Cable from the PC to the Phone
5V – 5.2V DC at
MP 32 (R2444)
SL 5 Replace
N2000
SL 4 Escalate
Yes
Is
MP 92 (X2405_Pin 1)
Short Circuit to GND
No
Replace
C2439 or N2421
No
Disconnect:
VBATT and USB Cable
Yes
Is R2451
= Max 1 Ohm
Replace
R2451
No
Replace
N2421
Yes
5V – 5.2V DC at
MP 92 (X2405_Pin 1)
Replace
X2405
No
Yes
USB/VBUS Charging Problems
SEMC Troubleshooting Manual
20
(125)