K850
1203-2528 rev. 1
TROUBLESHOOTING
Charging Problems
TROU
B
L
E
S
H
O
OTIN
G
Yes
No
No
Battery Calibration.
Passed
Current Calibration
Passed
No
No
Flash with EMMA
SUCR SW
Go to
Charging Test
No
3.2V
and 4.1V DC
at MP 31 (TP2200)
during Battery
Calibration
SL 5 Replace
R2200
SL 4 Scrap
5 Volt DC at
MP 40 (C2201
DCIO)
Replace
System Connector
X2400
Phone
consuming more
than 10mA
Charger (DCIO)
Current
Yes
Start
Current Calibration
(C.C.)
SL 5 Replace
N2000
SL 4 Scrap
No
Replace
X2200
SL 5 Replace
N2000
SL 4 Scrap
Yes
Is
MP 29 (TP2202)
Short circuit
To GND
Yes
SL 5 Replace
C2423 and C2424
SL 4 Replace
V2421
Connection
between
PBA GND to Power
supply GND
Ok
Yes
No
Yes
Phone
Consuming
more than 10mA
DCIO Current
(During C.C.)
Yes
MP 47
(C2241 DCIO_INT)
Higher than
3,8 Volt DC
No
SL 5 Replace
N2000
SL 4 Scrap
No
MP 41 (R2201)
CHSENSEP Higher
than 3,8 Volt DC
(During C.C.)
Yes
R2201
0.1 Ohm
Yes
Yes
SL 5 Replace
R2201
SL 4 Scrap
No
MP 39
(V2202 Pin2)
CHREG Lower than
MP 47 (C2241)
(During C.C.)
No
Replace
V2202
Yes
SL 5 Replace
N2000
SL 4 Scrap
No
Yes
START
Perform System Connector Protection Test
Load ITP SW into the phone
Connect: Dummy Battery
Connect:VBATT and DCIO/SEPI
Use Fault Trace SW:
Logic, Phone Power
Perform
Battery and Current Calibration
It is very important to follow
instrument settings instructions
when performing the Battery and Current
Calibration Test.
Use TRS Fixture and
Fault Trace SW
Connect:
VBATT and
DCIO/SEPI
Start Battery
Calibration Test
Use TRS Fixture and
Fault Trace SW
Connect:
VBATT and
DCIO/SEPI
Charging problems
5 Volt DC at
MP 44 (ST2201)
No
Replace
System Connector
X2400
Yes
Replace
N2402
SL 5 Replace
N2000
SL 4 Scrap
Yes
5 Volt DC at
MP 108 (R2470/1)
Connect
DSU-60/ USB cable
from PC to
the phone
No
5 Volt DC at
MP 107 (R2470/2)
Yes
SL 5 Replace
R2470
SL 4 Scrap
No
START
Step 1:
Perform System Connector Protection Test
If step 1 is Ok then continue with step 2.
Step 2:
Use Phone with Normal SW
Use TRS Fixture
Connect: VBATT
USB/VBUS Charging problems
/ USB/VBUS Charging Problems
SEMC Troubleshooting Manual
14
(101)