K850
1203-2528 rev. 1
TROUBLESHOOTING
Camera Door Problems
TROU
B
L
E
S
H
O
OTIN
G
START
Load ITP SW
into the phone.
Insert the
Dummy Battery
Connect: VBATT and
DCIO/SEPI
Use Fault Trace SW
Fault trace SW
MMI
Misc
Activate:
Camera Door Test
Camera Door Test
Open/Close
Ok
Flash the Phone with
EMMA
SUCR SW
Yes
Camera Door
Open position
Ok
No
Disassemble the
phone
Use TRS Fixture
No
Fault trace SW
MMI
Misc
Activate:
Camera Door Test
3V, 225ms
Pulses shortly
after camera door test
activation at
MP 59 (TP2500)
1.8V,
225ms Pulses
shortly after camera door
test activation at
MP 91 (R2500)
No
Replace
D2420
No
Replace
N2500
Yes
3V, 225ms
Pulses shortly
after camera door test
activation at MP 55
(TP2502)
Yes
Replace
V2500
Replace
D2420
3V,
225ms
Pulses shortly
after camera door test
activation at MP 93
(V2505 Pin 4)
No
Yes
No
Replace
X2511
Yes
Yes
Disassemble the
phone
Use TRS Fixture
Fault trace SW
MMI
Misc
Activate:
Camera Door Test
3V, 250ms
Pulses shortly
after camera door test
activation at MP 58
(TP2501)
No
Yes
Camera Door problems
SL 5 Replace
N2000
SL 4 Scrap
Yes
Clean Pad X2506
Clean Pad X2507
Yes
2.8 Volt Pk-Pk
Pulses at
MP 141 (C4206
VIBR_OUT)
No
Yes
No
SL 5 Replace
L4202
SL 4 Scrap
Connection
between
MP PBA GND and
MP 137 (X2507)
Ok
No
SL 5 Replace
L4203
SL 4 Scrap
Is any of
C4206 or C4207
Short circuit
2.8 Volt Pk-Pk
Pulses at
MP 136 (X2506)
No
SL 5 Replace
C4206 or C4207
SL 4 Scrap
Yes
START
Load ITP SW into the phone
Use TRS Fixture.
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI-Misc
Activate:
Vibrator Test
If Vibrator is working properly at the
TRS Fixture then replace Vibrator if not
Continue with the Vibrator problems TRS guide
Vibrator problems
/ Vibrator Problems
SEMC Troubleshooting Manual
13
(101)