C905
1222-9526 rev. 1
TROUBLESHOOTING
On-Off Key -
TROU
B
L
E
S
H
O
OTIN
G
Numeric Keypad & Camera Snap Button Problems
START
Step 1:
Replace PBA Key Flex Flip and retest the Phone
If successful claim PBA Key Flex Flip
if not go to step 2.
Step 2:
Replace Slider FPC Assy and retest the Phone
If successful claim Slider FPC Assy
if not go to step 3.
Step 3:
Use TRS Fixture
Connect:
PBA Key Flex Flip and Slider FPC Assy to the PBA
Connect: VBATT and DCIO/SEPI
Is the
Problem with
Power Off
No
3.7 Volt DC at
MP 60 (C2472)
Yes
Press the
On/Off Key
Yes
0 Volt DC at
MP 60 (C2472)
Replace
X4200
No
SL 5 Replace
N2000
SL 4 Escalate
Yes
Disconnect:
Slider FPC Assy
from the PBA
No
SL 4 Replace
V2470
SL 5 Replace
N2000
1.8 Volt DC at
MP 5 (R2470)
SL 5 Replace
R2470 or N2010
SL 4 Escalate
No
3.7 Volt DC at
MP 60 (C2472)
Yes
Replace
X4200
Yes
No
1.8 Volt DC at
MP 5 (R2470)
Replace
V2470
Yes
SL 5 Replace
R2470, V2480 or
N2010
SL 4 Escalate
No
On-Off Key Problems
START
Step 1:
If Problem with both Numeric and Navigation Keypads
go to step 3, if not go to step 2.
Step 2:
Use TRS Fixture
Connect:
Numeric Key Foil to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Activate
Keypad Scan Test
Perform Keypad Scan Test by pressing all
Keypads and Camera Snap Button on Numeric Key Foil
If successful then
Replace
Numeric Key Foil
If not go to step 3.
Step 3:
Use TRS Fixture
Connect:
Numeric Key Foil to the PBA
Connect: VBATT and DCIO/SEPI
and continue with the
Numeric Keypad and Camera Snap Button Problems
TRS guide
Is the
Problem with
both Numeric and
Navigation
Keypads
Replace
X2410 or X2411
No
Yes
1.8 Volt DC at
MP 96 (S2453_Pin A) and
MP 94 (S2454_Pin A)
Go to Volume
Up and Down Button
Problems TRS guide
No
Yes
Go to Camera
Play and Mode (REC)
Button Problems
TRS guide
No
Is the
problem with
Numeric Keypad and
Camera Snap
Button
No
Yes
Go to
Navigation Keypad
and Game A and B
Button Problems
TRS guide
1.8 Volt DC at
MP 82 (S2415_Pin A) and
MP 88 (S2424_Pin A)
Yes
1.8 Volt DC at
MP 76
(V2481_Cathode)
SL 5 Replace
V2481
SL 4 Escalate
No
Yes
1.8 Volt DC at
MP 5 (R2470), MP 4
(R2471) and MP 39
(R2472)
0 Volt DC
when pressing
Key ”3" at MP 5 (R2470)
Key ”6" at MP 4 (R2471)
and Key ”1" at
MP 39 (R2472)
Yes
Flash the Phone with
EMMA SUCR SW
Yes
1:
Disconnect:
VBATT and DCIO/SEPI
2:
Disconnect:
Numeric Key Foil
from the PBA
No
Is
MP 157 (C2461),
MP 158 (C2462), MP 159
(C2464) Short Circuit to GND
(Shield Can
Fence)
SL 5 Replace
V2486,
V2487 or V2484
SL 4 Escalate
Yes
SL 5 Replace
N2010
SL 4 Escalate
No
Is
MP 5 (R2470)
MP 4 (R2471), MP 39 (R2472)
Short Circuit to GND
(Shield Can
Fence)
No
No
SL 5 Replace
V2480,
V2473 or V2479
SL 4 Escalate
Yes
SL 5 Replace
R2470, R2471 or
R2472
SL 4 Escalate
Numeric Keypad and Camera Snap Button Problems
SEMC Troubleshooting Manual
12
(124)