C905
1222-9526 rev. 1
TROUBLESHOOTING
TROU
B
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E
S
H
O
OTIN
G
N avigation Keypad & Game Button - Volume Button Problems
START
Step 1:
Use TRS Fixture
Connect:
PBA Key Flex Flip and Slider FPC Assy 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
Game A and B Buttons on Key Flex Flip Assy
If successful then
Replace
PBA Key Flex Flip or Slider FPC Assy
If not go to step 2.
Step 2:
Continue with the
Navigation Keypad and Game A and B Button Problems
TRS guide
No
Yes
Is the
Numeric Keypad
and Camera Snap
Button
Ok
Go to
Numeric Keypad and
Camera Snap Button
Problems TRS guide
Replace
X4200
Navigation Keypad and Game A and B Button Problems
START
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Is
the problem with
S2453 Volume Up
Button
Yes
1.8 Volt DC at
MP 96 (S2453_Pin A) and
MP 97 (S2453_Pin B)
Press the
S2453 Volume Up
Button
Yes
0 Volt DC at
MP S2453_Pin A and
MP S2453_Pin B
No
Yes
Replace
S2453
No
No
No
SL 5 Replace
N2010
SL 4 Escalate
Are
MP 96 (S2453_Pin A)
and MP 97 (S2453_Pin B)
short circuit to the PBA GND
(Shield Can
Fence)
SL 5 Replace
R2473 or N2010
SL 4 Escalate
Yes
Are
MP 96 (S2453_Pin A)
and MP 97 (S2453_Pin B) still
short circuit to the PBA GND
(Shield Can
Fence)
Remove the
S2453 Volume Up
Button
SL 5 Replace
V2474 or V2478
SL 4 Escalate
Yes
Replace
S2453
No
1.8 Volt DC at
MP 94 (S2454_Pin A) and
MP 95 (S2454_Pin B)
Press the
S2454 Volume Down
Button
Yes
0 Volt DC at
MP 94 (S2454_Pin A) and
MP 95 (S2454_Pin B)
Replace
S2454
No
SL 5 Replace
N2010
SL 4 Escalate
Yes
Are
MP 94 (S2454_Pin A)
and MP 95 (S2454_Pin B)
short circuit to the PBA GND
(Shield Can
Fence)
No
SL 5 Replace
R2474 or N2010
SL 4 Escalate
No
Remove the
S2454 Volume Down and
S2424 Camera Play
Buttons
Yes
Are
MP 94 (S2454_Pin A)
and MP 95 (S2454_Pin B) still
short circuit to the PBA GND
(Shield Can
Fence)
Replace
S2454 and S2424
No
SL 5 Replace
V2477,V2476
or V2472
SL 4 Escalate
Yes
Volume Up and Down Button Problems
SEMC Troubleshooting Manual
13
(124)