C903
1228-1147 rev. 1
TROUBLESHOOTING
T
R
O
UBL
ESHOOT
ING
Nav igation Keypad Problems - Volume Up and Down Button Problems
START
Step 1:
Go to Service Tests Menu and perform Keyboard Test
If successful flash the Phone with EMMA SUCR SW
if not go to step 2.
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Use TRS Fixture Display Holder and Connect:
Main Flex Assy and Navigation PBA 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 Navigation Keypads
If successful Replace Navigation PBA Assy or Main Flex Assy
If not then continue with the
Navigation Keypad Problems TRS guide
No
1:
Disconnect the VBATT and DCIO/SEPI
2:
Disconnect and Remove the
Main Flex Assy and Navigation PBA Assy
from the TRS Fixture
Are all
Numeric Keys
Ok
Go to
Numeric Keypad
Problems TRS guide
Is
MP 48 (V2476_Pin C2)
Short circuit to
GND
Yes
SL 5 Replace
V2476 or N2010
SL 4 Escalate
Yes
SL 4 Replace
X4202
SL 5 Replace
R2489 or N2010
No
Navigation Keypad Problems
START
Step 1:
Go to Service Tests Menu and perform Keyboard Test
If successful flash the Phone with EMMA SUCR SW
if not go to step 2.
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Connect: SIM Flex 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 and - Buttons
If successful replace SIM Flex Assy
If not then continue with the
and – Button Problems TRS guide
No
Are all
Numeric Keys
Ok
Go to
Numeric Keypad
Problems TRS guide
Yes
Replace
X4300
and - Button Problems
SEMC Troubleshooting Manual
13
(129)
