Acrobat Reader 7.0 (Or Later Version) And Enter The Component Name Or Other Word. Use Zoom To Navigation Keypad Problems; Volume Up And Down Button Problems - Sony Ericsson C903 Troubleshooting Manual

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
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
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
Yes
SL 4 Replace
Is
X4202
No MP 48 (V2476_Pin C2)
SL 5 Replace
Short circuit to
R2489 or N2010
GND
TROUBLESHOOTING Nav igation Keypad Problems - Volume Up and Down Button Problems
Go to
No Numeric Keypad
Problems TRS guide
SL 5 Replace
Yes V2476 or N2010
SL 4 Escalate
Volume + and - 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
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 Volume + and - Buttons
If successful replace SIM Flex Assy
If not then continue with the
Volume + and – Button Problems TRS guide
Are all
Replace
Yes Numeric Keys No
X4300
Ok
SEMC Troubleshooting Manual
C903
Go to
Numeric Keypad
Problems TRS guide
1228-1147 rev. 1 13 (129)