C903
1228-1147 rev. 1
TROUBLESHOOTING
A-GPS Problems
T
R
O
UBL
ESHOOT
ING
- Accelerometer Problems
START
Step 1:
Go to Service Tests Menu and perform the GPS System Test
If successful Flash the Phone with EMMA SUCR SW
if not go to step 2.
Step 2:
Replace A-GPS Antenna and retest the Phone
If successful claim A-GPS Antenna
if not go to step 3.
Step 3:
Replace A-GPS PBA and retest the Phone
If successful claim A-GPS PBA
if not go to step 4.
Step 4:
Replace Main Flex Assy and retest the Phone
If successful claim Main Flex Assy
if not go to step 5.
Step 5:
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
1.8 Volt DC
At MP 102 (R1402
AGPS_LDO_EN)
1.8 Volt DC
At MP 105 (R1401
AGPS_PWRON)
Yes
No
Yes
26 MHz at
MP 103 (R2117
AGPS_CLK)
No
SL 4 Replace
N2410
SL 5 Replace
N2102
1:
Disconnect:
VBATT and DCIO/SEPI
2:
Connect:
VBATT and DCIO/SEPI
Yes
Replace
N2410
No
More than
1.8V Pk-Pk Pulses
at MP 104 (C1407)
Shortly after phone
Power On
SL 5 Replace
N2010
SL 4 Escalate
No
1:
Disconnect:
VBATT and DCIO/SEPI
2:
Connect:
VBATT and DCIO/SEPI
Yes
More than
1.8V Pk-Pk Pulses
at MP 101 (C1406)
Shortly after phone
Power On
SL 5 Replace
N2010
SL 4 Escalate
No
Replace
X4202
Yes
A-GPS Problems
START
Step 1:
Go to Service Tests Menu and perform the Accelerometer 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 Dummy Battery connected to Power Supply Channel 1 (VBATT)
Connect: DCIO/SEPI
Use Fault Trace SW
Fault Trace SW
MMI
Misc
Init Screen Testing
Activate:
Accelerometer Test
NOTE!
Read X, Y, Z information in
the Info Box.
Move the Phone and
Activate
Accelerometer Test again
NOTE!
Read X, Y and Z information
in the Info Box.
NOTE!
Repeat this Test Sequence
10 Times
Fault Trace SW
General
Asic Revisions
Read All
Is
Accelerometer
(N2411)
Asic Revision
0x3b
Replace
N2411
No
Yes
Can
you see
that X, Y and Z
information are
changing in the
info box
Flash the Phone with
EMMA SUCR SW
Replace
N2411
No
Is the
Accelerometer
Problem solved
Claim Component
N2411
Yes
SL 5 Replace
N2010
SL 4 Escalate
No
Yes
Accelerometer Problems
SEMC Troubleshooting Manual
30
(129)
