Motorola U9 Service Manual page 39

Level Service Manual
Table 3. : Level 1 and 2 Troubleshooting Chart (Continued)
SYMPTOM
6. Receive audio from earpiece speaker is
weak or distorted.
7. Telephone will not recognize or accept
SIM.
8. Phone does not sense when flip is
opened or closed (usually indicated by
inability to answer incoming calls by
opening the flip, or inability to make
outgoing calls).
9. Vibrator feature not functioning.
10. Internal Charger not working.
6809513A81-A
PROBABLE CAUSE
d) Transceiver board defective.
a) Connections to or from transceiver
board assembly defective.
b) Flip assembly defective.
c) Antenna assembly defective.
d) Transceiver board assembly
defective.
a) SIM defective.
b) Flip assembly defective.
c) Transceiver board assembly
defective.
a) Flip assembly defective.
b) Transceiver board assembly
defective.
a) Flip assembly defective.
b) Transceiver board assembly
defective.
Faulty charger circuit on transceiver
board assembly.
April 01, 2008
VERIFICATION AND REMEDY
Forward to an authorized level 3 service center.
Gain access to the transceiver board assembly
as described in the procedures. Check flex and
the flex connector from the flip assembly to the
transceiver board assembly. If flex is at fault,
replace flip assembly. If flex connector is at fault,
proceed to d. If connection is not at fault,
proceed to b.
Temporarily replace the flip assembly with a
known good assembly. If fault has been cleared,
reassemble with the new flip assembly. If fault
not cleared, proceed to c.
Check to make sure the antenna is installed
correctly. If the antenna is installed correctly,
substitute a known good antenna assembly. If
this does not clear the fault, reinstall the original
antenna assembly and proceed to d.
Forward to an authorized level 3 service center.
Check the SIM contacts for dirt. Clean if
necessary and check if fault has been cleared. If
the contacts are clean, insert a known good SIM
into the telephone. Power up the unit and
confirm that the SIM has been accepted. If the
fault no longer exists, replace the defective SIM.
If the SIM is not at fault, proceed to b.
Temporarily replace the flip assembly with a
known good assembly. If fault has been cleared,
reassemble with the new flip assembly. If fault
not cleared, proceed to c.
Forward to an authorized level 3 service center.
Temporarily replace the flip assembly with a
known good assembly. If fault has been cleared,
reassemble with the new flip assembly. If fault
not cleared, proceed to b.
Forward to an authorized level 3 service center.
Temporarily replace the flip assembly with a
known good assembly. If fault has been cleared,
reassemble with the new flip assembly. If fault
not cleared, proceed to b.
Forward to an authorized level 3 service center.
Test a selection of batteries in the rear pocket of
the desktop charger. Check LED display for the
charging indications. If these are charging
properly, then the internal charger is at fault.
Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble the unit with the new transceiver
board assembly.
Troubleshooting
39