Motorola oC81 Series Service Manual page 39

Level 1 and 2 Service Manual
Table 4. Product Family 0C45 Telephone: Level 1 and 2 Troubleshooting Chart (Continued)
SYMPTOM
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.
11. Real Time Clock resetting when
standard battery is removed.
12. No or weak audio when using headset. a) Headset not fully pushed home.
6809462A54
PROBABLE CAUSE
b) Connections between touch screen
display assembly and main board
assembly faulty.
c) Touch screen display assembly
defective.
d) Main board assembly defective.
a) Magnet in flip assembly missing or
defective.
b) Sensor on main board defective.
Vibrator on main board defective.
Faulty charger circuit on main board
assembly.
Lithium Ion RTC battery on the main
board may be depleted.
b) Faulty jack socket on main board
assembly.
March 21, 2003
VERIFICATION AND REMEDY
Refer to remedy 3a and 3b. If fault has not been
cleared, proceed to c.
Replace touch screen display assembly with a
known good one. Temporarily reassemble unit
and verify proper operation. If fault has not been
cleared, replace original touch screen display
assembly and proceed to d.
Replace the main board assembly (refer to 1c).
Verify that the fault has been cleared and
reassemble the unit with the new main board
assembly.
Replace flip assembly with known good one.
Refer to the procedures. Place call to phone and
verify ability to answer by opening flip. If fault is
cleared, rebuild phone with new flip assembly. If
fault is still present, replace original flip
assembly and proceed to b.
Replace the main board assembly (refer to 1c).
Verify that the fault has been cleared and
reassemble the unit with the new main board
assembly.
Replace the main board assembly (refer to 1c).
Verify that the fault has been cleared and
reassemble the unit with the new main board
assembly.
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 main board assembly (refer to 1c).
Verify that the fault has been cleared and
reassemble the unit with the new main board
assembly.
Replace the RTC battery as described in the
procedures. Check RTC time does not reset.
Ensure the headset plug is fully seated in the
jack socket.
Replace the main board assembly (refer to 1c).
Verify that the fault has been cleared and
reassemble the unit with the new main board
assembly.
Troubleshooting
39