Troubleshooting Chart - Motorola MOTOFONE F3 Service Manual

Troubleshooting Chart

Troubleshooting Chart
Table 3. Level 1 and 2 Troubleshooting Chart
Symptom
1. Telephone will not turn on or stay on.
2. Telephone exhibits poor reception or
erratic operation such as calls frequently
dropping or weak or distorted audio.
3. No display.
4. Incoming call alert transducer audio
distorted or volume is too low.
5. Telephone transmit audio is weak.
(usually indicated by called parties
complaining of difficulty in hearing voice).
6. Receive audio from earpiece speaker is
weak or distorted.
7. Telephone will not recognize or accept
SIM card.
8. No or weak audio when using headset. a) Headset plug not pushed in fully.
36
Probable Cause
a) Battery either discharged or
defective.
b) Transceiver board defective.
a) Speaker/antenna assembly
defective
b) Transceiver board defective.
a) Connections between transceiver
and display faulty.
b) Display module defective.
a) Faulty antenna/speaker assembly.
b) Transceiver board defective
a) Microphone defective.
b) Transceiver board defective
a) Contacts between earpiece
speaker and transceiver board faulty.
b) Transceiver board defective.
a) SIM card defective.
b) Transceiver board defective
October 27, 2006
Verification And Remedy
Measure the voltage at TP_BATT+ with battery
attached. If voltage is below 3.0V, attach a
charger to the phone and ensure that the phone
is charging. If the phone does not charge,
change the battery and repeat the measurement
charging procedure. If the phone still does not
turn on, proceed to b).
Forward unit to a level 3 service center for
replacement.
Check connection between the speaker/antenna
assembly and the transceiver board. If the
contact is intermittent visually, replace with a
known good speaker/antenna assembly. If the
fault is still present, proceed to b.
Forward unit to a level 3 service center for
replacement.
Check connections between transceiver board
and display. If display still does not come up,
proceed to b.
Replace with a known good display module.
Verify that the fault has been cleared with the
new display module and reassemble the unit.
Replace the antenna/speaker assembly with a
known good antenna/speaker assembly. If the
problem goes away, replace with a new antenna/
speaker assembly. Else proceed to b.
Forward unit to a level 3 service center for
replacement.
Replace the microphone as described in the
procedures. If fault is not cleared, proceed to b.
Forward unit to a level 3 service center for
replacement.
Replace the earpiece speaker with a known
good one. Reassemble with a new front housing
if the fault goes away. If the fault is still present,
proceed to b.
Forward unit to a level 3 service center for
replacement.
Check the SIM card contacts for dirt. Clean if
necessary, and check if fault has been cleared.
If the contacts are clean, insert a known good
SIM card into the telephone. Power up the unit
and confirm that the card has been accepted. If
the fault goes away, replace the defective SIM
card. If the SIM card is not at fault, proceed to b.
Forward unit to a level 3 service center for
replacement.
Ensure the headset plug is fully seated in the
jack.
MOTOFONE F3
6809505A65-A