Motorola F3 service manual Level 1 and 2 Troubleshooting Chart

Troubleshooting Chart MOTOFONE F3

Troubleshooting Chart

Table 3. Level 1 and 2 Troubleshooting Chart

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

36 October 27, 2006 6809505A65-A