Motorola W388, W216, W231 service manual Level 1 and 2 Troubleshooting Chart

Level 1-2 Service Manual

Troubleshooting Chart

Table 4: Level 1 and 2 Troubleshooting Chart

Symptom	Probable Cause	Verification and Remedy
1. Telephone will not turn on or stay on.	a) Battery either discharged or	Measure battery voltage across a 50 ohm (>1
	defective.	Watt) load. If the battery voltage is <3.25 Vdc,
		recharge the battery using the appropriate
		battery charger. If the battery will not
		recharge, replace the battery. If battery is not
		at fault, proceed to b.
	b) Battery terminals open or mis-	Visually inspect the battery terminals on both
	aligned.	the battery and the telephone. Realign and, if
		necessary, either replace the battery or refer
		to a Level 3 Service Center for the battery
		connector replacement. If battery terminals
		are not at fault, proceed to c.
	c) keypad defective.	Replace the keypad. Temporarily connect a
		+3.6 Vdc supply to the battery terminals.
		Press and hold the PWR button. If unit turns
		on and stays on, disconnect the dc power
		source and reassemble with the new keypad.
2. Telephone exhibits poor reception or	Connections to or from lower PCB	Check connection between the antenna and
erratic operation such as calls frequently	defective.	the lower PCB.
dropping or weak or distorted audio.
3. Display is erratic, or provides partial	LCM defective.	Replace the LCM. Verify that the fault has
or no display.		been cleared and reassemble the unit with
		the new LCM.
4. Incoming call alert transducer audio	Speaker defective.	Replace the speaker as described in the pro-
distorted or volume is too low.		cedures. Verify that the fault has been
		cleared and reassemble the unit with the new
		speaker.
5. Telephone transmit audio is weak.	Microphone defective.	Replace the microphone as described in the
(usually indicated by called parties com-		procedures. Verify that the fault has been
plaining of difficulty in hearing voice).		cleared and reassemble the unit with the new
		microphone.
6. Receive audio from earpiece speaker	a) Connections to or from lower	Check connection between the antenna and
is weak or distorted.	PCB defective.	the lower PCB. If the connection is OK, pro-
		ceed to b.
	b) Speaker defective.	Temporarily replace the speaker with a
		known good speaker. Ensure good connec-
		tion. Place a call and verify improvement in
		earpiece audio. If fault is cleared, reassemble
		the telephone with the good speaker.

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