Motorola W220 Service Manual

June 22, 2006 49
Level 1-2 Service Manual Troubleshooting
PRELIMINARY
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
defective.
Measure battery voltage across a 50 ohm (>1
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
misaligned.
Visually inspect the battery terminals on both
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 as described in the
procedures. 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
erratic operation such as calls frequently
dropping or weak or distorted audio.
Connections to or from lower PCB
defective.
Check connection between the antenna and the
lower PCB.
3. Display is erratic, or provides partial or
no display.
a) FPC cable faulty. Check general condition of FPC cable and
upper PCB. If the FPC cable and upper PCB are
good, proceed to b.
b) LCM defective. Replace the LCM. Verify that the fault has been
cleared and reassemble the unit with the new
LCM.
4. Incoming call alert transducer audio
distorted or volume is too low.
Speaker defective. Replace the speaker as described in the
procedures. Verify that the fault has been
cleared and reassemble the unit with the new
speaker.
5. Telephone transmit audio is weak
(usually indicated by called parties
complaining of difficulty in hearing voice).
Microphone defective. Replace the microphone as described in the
procedures. Verify that the fault has been
cleared and reassemble the unit with the new
microphone.
6. Receive audio from earpiece speaker is
weak or distorted.
a) Connections to or from lower PCB
defective.
Check connection between the antenna and the
lower PCB. If the connection is OK, proceed to
b.
b) Speaker defective. Temporarily replace the speaker with a known
good speaker. Ensure good connection. Place a
call and verify improvement in earpiece audio. If
fault is cleared, reassemble the telephone with
the good speaker.
7. Telephone will not recognize or accept
SIM card.
SIM card defective. 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 no longer exists, replace the defective
SIM card.

Motorola W220 Specifications

General

Rear camera	No
FM radio	Yes
Ringer type	Polyphonic
Display type	CSTN
Display resolution	128 x 128 pixels
Display number of colors	65536 colors
Internal memory	0.5 MB
Multimedia Messaging Service (MMS)	Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network
Product color	Pink
Talk time (2G)	8 h
Battery capacity	850 mAh
Standby time (2G)	290 h
Data network	GPRS
Personal info management (PIM)	Alarm clock, Calendar

Weight and Dimensions

Depth	46.7 mm
Width	16.7 mm
Height	95 mm
Weight	93 g