Motorola CDMA 800/1900 MHz - Manual (Page 40)

40 May 15, 2006 6809495A97-O
Troubleshooting Q CDMA
Troubleshooting
Table 2. 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 connectors open or
misaligned.
Visually inspect the battery connectors 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 connectors are not at fault,
proceed to c.
c) Transceiver board defective.
Remove the transceiver board. Substitute a known
good transceiver board and temporarily
reassemble the unit. Press the PWR button; if unit
turns on and stays on, disconnect the dc power
source and reassemble the telephone with the
new transceiver board. Verify that the fault has
been cleared. If the fault has not been cleared then
proceed to d.
d) keyboard assembly failure.
Replace the keyboard assembly. Temporarily
connect a +3.6 Vdc supply to the battery
connectors. Depress the PWR button. If unit turns
on and stays on, disconnect the dc power source
and reassemble with the new keyboard assembly.
2. Telephone exhibits poor reception or
erratic operation such as calls frequently
dropping or weak or distorted audio.
a) Antenna assembly defective.
Check to make sure that the antenna pin is
properly connected to the transceiver board
assembly. If connected properly, substitute a
known good antenna. If the fault is still present,
proceed to b.
b) Transceiver board defective.
Replace the transceiver board (refer to 1c). Verify
that the fault has been cleared and reassemble the
unit with the new transceiver board.
3. Display is erratic, or provides partial or
no display. a) Connections to or from
transceiver board defective.
Check general condition of flex and flex connector.
If the flex and connector are good, check that the
flex connector is fully connected. If not, check
connector to transceiver board connections. If
faulty connector, replace the transceiver board. If
connector is not at fault, proceed to b.
b) Transceiver board assembly
defective.
Replace the transceiver board (refer to 1c). Verify
that the fault has been cleared and reassemble the
unit with the new transceiver board.
4. Incoming call alert transducer audio
distorted or volume is too low.
Faulty transceiver board assembly.
Replace the transceiver board (refer to 1c). Verify
that the fault has been cleared and reassemble the
unit with the new transceiver board.
5. Telephone transmit audio is weak.
(usually indicated by called parties
complaining of difficulty in hearing voice). a) microphone obstructed by user
while holding the phone Verify transmit audio quality. If transmit audio
quality is still weak and microphone is not
obstructed, proceed to b.
b) keyboard assembly defective Replace the keyboard assembly with a know good
keyboard assembly. Verify that the fault is cleared
and reassemble the unit with the new keyboard
assembly. If this does not clear the fault, reinstall
the original keyboard assembly and proceed to c