Motorola CDMA 800/1900 MHz 用户手册

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