Motorola V600, Руководство по обслуживанию, Страница: 45 / 56

6809468A79-O October 10, 2003 45
Level 1 and 2 Service Manual Troubleshooting
c) Transceiver board assembly
defective. Remove the transceiver board assembly.
Substitute a known good assembly and
temporarily reassemble the unit. Press and hold
the PWR button; if unit turns on and stays on,
disconnect the dc power source and reassemble
the telephone with the new transceiver board
assembly. 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. Press and hold 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 assembly
defective. Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble the unit with the new transceiver
board assembly.
3. Display is erratic, or provides partial or
no display. a) Transceiver board connections
faulty. Remove rear chassis assembly from unit, check
general
condition of flexible printed cable (flex). If the flex
is good, check that the flex connector is fully
pressed down. If not, check connector to
transceiver board connections. If faulty
connector, replace the transceiver board
assembly. If connector is not at fault, proceed to
b.
b) Flip assembly defective. Temporarily replace the flip assembly with a
known good assembly. If fault has been cleared,
reassemble with the new flip assembly. If fault
not cleared, proceed to c.
c) Transceiver board assembly
defective. Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble the unit with the new transceiver
board assembly.
4. Incoming call alert transducer audio
distorted or volume is too low. Faulty transceiver board assembly. Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble the unit with the new transceiver
board assembly.
5. Telephone transmit audio is weak.
(usually indicated by called parties
complaining of difficulty in hearing voice). a) Microphone connections to the
transceiver board assembly defective. Gain access to the microphone as described in
the procedures. Check connections. If connector
is faulty proceed to c; if the connector is not at
fault, proceed to b.
b) Microphone defective. Gain access to microphone. Disconnect and
substitute a known good microphone. Place a
call and verify improvement in transmit signal as
heard by called party. If good, reassemble with
new microphone. If microphone is not at fault,
reinstall original microphone and proceed to c.
Table 4. V600 Telephone: Level 1 and 2 Troubleshooting Chart (Continued)
SYMPTOM PROBABLE CAUSE VERIFICATION AND REMEDY