Motorola V3 Service Manual page 43

Level 1 and 2 Service Manual
Table 3. Level 1 and 2 Troubleshooting Chart (Continued)
SYMPTOM
5. Telephone transmit audio is weak
(usually indicated by called parties
complaining of difficulty in hearing voice).
6. Receive audio from earpiece speaker is
weak or distorted.
7. Telephone will not recognize or accept
SIM.
8. Phone does not sense when flip is
opened or closed (usually indicated by
inability to answer incoming calls by
opening the flip, or inability to make
outgoing calls).
6809497A15-A
PROBABLE CAUSE
a) Microphone connections to the
transceiver board assembly defective.
b) Microphone defective.
c) Transceiver board assembly
defective.
a) Connections to or from transceiver
board assembly defective.
b) Flip assembly defective.
c) Antenna assembly defective.
d) Transceiver board assembly
defective.
a) SIM defective.
b) Flip assembly defective.
c) Transceiver board assembly
defective.
a) Flip assembly defective.
b) Transceiver board assembly
defective.
January 31, 2006
VERIFICATION AND REMEDY
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.
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.
Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble with the new transceiver board
assembly.
Gain access to the transceiver board assembly
as described in the procedures. Check flex and
the flex connector from the flip assembly to the
transceiver board assembly. If flex is at fault,
replace flip assembly. If flex connector is at fault,
proceed to d. If connection is not at fault,
proceed to b.
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.
Check that the antenna is installed correctly. If
the antenna is installed correctly, substitute a
known good antenna assembly. If this does not
clear the fault, reinstall the original antenna
assembly and proceed to d.
Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble with the new transceiver board
assembly.
Check the SIM contacts for dirt. Clean if
necessary and check if fault has been cleared. If
the contacts are clean, insert a known good SIM
into the telephone. Power up the phone and
confirm that the SIM has been accepted. If the
fault no longer exists, replace the defective SIM.
If the SIM is not at fault, proceed to b.
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.
Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble with the new transceiver board
assembly.
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 b.
Replace the transceiver board assembly (refer
to 1c). Verify that the fault has been cleared and
reassemble with the new transceiver board
assembly.
Troubleshooting
43