Motorola V235 Service Manual page 46

Troubleshooting
Table 4. 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.
46
PROBABLE CAUSE
b) Faulty transceiver board
assembly.
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.
c) Transceiver board assembly
defective.
April 03, 2006
VERIFICATION AND REMEDY
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.
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 the unit 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 to make sure 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 unit 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.
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.
V235 GSM
6809495A43-C