38 April 14, 2004 6809471A72-O
Troubleshooting V80
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.
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.
6. Receive audio from earpiece speaker is
weak or distorted.
a) Connections to or from
transceiver board assembly
defective.
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.
b) Blade assembly defective. Temporarily replace the blade assembly with a
known good assembly. If fault has been cleared,
reassemble with the new blade assembly. If fault
not cleared, proceed to c.
c) Antenna assembly defective. 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.
d) Transceiver board assembly
defective.
Replace the transceiver board assembly (refer to
1c). Verify that the fault has been cleared and
reassemble with the new transceiver board
assembly.
7. Telephone will not recognize or accept
SIM.
a) SIM defective. 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.
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.
8. Phone does not sense when rotator is
opened or closed (usually indicated by
inability to answer incoming calls by
opening the blade, or inability to make
outgoing calls).
a) Blade assembly defective. Temporarily replace the blade assembly with a
known good assembly. If fault has been cleared,
reassemble with the new blade assembly. If fault
not cleared, 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.
9. Vibrator feature not functioning. 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.
Table 4. Level 1 and 2 Troubleshooting Chart (Continued)
Symptom Probable Cause Verification and Remedy
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