44 April 20, 2007 6809511A13-O
Troubleshooting V3 ’06
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.
Refer service to a Level 3 service center for
replacement.
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.
Refer service to a Level 3 service center for
replacement.
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) Transceiver board assembly
defective.
Refer service to a Level 3 service center for
replacement.
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) 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) 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.
Refer service to a Level 3 service center for
replacement.
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.
Refer service to a Level 3 service center for
replacement.
Table 4. Level 1 and 2 Troubleshooting Chart (Continued)
SYMPTOM PROBABLE CAUSE VERIFICATION AND REMEDY
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