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P7382i / P7389i
SYMPTOM
4. Incoming call alert transducer
audio distorted or volume is too
low.
5. Personal telephone transmit
audio is weak, (usually indicated by
called parties complaining of
difficulty in hearing voice from
personal phone).
6. Personal telephone receive audio
is weak and/or distorted. (From
speaker)
7. Personal telephone will not
recognize/accept SIM card
8. Phone does not sense when flip is
Opened or closed (L189 Only)
(usually indicated by inability to
answer incoming calls by opening
the flip, or inability to make
outgoing calls).
31
of 50
PROBABLE CAUSE
a) Faulty alert Transducer
b) Main RF / Logic PCB
defective
a) Microphone connections to
The main RF / Logic board are
defective.
b) Microphone defective
c) Logic/RF Board Assembly
defective.
a) Connections to/from speaker
and Logic/RF Circuit board
defective.
b) Earpiece Speaker defective.
c) Antenna assembly is
defective.
d) Logic/RF Board Assembly
Defective.
a) SIM card defective
b) Logic/RF Board Assembly
Defective.
a) Magnet in flip defective
European Customer Services
VERIFICATION AND REMEDY
Remove suspect alert transducer from rear housing
and replace with known good alert. If fault does not
clear proceed to b)
Replace Logic/RF Board Assembly (refer to
symptom 1c). Verify that the fault has been cleared
and re-assemble the unit with the new PCB.
Gain access to the Microphone as described in the
DISASSEMBLY instructions in this manual. . Check
connections. If connector is faulty proceed to c if the
connector is OK, proceed to b.
Gain access to microphone. Disconnect and
substitute a known good Microphone. Place a call
and verify as heard by called party. If good, re-
assemble portable with new Microphone. If
Microphone is not at fault, re-install original
Microphone and proceed to c.
Replace Logic/RF Board Assembly (refer to
symptom 1c). Verify that the fault has been cleared
and re-assemble the unit with the new PCB.
Gain access to Logic/RF board as described in the
DISASSEMBLY instructions in this manual. Check
pads on the Logic/RF circuit board. Clean pads if
necessary. If pad is at fault proceed to d. If
connection is not at fault, Proceed to b.
Remove speaker from front housing and insert
known good speaker. Place a call and verify
improvement in earpiece audio. If better, reassemble
the phone with the good speaker. If it was no better
then proceed to c.
Attempt a re-phasing of the unit and recheck the
symptom. If symptom is the same but unit re-phases
correctly, check to make sure the antenna
connector is correctly soldered to the main board and
that the antenna is fitted correctly. If ok, substitute a
known good antenna assembly. If this does not cure
the fault, re-install the original assembly then
proceed to d.
d) Replace Logic/RF Assembly (refer to symptom
1c). Verify that the fault has been cleared and
Re-assemble the unit with the new PCB.
Initially check that the contacts on the card are not
dirty. Clean if necessary, and check if fault has been
eliminated. If the contacts are clean, insert a
Known good SIM card into the portable telephone.
Power up the unit and confirm whether or not the
card has been accepted. If the fault no longer
Exists, the defective SIM card should be replaced. If
the SIM card is not at fault, proceed to b.
Replace Logic/RF Board Assembly (refer to
symptom 1c). Verify that the fault has been cleared
and re-assemble the unit with the new PCB.
Replace Front / flip assembly with known good one,
refer to the DISASSEMBLY instructions in this
manual. Place call to portable phone and verify
ability to answer by opening flip. If faulty rebuild
phone with new front / flip Assy. If fault is still
present, replace original front/flip assembly and
proceed to b.
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