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Receiver low voice or no voice
Replace the
receiver.
Customer Service
Receiver is low.
Set the phone as
handsfree mode
YES
Check if the receiver
YES
is broken or damaged
NO
Test if there's sound from
receiver with multimeter
YES
Measure the signal
with oscillograph
under calling mode
NO
Replace CPU
U101 MT6250
END
NO
Check if LS402
is damaged.
NO
Re-solder clean LS401
NO
Replace receiver
32
Service Manual
YES
NO
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