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3.4 Calling receiver sound has poor quality
Calling
quality in receiver
Measure the receiver's
resistance, is the value
32ohm?
Check the contact is good between
receiver spring and contact point. Re
assemble the receiver and whether the
phone work is good.
Checks the SMT quality of bead.
Whether these parts are SMT
good? The phone is work good
after heating these parts?
Replace the U1301
sound
poor
Y
N
N
Replace the
N
receiver.
Y
OK
Y
OK
14
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