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2. Sending Path problem
The voltage at
R299
is 0.99V ~ 1.03V?
Yes
A few
tens or hundreds
of mV of signals at C223
are measured ?
Yes
The ABB is out of order.
Change the board.
Set audio part of the test
equipment to the echo mode.
No
Resolder the
R210,R212,R299
No
soldering of C223
soldering of J201
The earphone is OK?
The ABB is out of order.
Change the board.
-76-
The
is OK?
Yes
The
is OK?
Yes
Yes
No
Resolder
the C223
No
Resolder
the J201
No
Change the
Earphone.
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