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6. TROUBLE WITH SPEAKERPHONE MODE
6-1. The voice of the caller cannot be heard (INCOMING CALL).
Check whether there is an
audio waveform on Pin 11
of IC1 (Line 1) or Pin 8 of
IC8 (Line 2).
OK
Check whether there is an
audio waveform on Pin 1
of IC16.
OK
Check whether there is an
audio waveform on Pin 14
of IC20.
OK
Check W702 and SP701.
6-2. Voice cannot be transmitted to the calling party (OUTGOING CALL).
Check whether there is an
audio waveform on P in 23
of IC20.
O K
Check whether there is an
audio waveform on P in 2
of IC1 (Line 1) or Pin 3 of
IC 8 (Line 2).
O K
Check whether there is an
audio waveform on P in 7
of IC2 (Line 1) or Pin 1 of
IC11 (Line 2).
O K
Check Q 1, T1, RL1 and Q 8
(Line 1) or Q 7, T 2, RL2 and
Q 11 (Line 2).
NG
NG
NG
NG
NG
NG
— 30 —
Check IC1 (Line 1) or IC8
(Line 2).
Check IC16, RL1 and Q8
(Line 1) or IC16, RL2 and
Q11 (Line 2).
Check IC19 and IC20.
Check M C401 and IC20.
Check IC1 (Line 1) or IC8
(Line 2).
Check IC2 (Line 1) or IC11
(Line 2).
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