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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 a waveform on Pin 1 of IC2 (Line 1) or Pin 7 of IC11 (Line 2). OK Check whether there is an audio waveform on Pin 3 of IC15 (Line 1) or Pin 1 of IC15 (Line 2). OK Check whether there is an audio waveform on Pin 1 of IC16. OK NG Check IC16. NG NG Check IC2, RL1, Q8 and T1 (Line1) or IC11, RL2, Q11 and T2 (Line2).
Check IC15.
Check whether there is an audio waveform on Pin 14 of IC20. OK
NG
Check IC20.
Check whether there is a waveform on Pin 5 of IC19. OK
NG
Check IC19.
Check FC701, WA701 and SP701.
6-2. Voice cannot be transmitted to the calling party(OUTGOING CALL).
Check whether there is an audio waveform on Pin 23 of IC20. OK NG Check MC401, Q401 and IC20.
Check whether there is an audio waveform on Pin 2 of IC1 (Line 1) or Pin 11 of IC6 (Line 2). OK
NG
Check IC1 (Line 1) or IC6 (Line 2).
Check whether there is an audio waveform on Pin 7 of IC2 (Line 1) or Pin 1 of IC11 (Line 2). OK
NG
Check IC2 (Line 1) or IC11 (Line 2).
Check Q1, T1, RL1 and Q8 (Line 1) or Q7, T2, RL2 and Q11 (Line 2).
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