Toshiba FT-8258, Руководство по обслуживанию

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6. TROUBLE WITH SPEAKERPHONE MODE
6-1. The voice of the caller cannot be heard (INCOMING CALL).
OK
Check IC1 (Line 1) or IC8
(Line 2).
Check whether there is an
audio waveform on Pin 11
of IC1 (Line 1) or Pin 8 of
IC8 (Line 2).
NG
OK
Check IC19 and IC20.
Check whether there is an
audio waveform on Pin 14
of IC20.
NG
OK
Check W702 and SP701.
Check IC16, RL1 and Q8
(Line 1) or IC16, RL2 and
Q11 (Line 2).
Check whether there is an
audio waveform on Pin 1
of IC16.
NG
6-2. Voice cannot be transmitted to the calling party (OUTGOING CALL).
C heck M C 401 and IC 20.
C heck w hether there is an
audio w aveform on P in 23
of IC 20.
N G
O K
C heck IC 1 (Line 1) or IC 8
(Line 2).
C heck w hether there is an
audio w aveform on P in 2
of IC 1 (Line 1) or Pin 3 of
IC 8 (Line 2).
N G
O K
C heck IC 2 (Line 1) or IC 11
(Line 2).
C heck w hether there is an
audio w aveform on P in 7
of IC 2 (Line 1) or Pin 1 of
IC 11 (Line 2).
N G
O K
C heck Q 1, T1, R L1 and Q 8
(Line 1) or Q 7, T 2, R L2 and
Q 11 (Line 2).