22
6. TROUBLE WITH SPEAKERPHONE MODE
6-1. The voice of the caller cannot be heard (INCOMING CALL).
6-2. Voice cannot be transmitted to the calling party (OUTGOING CALL).
Check whether there is an
audio waveform on Pin 7 of
IC1.
Check whether there is an
audio waveform on Pin 1 of
IC6.
Check IC1.
OK
NG
Check IC6, RL1 and Q6.
NG
Check whether there is an
audio waveform on Pin 15 of
IC7.
OK
Check IC7.
NG
OK
Check WF701 and SP701.
Check whether there is an
audio waveform on Pin 4 of
IC7.
Check whether there is an
audio waveform on Pin 1 of
IC1.
Check MC251 and IC7.
OK
NG
Check IC1.
NG
Check whether there is an
audio waveform on collector
of Q3.
OK
Check Q3.
NG
OK
Check Q4, T1, RL1 and Q6.
Содержание FT-8509
Страница 2: ... 121 5 30 36 6 59 0 18 25 66 7 3 21 70 83 38 6 1 3 1 XJ1 4 ...
Страница 11: ...9 BLOCK DIAGRAMS Base Unit ...
Страница 12: ...10 Handset Unit ...
Страница 13: ...6 0 7 5 06 DVH 8QLW 0DLQ 45 44 ...
Страница 14: ...13 Base Unit ke NOTES 1 RESISTANCE VALUES ARE SHOWN IN OHMS UNLESS OTHERWISE NOTED K KILO OHM M MEG OHM ...
Страница 15: ... DQGVHW 0DLQ 48 47 ...
Страница 30: ...30 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 31: ...31 Base Unit Key PCB ...
Страница 32: ...32 Handset Main PCB ...
Страница 33: ...33 WIRING DIAGRAMS Base Unit ...
Страница 34: ...34 Handset ...
Страница 35: ...35 EXPLODED VIEWS AND MECHANICAL PARTS LIST Base Unit SPEAKER KEY PCB RF MODULE BASE MAIN PCB ANTENNA ...
Страница 37: ...37 7 8 4 1 16 17 17 5 10 15 11 12 2 9 6 13 14 3 17 Handset RF MODULE HANDSET MAIN PCB ASSY ...
Страница 53: ......