20
4. Will not dial out.
(TONE)
(PULSE)
Check whether there is a
DTMF waveform on Pin 1 of
IC10.
Check whether there is a
DTMF waveform on Pin1 of
IC1.
Check the collector of Q6.
Check RL1.
Check IC10, Q15 and their
peripheral circuits.
OK
NG
Check IC1.
NG
Check Q6, R49 and R64.
NG
OK
OK
Check whether there is a
pulse on Pin 10 of IC10.
Check IC10
NG
Summary of Contents for FT-8509
Page 2: ... 121 5 30 36 6 59 0 18 25 66 7 3 21 70 83 38 6 1 3 1 XJ1 4 ...
Page 11: ...9 BLOCK DIAGRAMS Base Unit ...
Page 12: ...10 Handset Unit ...
Page 13: ...6 0 7 5 06 DVH 8QLW 0DLQ 45 44 ...
Page 15: ... DQGVHW 0DLQ 48 47 ...
Page 30: ...30 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Page 31: ...31 Base Unit Key PCB ...
Page 32: ...32 Handset Main PCB ...
Page 33: ...33 WIRING DIAGRAMS Base Unit ...
Page 34: ...34 Handset ...
Page 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 ...
Page 53: ......