Toshiba FT-8509 Service Manual page 20

4. Will not dial out.
(TONE)
Check whether there is a
DTMF waveform on Pin 1 of
IC10.
OK
Check whether there is a
DTMF waveform on Pin1 of
IC1.
(PULSE)
Check whether there is a
pulse on Pin 10 of IC10.
OK
Check the collector of Q6.
OK
Check RL1.
NG
Check IC10, Q15 and their
peripheral circuits.
NG
Check IC1.
NG
Check IC10
NG
Check Q6, R49 and R64.
20