Toshiba FT-8808 Service Manual page 22

4. Cannot make a phone call (pulse).
Can the base and handset
be connected?
OK
While in TALK MODE,
press dial key of the
handset.
Check whether square
waveform from pin 58 of
IC5 is fed.
OK
Check Q15, RL1 and their
peripheral circuits.
5. Cannot make a phone call (tone).
Can the base and handset
be connected?
OK
While in TALK MODE,
press dial key of the
handset. Can tone
waveform from pin20 of
IC11 is fed?
OK
Can tone signal be heard
from the handset speaker?
OK
Check the base TEL-line
circuit and RELAY control
circuit.
NG
See 3. The base and
handset cannot be
connected.
NG
Check IC5.
NG
See 3. The base and
handset be cannot be
connected.
NG
Check IC11 and
its peripheral circuits.
NG
Check IC3, Q2 and their
peripheral circuits.