Toshiba FT-8009 Service Manual page 13

2. The bell does not ring & page does not ring.
Can the base and handset be
connected?
OK
Press handset DIAL key
while in TALK MODE.
Can key touch sound be
heard from the ringer?
OK
When the PAGE SW of the
base is pressed, does pin20
of IC5 change from high to
low?
OK
Check IC5 and its peripheral
circuit.
NG See 3. The base and handset
cannot be connected.
NG
When the key of the handset is
pressed, can the pulse output
at pin 38 of IC404 be seen?
At the Q408 collector, can the
pulse wave be seen?
Check RINGER Y401.
NG
Check R55, R77 and S1.
14
NG
OK
NG
OK
Check IC404.
Check R454, R457 and D402.