Toshiba FT-8258, Service Manual

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2. The bell does not ring & page does not ring.
Can the base and handset
be connected? See 3. The base and
handset cannot be
connected.
OK
NG
When the INTCOM key of
the base is pressed, does
Pin 8 of J1 change from
high to low?
Press handset DIAL key
while in TALK MODE.
Can key touch sound be
heard from the ringer?
When the key of the
handset is pressed, can the
pulse output at pin 58 of
IC603 be seen?
NG NG
Check IC603.
OK
At the Q606 collector, can
the pulse wave be seen?
NG
Check R627, R629, Q605
and Q606.
OK
Check RINGER Y601.
OK
NG
Check KEY RUBBER.
OK
Check IC18 and its
peripheral circuit.