Toshiba FT-7007LR 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 S2 of
the base is pressed, does
pin22 of IC3 change from
high to low?
OK
Check IC3 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 IC502 be seen?
At the Q505 collector, can the
pulse wave be seen?
Check RINGER SP501.
NG
Check S2, R58 and R73.
14
NG
OK
NG
OK
Check IC502.
Check R565, R586 and Q505.