2. The bell does not ring & page does not ring.
Can the base and handset beNGSee 3. The base and handset
connected?cannot be connected.
OK
Press handset DIAL keNGyWhen the key of the handset isNG
while in TALK MODE.pressed, can the pulse outputCheck IC603.
Can key touch sound beat pin 58 of IC603 be seen?
heard from the ringer?OK
OK
At the Q616 collector, can theNGCheck R688, R673, R689,
pulse wave be seen?R672, R629, Q616 and Q617.
OK
Check RINGER Y601.
When the PAGE SW of theCheck R55, R77 and S1.NG
base is pressed, does pin32
of IC2 change from high to
low?
OK
Check IC4 and its peripheral
circuit.
14 |