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
Check IC604.
while in TALK MODE.pressed, can the pulse output
Can key touch sound beat pin 38 of IC604 be seen?
heard from the ringer?
OK
OK
At the Q608 collector, can theNG
Check R654, R657 and D602.
pulse wave be seen?
OK
Check RINGER SP601.
NG
When the PAGE SW of the
base is pressed, does pin20Check R55, R77 and S1.
of IC5 change from high to
low?
OK
Check IC5 and its peripheral
circuit.
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