TOSHIBA FT8808
Instrukcja Serwisowa

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 ring? OK When the key of the handset is pressed, can the pulse output at pin 58 of IC603 be seen? OK At the Q606 collector, can the pulse wave be seen? OK Check RINGER Y601. NG Check R627,R629,R667, Q605,Q606, and Q613. NG See 3. The base and handset cannot be connected.

NG

NG

Check IC603.

When the PAGE SW S1 of the base is pressed, does pin19 of IC5 change from high to low?

NG

Check R40, R42 and S1.

Check IC5 and its peripheral circuit.