6. Voice cannot be transmitted to other party (outgoing call).
Can the base and handset be connected? OK The 1 kHz, 3.3mV sine wavefor m i s a p p l i e d t o MC601 + side, can the 1 kHz sine waveform from collector of Q606 be fed? OK Check whether there is the 1 kHz sine waveform at pin 12 of IC602. OK Check whether there is the 1 kHz sine waveform at pin 22 of IC2. OK Check whether there is the 1 kHz sine waveform at the Q4 collector. OK Check whether the 1 kHz sine wavefor m from TEL-line output is fed. OK Check MC601 of handset. NG Check T1, RL1 and their pripheral circuits. NG Check IC2, Q4 and the pripheral circuit. NG Check IC2 and the peripheral circuit. NG Check IC602 and the peripheral circuit. NG Check Q606 and its peripheral circuit. NG See 3. The base and handset cannot be connected.
