6. Voice cannot be transmitted to other party (outgoing call).
Can the base and handset be connected? OK The 1 kHz, 2.5mV sine wavefor m i s a p p l i e d t o MC601 + side, in the talk state, 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 on the base unit. OK Can the 1 kHz sine waveform from collector of the Q2 be fed?. OK Check whether there is the 1 kHz sine waveform at TEL-line output. OK Check MC601 of handset. NG Check T1, RL1 and their peripheral circuits. NG Check IC2, IC6, Q2 and their peripheral circuit. NG Check IC2 and its peripheral circuit. NG Check IC602 and its peripheral circuit. NG Check Q606 and its peripheral circuit. NG See 3. The base and handset cannot be connected.
