TOSHIBA SX2009
Manual de Servicio

7. The voice of the caller cannot be heard (incoming call).
Can the base and handset be connected?

NG

See 3. The base and handset cannot be connected

OK
The 1 kHz, -20 dBm sine waveform is applied to TELline of the base, can the 1 kHz sine waveform from the Q5 collector be fed?

NG

Check the base TEL-line circuit and REPLAY control circuit.

OK
Check whether there is the 1 kHz sine waveform at pin 37 of IC 7.

NG

Check Q5 and its peripheral circuit.

OK
Check whether there is the 1 kHz sine waveform at pin 46 of IC604.

NG

Check IC604 and its peripheral circuit.

OK
Check whether there is the 1 kHz sine waveform at the collector of Q614 and the emitter of Q615.

NG

Check Q614 and Q615.

OK

Check SP801.

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