Toshiba FD-9839, Service Manual

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21
6. Voice cannot be transmitted to other party (outgoing call).
Can the base and handset be
connected? See 3. The base and handset
cannot be connected.
OK
NG
T h e 1 k H z , 3 . 3 m V s i n e
wave fo r 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? Check Q606 and its
peripheral circuit. NG
OK
Check whether there is the
1 kHz sine waveform at pin
12 of IC602. Check IC602 and the
peripheral circuit. NG
OK
Check whether there is the
1 kHz sine waveform at pin
22 of IC2. NG
OK
Check whether there is the
1 kHz sine waveform at the
Q4 collector. Check IC2, Q4 and the
pripheral circuit. NG
OK
Check whether the 1 kHz sine
wavefor m from TEL-line
output is fed. Check T1, RL1 and their
pripheral circuits. NG
OK
Check MC601 of handset.
Check IC2 and the peripheral
circuit.