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6. Voice cannot be transmitted to other party (outgoing call).
Can the base and handset
be connected?
OK
The 1 kHz, 12.5 mV sine
waveform is applied to
MC601
side, can the
1 kHz sine waveform from
pin 7 of IC601 be fed?
OK
Check whether there is the
1 kHz sine waveform at
pin 10 of IC601.
OK
Check whether there is the
1 kHz sine waveform at
pin 9 of 601.
OK
TX output signal from the
handset is detected by the
liner detecter, can the 1 kHz
sine waveform be fed?
OK
Check whether there is the
1 kHz sine waveform at
pin 1 of J1 on the base unit.
OK
Check whether there is the
1 kHz sine waveform at
pin 5 of IC2.
OK
Check whether there is the
1 kHz sine waveform at
pin 3 of IC2.
OK
Check whether there is the
1 kHz sine waveform at the
Q2 collector.
OK
Check whether the 1 kHz
sine waveform from
TEL-line output is fed.
OK
Check MC601 of handset.
NG
See 3. The base and
handset cannot be
connected.
NG
Check Q608 and its
peripheral circuit.
NG
Check IC601 and its
peripheral circuit.
NG
Check VR601 and its
peripheral circuit.
NG
Check handset RF unit.
NG
Check base RF unit.
NG
Check RT1, Q1 and their
peripheral circuits.
NG
Check IC2 and its
peripheral circuit.
NG
Check IC3, Q2 and their
peripheral circuits.
NG
Check T1, RL1 and their
peripheral circuits.
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