Toshiba FT-8808, Service Manual

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Can the base and handset
be connected?
The 1 kHz 77.5 mV sine
waveform is applied to
TEL-line of the base, can the
1 kHz sine waveform from
the Q2 collector be fed?
Check whether there is the
1 kHz sine waveform at
pin 7 of IC2.
Check whether there is the
1 kHz sine waveform at
pin 10 of IC2.
Check whether there is the
1 kHz sine waveform at
pin 9 of J1.
TX output signal from the
base is detected by the
liner detector, can the 1 kHz
sine waveform be fed?
Check whether there is the
1 kHz sine waveform at
pin 1 of J601 on the
handset unit.
Check whether there is the
1 kHz sine waveform at
pin 5 of IC601.
Check whether there is the
1 kHz sine waveform at the
pin 3 of IC601.
Check whether there is the
1 kHz sine waveform at
pin 1 of J602.
Check SP801 and WA801.
See 3. The base and
handset cannot be
connected.
Check the base TEL-line
circuit and RELAY control
circuit.
Check IC3 and its
peripheral circuit.
Check IC2 and its
peripheral circuit.
Check RT2 and its
peripheral circuit.
Check base RF unit.
Check handset RF unit.
Check VR602, Q601 and
hteir peripheral circuits.
Check IC601 and its
peripheral circuit.
Check Q603 and its
peripheral circuit.
7. The voice of the caller cannot be heard (incoming call).