Toshiba FT-7807R, Руководство по обслуживанию

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6. Voice cannot be transmitted to other party (outgoing call).
Check the handset MIC
sensitivity.
Check the handset TX AF
circuit (around Pins 17,
19~21 of IC504).
At the MIC of the handset,
does the bias voltage exist?
Check the base RX
TEL-line out.
Check R548, R534, R532
and C555.
In the base, with the SG
standard modulation of
1kHz 3kHz deviation and
input signal of 1mV, can
the sine wave be seen at
Pin 25 of IC1?
Check the base IF circuit
(around Pins 26~29 of IC1).
Then, can the sine wave
be seen at Pin 24 of IC1? Check circuit around Pin 24
of IC1.
Then, can the sine wave be
seen at the Q2 collector?
Check Q2 and the
sorrounding circuit of Q2.
NG
OK
OK
OK
NG
NG
OK
NG
NG
OK
OK
NG
Check the sorrounding
circuit of T1.
Check the base RX
TEL-line out.
Check RX RF and mixer
circuit of the base (around
Q1) as well as FT3 and
FT2.
Check the base RX
sensitivity.
The handset MIC is
defective.
NG
OK OK
NG