Toshiba FT-8009 Service Manual page 14

3. The base and handset cannot be connected.
Check whether the base
is able to set in the test
mode 1.
OK
Check the TX POWER
and the TX FREQUENCY
on the base unit.
OK
Set the base in the test
mode 3, check whether
deviation of the TX data
is app. 8 kHz Dev.
OK
Set the base in the test
mode 8, 902.952467
MHz (250 Hz ±8 kHz
Dev.) 1mV output signal
from RF jack is applied.
Can the status LED be
lighted?
OK
Check whether the
handset is able to set in
the test mode 1.
OK
Check the TX POWER
and the TX FREQUENCY
on the handset unit.
OK
A
NG Check IC5 and its
peripheral circuit.
NG
Check base RF unit.
Check whether there is a
NG
250 Hz data waveform at
"MOD" of RF unit.
OK
Check base RF unit.
NG Check whether there is a
250 Hz data waveform at
pin 9 of IC3.
OK
Check whether there is a
250 Hz data waveform at
the Q2 collector.
OK
Check whether there is a
250 Hz data waveform at
pin 38 of IC5.
OK
Check IC5 and its
peripheral circuit.
NG Check IC404 and its
peripheral circuit.
NG
Check handset RF unit.
Check RT3, R40, R68,
NG
R69, R53, R70 and C79.
NG Check IC3, Q1 and their
peripheral circuit.
OK
NG Check RT2, Q2 and their
peripheral circuit.
NG Check R42, R46, IC1 and
their peripheral circuit.
15
NG
Check base RF unit.