Toshiba FT-7007LBR, Руководство по обслуживанию

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16
Check the TX FREQUENCY
on the handset unit. Check Q503, D501 and their
peripheral circuits.
Try adjust TX VCO VOLTAGE
again.
OK
NG
Check the TX POWER on the
handset unit. Check Q503, Q502, FT504
and their peripheral circuits.
OK
NG
Set the handset in the test
mode 3. Check whether
deviation of the TX data is
app. 5kHz Dev. Check whether there is a
200Hz data waveform at pin
46 of IC502.
NG NG
Check IC502.
Check R547, R549, R540,
R542, R539 and C560.
OK
Set the handset in the test
mode 10, 46.77MHz (200Hz
5kHz Dev.) 1mV output signal
from ANT IN is applied.
Check whether the bell ring. Check whether there is a
200Hz data waveform at Pin
27 of IC501.
OK
NG NG Check MO501, FT501, FT502,
L503 and their peripheral
circuits.
Try adjust RX VCO VOLTAGE
and DISCRI VOLTAGE again.
Place the handset on the base
to charge about 5 seconds,
then connect again. Check whether there is a
200Hz data waveform at Pin
23 of IC501.
NG
NG
Check R507, C518 and C517.
Check the charge circuit of
base and handset. Check whether there is a
200Hz data waveform at Pin
21 of IC502. NG
Check R559.
Check IC502 and its peripheral
circuit.
A
OK
OK
OK
OK
Check whether the handset is
able to set in the test mode 2. Check the power peripheral
circuit, IC502 and its peripheral
circuit. NG
OK