Table of Contents
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Set the handset in the test
mode 3, check whether
deviation of the TX data is
app. 7 kHz Dev.
OK
Set the handset in the test
mode 6, 926.994344 MHz
(250 Hz ±7 kHz Dev.) 1mV
output signal from RF jack
is applied. Check whether
the bell ring.
OK
Place the handset on the
base to charge about
5 seconds, then connect
again.
NG
Check whether there is a
250Hz data waveform at
pin 9 of J601.
Check handset RF unit.
NG
Check whether the 250 Hz
data wareform from pin 1
of J601 is fed.
Check whether there is a
250 Hz data waveform at
the Q601 collector.
Check whether there is a
250 Hz data waveform at
pin 40 of IC603.
Check IC603 and its
peripheral circuit.
— 13 —
NG
OK
NG
OK
NG
OK
NG
OK
Check VR601, R619, R632,
R634, R635, R636
and C611.
Check handset RF unit.
Check VR602, Q601 and
their peripheral circuits.
Check Q602, Q604 and
their peripheral circuits.
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