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A
Set the handset in the
NG
test mode 3, check
whether deviation of the
TX data is app. 9.0 kHz
Dev.
OK
Set the handset in the
NG
test mode 6, 926.997467
MHz (250 Hz ±8 kHz
Dev.) 1mV output signal
from RF test point is
applied. Check whether
the bell ring.
OK
Place the handset on the
base to charge about 5
seconds, then connect
again.
Check whether there is a
NG
250 Hz data waveform at
RT602.
OK
Check handset RF
section.
Check whether the 250
NG
Hz data waveform from
Pin 9 of IC603 is fed.
OK
Check whether there is a
NG
250 Hz data waveform at
Pin 10 of IC602.
OK
Check whether there is a
NG
250 Hz data waveform at
Pin 40 of IC608.
OK
Check IC608 and its
peripheral circuit.
— 19 —
Check R668, R712,
R713, R716, R717,
C719, C748 and RT602.
Check IC603 and its
NG
peripheral circuit.
OK
Check IC602 and its
peripheral circuit.
Check R648, R649,
IC602 and their
peripheral circuits.
Check handset RF
section.
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