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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
"MOD" of RF unit.
OK
Check handset RF unit.
Check whether the 250
NG
Hz data waveform from
pin 9 of IC601 is fed.
OK
Check whether there is a
NG
250 Hz data waveform at
the Q602 collector.
OK
Check whether there is a
NG
250 Hz data waveform at
pin 40 of IC604.
OK
Check IC604 and its
peripheral circuit.
— 17 —
Check RT603, R641,
R642, R643, R644,
R645 and C653.
Check IC601, Q601 and
NG
their peripheral circuit.
OK
Check RT602, Q602 and
their peripheral circuit.
Check R628, R629,
IC603 and their
peripheral circuit.
Check handset RF unit.
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