A
Set the handset in theNGCheck whether there is aNGCheck R668, R712,
test mode 3, check250 Hz data waveform atR713, R716, R717,
whether deviation of theRT602.C719, C748 and RT602.
TX data is app. 9.0 kHzOK
Dev.
Check handset RF
section.
OK
Set the handset in theNGCheck whether the 250NGCheck IC603 and itsNGCheck handset RF
test mode 6, 926.997467Hz data waveform fromperipheral circuit.section.
MHz (250 Hz ?8 kHzPin 9 of IC603 is fed.OK
Dev.) 1mV output signalOK
from RF test point is
applied. Check whether
the bell ring.
Check whether there is aNGCheck IC602 and itsOK
250 Hz data waveform atperipheral circuit.
Pin 10 of IC602.Place the handset on the
base to charge about 5OK
seconds, then connect
again.Check whether there is aNGCheck R648, R649,
250 Hz data waveform atIC602 and their
Pin 40 of IC608.peripheral circuits.
OK
Check IC608 and its
peripheral circuit.
? 19 ? |
ACEC
TOSHIBA
