A
Press ?3? key, checkNGCheck whether there is aNGCheck whether there isNGCheck IC602 and its
whether deviation of thepulse data waveform ata pulse data waveform atperipheral circuit.
TX data is app. ?23kHzC630.pin 40 of IC602.
~ ?45kHz Dev.
OKOK
Check R656, C633,
Check handset RF unit.
R654, C631 and C630.
OK
Press ?5? key, 926.49522NGCheck whether there isNGCheck handset RF unit
MHz (30kHz ?30kHzthe 30kHz waveform at and the peripheral circuit
Dev.) 1mV output signal C605.of IC601, Q605, FT601,
from RF jack is applied.FT602.
OK
Check whether the bell
ring.
OK
Check whether there is aNGCheck R620, R621,
30kHz pulse waveform atR623, R625, C605, C607,
Place the handset on the
pin 34 of IC602.C608, D611, IC602 and
base to charge about 10
their peripheral circuit.
seconds, then connectOK
again.
Check whether theNGCheck IC601 and its
voltage at pin 10 ofperipheral circuit.
IC601 is more than 1V.
OK
Check C606, IC606 and
its peripheral circuit.
16 |
ACEC
