6. Voice cannot be transmitted to other party (outgoing call).
Can the base and handset beNGSee 3. The base and handset
connected?cannot be connected.
OK
The 1 kHz, 9.0mV sineNGCheck Q404 and its
waveform is applied toperipheral circuit.
MC401 + side, can the 1 kHz
sine waveform from pin 24 of
IC403 be fed?
OK
Check whether there is theNGCheck IC403 and its
1 kHz sine waveform atperipheral circuit.
pin 20 of IC403.
OK
Check whether there is theNGCheck RT403 and its
1 kHz sine waveform atperipheral circuit.
pin 23 of IC403.
OK
TX output signal from theNG
Check handset RF unit.
handset is detected by the
liner detector, can the 1 kHz
sine waveform be fed?
OK
Check whether there is theNGCheck IC3, Q1 and theirNG
Check base RF unit.
1 kHz sine waveform at pin 9peripheral circuit.
of IC3 on the base unit.
OK
OK
Check whether there is theNGCheck RT2, Q2 and their
1 kHz sine waveform at pin 3peripheral circuits.
of IC1.
OK
Check whether there is theNGCheck IC1 and its
1 kHz sine waveform atperipheral circuit.
pin 6 of IC1.
OK
Check whether there is theNGCheck Q3 and its peripheral
1 kHz sine waveform at thecircuit.
Q3 collector.
OK
Check whether the 1 kHz sineNGCheck T1, RL1 and their
waveform from TEL-lineperipheral circuits.
output is fed.
OK
Check MC401 of handset.
23 |
ACEC
