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 C630 and its
waveform is applied toperipheral circuit.
MC601 + side, can the 1 kHz
sine waveform from Pin 24 of
IC602 be fed?
OK
Check whether there is theNGCheck IC602 and its
1 kHz sine waveform atperipheral circuit.
Pin 23 of IC602.
OK
Check whether there is theNGCheck IC602 and its
1 kHz sine waveform atperipheral circuit.
Pin 20 of IC602.
OK
TX output signal from theNGCheck RT602 or IC601,
handset is detected by theD603 and their peripheral
liner detector, can the 1 kHzcircuits.
sine waveform be fed?
OK
Check whether there is theNGCheck IC4, FT2 and theirNGCheck IC1 and its peripheral
1 kHz sine waveform at Pin 9peripheral circuits.circuit.
of IC4 on the base unit.
OK
Check whether there is theNGCheck RT4, C65, R72 and
1 kHz sine waveform at Pin 3their peripheral circuits.
of IC2.
OK
Check whether there is theNGCheck IC2 and its
1 kHz sine waveform atperipheral circuit.
Pin 18 of IC2.
OK
Check whether there is theNGCheck Q3 and its
1 kHz sine waveform at theperipheral circuit.
Q3 collector.
OK
Check whether the 1 kHz sineNGCheck T1, RL1 and their
waveform from TEL-lineperipheral circuits.
output is fed.
OK
Check MC601 of handset.
? 18 ? |
ACEC
TOSHIBA
