7. The voice of the caller cannot be heard (incoming call).
Can the base and handset beNGSee 3. The base and handset
connected?cannot be connected.
OK
The 1 kHz, 138mV sineCheck the base TEL-line
NG
waveform is applied to TEL-circuit and REPLAY control
line of the base, can the 1 kHzcircuit.
sine waveform from the Q3
collector be fed?
OK
Check whether there is theNGCheck Q4 and its peripheral
1 kHz sine waveform atcircuit.
pin 24 of IC1.
OK
Check whether there is theNGCheck IC1 and its peripheral
1 kHz sine waveform atcircuit.
pin 20 of IC1.
OK
Check whether there is theNGCheck RT3 and its
1 kHz sine waveform atperipheral circuit.
?MOD? RF unit.
OK
TX output signal from theNG
Check base RF unit.
base is detected by the liner
detector, can the 1 kHz sine
waveform be fed?
OK
Check whether there is theNGCheck IC601, Q601 andNG
Check handset RF unit.
1 kHz sine waveform at pin 9their peripheral circuit.
of IC601 on the handset unit.
OK
OK
Check whether there is theNGCheck RT602, Q602 and
1 kHz sine waveform at pin 3their peripheral circuits.
of IC603.
OK
Check whether there is theNGCheck IC603 and its
1 kHz sine waveform at theperipheral circuit.
pin 18 of IC603.
OK
Check whether there is theNGCheck Q605, Q606 and its
1 kHz sine waveform at pinperipheral circuit.
1, 2 of SP801.
OK
Check SP801 and W801,
W802.
19 |
ACEC
TOSHIBA
