Table of Contents
Advertisement
7. The voice of the caller cannot be heard (incoming call).
Can the base and handset be
connected?
OK
The 1 kHz, 86.9mV sine
waveform is applied to TEL-
line of the base, can the 1 kHz
sine waveform from the Q2
collector be fed?
OK
Check whether there is the
1 kHz sine wavefor m at
pin 12 of IC2.
OK
TX output signal from the
base is detected by the liner
detector, can the app. 30kHz
pulse waveform be fed?
OK
Check whether there is the
1 kHz sine waveform at pin 22
of IC602 on the handset unit.
OK
Check whether there is the
1 kHz sine waveform at pin
17 of IC602.
OK
Check whether there is the
1 k H z s i n e w a v e f o r m
between 1 and 2 of SP801.
OK
Check SP801.
NG
See 3. The base and handset
cannot be connected.
Check the base TEL-line
NG
circuit and REPLAY control
circuit.
NG
Check Q3 and its peripheral
circuit.
NG
Check base RF unit.
NG
Check handset RF unit.
NG
Check C611, R631, R629,
R639, R641, C670, C671.
NG
Check C612, C614, W801,
W802.
19
Advertisement
Table of Contents
