8. The voice of the caller cannot be recorded.
Check hearing the OGMNGCheck around IC401, IC403,
when push OGM key.IC409, IC410 and IC751.
OK
When 1 kHz -20dBm sineNGCan the sine wave be seenNGCheck TEL network primary
waveform is applied to TEL-at pin 17 of IC2?circuit.
line of the base, can the sine
OK
wave be seen at TP433?
OK
Check around IC401.
Can the sine wave be seenNG
Check around IC402.
at pin 6 of IC401?
OK
Check around IC401, IC403,
and IC409.
9. Outgoing message cannot be transmitted to other party.
Can the voice wave be seenNGCheck around IC401, IC403,
at pin 1 of IC401 when OGMIC409, IC410 and IC751.
key is pressed?
OK
Can the voice wave be seenNG
Check around IC401.
at TP431?
OK
Check TEL network primary
circuit.
25 |