Service manual

Chapter 14
14-21
T-14-38
T-14-39
T-14-40
##238 [RX] The unit used to control recording malfunctioned
Cause: The operation of the IC used to control recording did not end normally.
Remedy: Replace the DC controller PCB.
##261 [TX/RX] System error occurred between the modem and system control board
Cause: An internal unit is faulty (when RS is set to '1', CS fails to go '1').
Remedy: Replace the image processor PCB. (faulty modem)
##280 [TX] The number of re-transmissions of the procedure signal has been
exceeded
Cause: The line condition is poor, and the appropriate signal from the other party
cannot be received correctly after transmission of TCF.
Remedy: (1) Increase the transmission level so that the other party may receive TCF
correctly.
(2) Ask the other party to increase the transmission level so that the
appropriate signal may be received correctly.
Cause: The other party malfunctioned because of an echo.
Remedy: (1) Using a manual call, press the Start button after hearing the 1st DIS from
the other party.
(2) To prevent response to the 1st DIS from the other party, put a relatively
long pause to the telephone number when registering an auto-dialing number.
(3) Ask the operator of the other party to provide echo remedy 1.
(4) Ask the operator of the other party to decrease the transmission level so
Cause: that the other party will not receive an echo.
Remedy: The telephone line has a faulty connection.
Cause: Check to see that the telephone line is connected correctly.
Remedy: During a communication, the telephone line was disconnected.
Avoid disconnecting the telephone line while a communication is under way.