Service manual

Chapter 14
14-33
T-14-72
T-14-73
(3) Record the protocol on a DAT or MD, and have it analyzed by the local
Canon office and/or Technical Center.
##769 [TX] In ECM transmission, the allowed number of procedure signal
retransmissions was exceeded after transmission of PPS-EOP
Cause: The line condition is poor; as such, although PPR was received 4 times after
transmission of PPS-EOP and then CTC was transmitted, the other party
could not receive it correctly.
Remedy: Increase the transmission level so that the other party may receive CTC
correctly.
Cause: The line condition is poor; as such, although PPR was received 4 times after
transmission of PPS-EOP and then CTC was transmitted, no significant
signal was received correctly thereafter.
Remedy: Ask the operator of the other party to increase the transmission level so that
the signal may be received correctly.
##770 [TX] In ECM transmission, no significant signal can be received after
transmission of EOR-NULL, and the allowed number of procedure
signal re-transmissions was exceeded
Cause: The line condition is poor, and the other party cannot receive EOR-NULL
correctly.
Remedy: (1) Increase the transmission level so that the other party may receive
EORNULL correctly.
(2) Adjust the NL equalizer so that the other party may receive EOR-NULL
correctly.
(3) Add an echo protect tone to the V.29 modem signal for transmission.
Cause: The line condition is poor, and the significant signal cannot be received
correctly.
Remedy: Ask the operator of the other party to increase the transmission level so that
the signal may be received correctly.
##768 [TX] In ECM transmission, the allowed number of procedure signal
retransmissions was exceeded or a T5 time-over (60 sec) condition
occurred after transmission of PPS-EOP