Canon iR1200 Series Service Manual page 395

##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
Remedy: 1. Increase the transmission level so that the other party may
receive EOR-NULL 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.
##772 [TX] In ECM transmission, DCN was received after
transmission of EOR-NULL
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 EOR-NULL 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 Stop key was pressed during a communication.
Remedy: Transmit once again.
##773 [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 EOR-
NULL
Cause: The page buffer of the other party is full or is engaged; as such,
although RNR was received after transmission of EOR-NULL and
then RR was transmitted, no significant signal was received
correctly thereafter.
T-14-81
T-14-82
Chapter 14
14-39