Canon iR1200 Series Service Manual page 378

CHAPTER 7 TROUBLESHOOTING
##753 [TX] In ECM transmission, the allowed number of procedure signal re-
transmissions was exceeded or a T5 time-over (60 sec) condition
occurred after transmission of PPS-NULL
Cause: The page buffer of the other party is full or is engaged; as such, although RNR
was received after transmission of PPS-NULL and then RR was transmitted, no
significant signal was received correctly thereafter.
Remedy: 1. Start G3 mode, and transmit once again (Prohibit the ECM mode).
2. Decrease the transmission start speed.
3. Record the protocol on a DAT or MD, and have it analyzed by the local Canon
##754 [TX] In ECM transmission, the allowed number of procedure signal re-
transmissions was exceeded after transmission of PPS-NULL
Cause: The line condition is poor; as such, although PPR was received 4 times after trans-
mission of PPS-NULL 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 trans-
mission of PPS-NULL 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.
##755 [TX] In ECM transmission, no significant signal can be received after
transmission of PPS-MPS, and the allowed number of procedure
signal re-transmissions was exceeded
Cause: The line condition is poor, and the other party cannot receive PPS-MPS correctly.
Remedy: 1. Increase the transmission level so that the other party may receive PPS-MPS
2. Adjust the NL equalizer so that the other party may receive PPS-MPS 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.
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COPYRIGHT © 2002 CANON INC.
office and/or Technical Center.
correctly.
2000 2000 2000 2000 CANON iR1200/iR1300 Series REV. 0 AUG. 2002