Canon PC1000s Service Manual page 357

CHAPTER 7 TROUBLESHOOTING
##760 [TX] In ECM transmission, no significant signal can be received after
transmission of PPS-EOM, and the allowed number of procedure
sianal re-transmissions was exceeded
Cause: The line condition is poor, and the other party cannot receive PPS-EOM cor-
rectly.
Remedy: 1. Increase the transmission level so that the other party may receive PPS-
EOM correctly.
2. Adjust the NL equalizer so that the other party may receive PPS-EOM cor-
rectly.
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 cor-
rectly.
Remedy: Ask the operator of the other party to increase the transmission level so that
the signal may be received correctly.
##762 [TX] In ECM transmission, DCN was received after transmission of
PPS-EOM
Cause: The line condition 'is poor, and the other party cannot receive PPS-EOM cor-
rectly.
Remedy:
1.
Increase the transmission level so that the other party may receive PPS-
EOM correctly.
2.
Adjust the NL equalizer so that the other party may receive PPS-EOM cor-
rectly.
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.
##763
VX]
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-EOM
Cause: The page buffer of the other party is full or is engaged; as such, although
RNR was received after transmission of PPS-EOM and then RR was tmsmit-
ted, 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 office andlor Technical Center.
COPYRlGHTQ2002CANON INC.
CANON PC10OLMmageCLAS.S 06009REV. 1 AVG.2W
7-75