Canon PIXMA MX870 Service Manual page 21

has occurred.
##784 TX After transmitting EOR-EOM in ECM transmission, ERR has
been received.
##785 TX After transmitting EOR-EOP in ECM transmission, no
significant signal has been received, and re-transmission of the
procedure signal has been attempted the number of specified
times but failed.
##787 TX After transmitting EOR-EOP in ECM transmission, DCN has
been received.
##788 TX After transmitting EOR-EOP in ECM transmission, re-
transmission of the procedure signal has been attempted the
number of specified times but failed, or T5 time-over (60 sec.)
has occurred.
##789 TX After transmitting EOR-EOP in ECM transmission, ERR has
been received.
##790 RX After receiving EOR-EOP in ECM reception, ERR has been
transmitted.
##791 TX / RX During the ECM mode procedure, a signal other than a
significant one has been received.
##792 RX In ECM reception, PPS-NULL between partial pages has not
been detected.
##793 RX During high-speed signal reception in ECM, no effective frame
has been detected, and a time-over has occurred.
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- Try a higher transmission level.
- Try a higher transmission level.
- Increase the transmission level of
the receiving machine.
- Try a higher transmission level.
- Increase the period of time of the
T5 time-over.
- Try a higher transmission level.
- Increase the transmission level of
the sending machine.
- Increase the transmission level of
the sending machine.
- Try a higher transmission level.
- Increase the transmission level of
the sending machine.