Changing The Parallel Interface Communication Mode - Canon BJ-W3000 Service Manual

5
. Changing the parallel interface
communication mode
With some types of computers which com-
municate in the compatible mode, the timing of
the Busy and Ack signals may need to be
changed as the communication may not be
done correctly.
In most computers, communication can be
carried out normally using the "A-B (Default)"
setting. However, if the data reception indica-
tor on the printer does not light up when data is
transferred, the communication mode should be
switched by following the procedure below.
1) Turn OFF the power switch.
2) While pressing both the ONLINE and
ENTER keys, turn ON the power switch
to display the "Parallel Interface Commu-
nication select Mode."
• Confirm that "Busy-Ack" is displayed on
the message display and release the keys.
Busy-Ack
A-B (Default)
3) Press the left or right arrow key to display
the desired communication mode.
CHAPTER 5. TROUBLESHOOTING
4) Press the ENTER key to confirm the
displayed mode.
• When a "*" mark is displayed after the
name of communication mode, execute
the initial operation and return to the
normal menu.
Busy-Ack
A-B (Default)*
Initializing
REFERENCE:
Relationship between the Busy and Ack
signals in each communication mode :
• A - B (Default) [Ack-in-Busy]
Busy
Ack
• A - B - A [Ack-while-Busy]
Busy
Ack
3264ns
• B - A [Ack-after-Busy]
Busy
Ack
3264ns
• A - B (Fast) [Ack-in-Busy(fast)]
Busy
Ack
Figure 5-203
4080ns
3264ns
3264ns
1200ns
5–15