Canon BJC-7100, Service Manual

Page: 22 / 185

1.5 BJ Cartridge Metal Plate
Do not touch the BJ cartridge's metal plate as it may be very hot. The metal plate
heats up during printing and becomes particularly hot during heavy duty printing.
CAUTION
Danger! High Temperature!
Do not touch.
The printer has the following protective mechanisms to detect overheating:
1. Overheat detection when replacing cartridge
If overheating is detected, a beeper sounds four times and the carriage
does not return to the replacement position. This is to prevent the user
from touching the BJ cartridge's metal plate.
Resume the cartridge replacement after leaving the cartridge to cool for
several minutes.
2. Overheat detection during normal printing
The carriage movement and the paper eject operation are continued
while the printing is stopped. Depending on the outcome of the ink-out
detection after completion of printing a page, a beeper sounds to
indicate the status of the error.
Ink available: BJ cartridge overheat error (beeper sounds 7 times)
Ink out: Ink-out error (beeper sounds 3 or 4 times)
When a BJ cartridge overheat error occurs, leave the cartridge to cool
for several minutes then press the
RESUME button.
These protective mechanisms are based on the temperatures detected by
the sensors in the BJ head.
If the protective mechanism is activated and normal operation cannot be
resumed after cooling the head for several minutes, see
"Part 5: 6.
TROUBLESHOOTING" (page 5-13) .
For details of ink-out detection, see "Part 4: 5.2.3 Ink-out detection" (page 4-48) .
Part 1: Safety and Precautions
BJC-7100
1-6
Metal Plate
Figure 1-7 BJ Cartridge Metal Plate