Waste Ink Absorber Unit - Canon BJ-W3000 Service Manual

CHAPTER 2. BASIC OPERATION
[6] Suction by timer
If 72 hours elapse with no suction
operations, head cleaning will be car-
ried out in the next standby mode.
• One suction operation occurs for the
corresponding head.
[7] Suction by dot count
The number of dots of ink discharged
since the last suction operation is
counted and stored in the RAM on the
engine controller. When this dot count
exceeds the specified value, head clean-
ing operations are conducted after the
completion of printing.
The dot count is cleared to 0 after
each suction operation, and when the BJ
print head is replaced.
• One suction operation occurs for the
corresponding head.
2–56
D. Waste Ink Absorber Unit

1. Waste ink absorber unit

Waste ink is removed from the head
nozzles by the suction operation, sent to the
waste ink absorber unit through the waste ink
carriage tube by vacuum, and absorbed by
the waste ink absorber unit.
The waste ink level is measured by count-
ing dots. When the specified count is ex-
ceeded, a warning message indicating a full
waste ink absorber unit is shown on the
message display, and the printer is stopped
after completion of the current printing
process.
CAUTION
• After the waste ink absorber unit is
replaced, the dot count for the waste
ink absorber unit should always be
cleared in the service mode.
• When replacing the engine controller,
be sure to follow the procedures on
page 5-12, to allow the count stored in
the EEPROM to be renewed.