HP 220240 - Manual (Page 25)

Table 1–4: Printer Components: Internal View
Component Function
1. Print Density Dial Has a range of 1–9 to adjust the print density.
Selecting the lower numbers results in heavier or
darker print density. For most printing applications
the dial can be set to 7. See Section 2.11 for additional
information about setting the print density.
2. Cleaning Brush The (green) cleaning brush has two cleaning surfaces:
The brush end, which is used to clean the discharging
pins on the transfer corona assembly; and the fabric
end, which is used to clean the primary corona wire
in the EP-S cartridge. See Chapter 7 for more
information about using the cleaning brush.
3. Fixing Assembly The fixing assembly consists of a heat roller, a
pressure roller, and a roller cleaner. Toner is bonded
to the paper as it passes between the heat and
pressure rollers. The roller cleaner removes excess
toner that may accumulate on the heat roller. The
roller cleaner is replaced each time a new EP-S
cartridge is installed. Each EP-S cartridge comes
with replacement instructions, or you can refer to
Section 7.3 for more information about replacing the
roller cleaner.
4. EP-S Cartridge The EP-S cartridge contains a photo-sensitive drum,
the primary charge corona wire, a drum cleaning
blade, toner, and a toner application roller. When
the 16 TONER LOW message is displayed, it could
mean that the toner is not being distributed evenly.
Rock the cartridge to redistribute the toner (see
Section 7.3). If the 16 TONER LOW message
continues to be displayed after you rock the cartridge,
it means the EP-S cartridge has run out of toner and
you should replace it (see Section 7.3).
5. Ozone Filter Removes ozone generated by the printer. The ozone
filter is replaced every 100,000 pages. The page count
is shown on Test Print A (see Section 2.13). See
Section 7.4 for replacement instructions.
WARNING: Do not operate the printer without the
ozone filter in place. The filter removes ozone that
could be hazardous to your health.
1–8 Operator’s Guide