Step 11: Photosensitive drum cleaning
See Photosensitive drum cleaning for a complete discussion of photosensitive drum cleaning.
Calibration and cleaning
The printer automatically calibrates and cleans itself at various times to maintain the highest
level of print quality. You can also force the printer to calibrate by choosing CALIBRATE
NOW from the Print Quality menu. See
Calibrate now.
While the printer is calibrating or cleaning, it will pause printing. For most calibrations and
cleanings, the printer will not interrupt a print job, but will wait for the job to complete before
calibrating or cleaning.
Table 5-4. Cleaning timing and duration shows when the printer
cleans and the duration of the cleaning. The sections that follow discuss calibration and
cleaning in more detail.
Note
The times listed in the tables below are preliminary and are subject to change.
Note
Certain error conditions can cause some calibrations to repeat which will increase the
duration listed in the table below.
Table 5-3. Calibration timing and duration
Calibration occurrence Duration Type of calibration
When you turn the printer on. 75 seconds for calibration, but
because of other initialization
activities, the printer takes a
total of 2 minutes to be ready
for printing
DMAX, DHALF
Warm (1:10) (HP Color
LaserJet 5550 models)
Cold (2:10) (HP Color LaserJet
5550 models)
When you install one or more
print cartridges that have not
previously been installed in the
printer.
150 seconds (2 minutes, 30
seconds)
DMAX, DHALF, color plane
registration (CPR)
CPR, DMAX, DHALF (2:25)
(HP Color LaserJet 5550
models)
After 50 pages have printed
since installing a print cartridge.
The printer will finish printing
the current job before calibrating.
75 seconds
60 seconds (HP Color
LaserJet 5550 models)
DMAX, DHALF
After 1000 pages have printed
since the last calibration. The
printer will finish printing the
current job before calibrating.
75 seconds
60 seconds (HP Color
LaserJet 5550 models)
DMAX, DHALF
After 8 hours since the last
calibration, but not while the
printer is in PowerSave mode.
Typically, this calibration occurs
on the first job or control panel
interaction after an overnight
idle period.
75 seconds
60 seonds to ready, 70
seconds to belt stop (HP Color
LaserJet 5550 models)
DMAX, DHALF
ENWW Image formation system 161
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