Cleaning Modes And Ink Purge Amounts - Canon S520 Service Manual

S900 / S820 / S750 / S520

2. CLEANING MODES AND INK PURGE AMOUNTS

Automatic print head cleaning is performed as effectively and efficiently as possible
according to given conditions in order to eliminate and prevent printing imperfections
due to bubbles, foreign matter, clogging etc.
Except for the situations below, cleaning is timed to take place immediately before
printing.
* dot count cleaning: after paper has been ejected
* manual cleaning/Deep Cleaning: user operation
* delivery of the printer: when the access cover is closed (S750/S520)
Conditions
120 hours timed
cleaning
Dot count cleaning
After hard power ON
(when the time has not standalone printer
et been set)
480 hours timed
cleaning
At ink tank replacement When the ink sensor status changes
When manual cleaning Conducted either from the operation
is performed
When the heads are
uncapped at soft
power ON
At head replacement
When Deep Cleaning
is conducted
On delivery of the
printer
✽1 The purge amount is a total of the 6 colors.
✽2 When several conditions are met, the priority order of cleaning modes is A<B0<B1<C<D.
✽3 The EEPROM information printout's figures for no. of times cleaning has been
conducted indicate details on cleaning modes.
Table 3-1 CLEANING MODES (S900/S820)
Details
When between 120 and 480 hours have
passed since the last cleaning operation
When a specified dot count has been
exceeded since the previous cleaning
When a test print is performed from the
When more than 480 hours have passed
since the previous cleaning
from NO to YES
panel or the driver
When proper capping did not take place
at the last power OFF
When a print head is removed and
installed
Driver operation
The first cleaning which takes place after
the printer has left the factory
3-3
Part 3: Technical Reference
Cleaning
Purge amount in gms
(S900/S820)* mode*
1
1.1/0.64 A
1.55/0.84 B0
B1
2.8/1/45 C
2.8/1.65 D
*
2 3