Structure Of Purge Unit - Canon 1692B002 Service Manual

Chapter 2
Cleaning mode
Cleaning 1
Cleaning 2
Cleaning 3
Cleaning 4
Cleaning 5
Cleaning 6
Cleaning 7
Cleaning 10
Cleaning 15
Cleaning 16
Cleaning 17
The cleaning operation is executed at the following timing.
Printer status
Standby
Power on
Powered off
Before the start
of a print operation
Printing
At the end of a print
operation
On execution of the
menu action [Head
Cleaning]
On execution of the
menu action [Replace
P.head]
On execution of Move
Printer from the menu
c) Ink supply function
The suction pumps in the purge unit are activated, together with ink supply valves, during initial filling and ink level adjustment to supply inks from the ink tanks
to the printhead.

2.3.2.5.2 Structure of Purge Unit

a) Caps
The caps cap the nozzle assembly in the left printhead during capping and cleaning. The part of the caps that comes into contact with the face plate of the nozzle
assembly is made of rubber. Two caps are in position to meet each of the printheads mounted on the carriage (six trains of nozzles).
2-12
Name Cleaning operation
Normal cleaning Removes fixed inks caused by dried nozzles and viscous
ink matters adhering to their faces, paperdust and so on.
Cleaning on ink level adjustment Performs normal cleaning after suction for ink level adjustment in the head.
Cleaning on initial filling Performs normal cleaning after filling empty tubes with inks (at initial installation).
Ink drainage on head Drains the head of head replacement (inks left in the head only).
replacement
Ink drainage on secondary Drains the head and tubes of inks to prepare for secondary shipping.
shipping
Normal (high) cleaning Adjusts the rate of ink filling in the head and performs higher suction to clear clogged nozzles than does
normal cleaning.
Aging Performs maintenance jet following head replacement.
Ink filling on secondary shipping Perform normal cleaning after filling empty tubes with inks (at installation after secondary shipping).
Dot count suction Performs a suction operation to remove fixed inks caused by dried nozzles and viscous ink matters
adhering to their faces when a predetermined dot count is reached.
A gitation on settling Agitates the ink in an tank to keep it from settling (by opening and closing the ink supply valve),
Cleaning, low Performs lower suction to clear clogged nozzles than does normal cleaning.
On each lapse of 168 minutes in a capped state
168 hours or more elapsed, capped
720 hours or more elapsed, capped
960 hours or more elapsed, capped
Initial installation and 168 hours elapsed, capped, since the last session of
agitation on settling
(Cleaning 16)
Initial installation
Powered on less than 72 hours after the abnormal termination of a print
operation (uncapped)
Powered on 72 or more hours after the abnormal termination of aprint
operation (uncapped)
Powered on at initial installation and 168 hours elapsed, capped, since the
last session of agitation and settlement
(Cleaning 16)
Powered on 720 hours or more after the successful completion of a print
operation (capped)
Powered off less than 960 hours after the successful completion of a print
operation (capped)
Powered off, uncapped
Before the start of a print operation less than 168 hours elapsed, capped
Before the start of a print operation 168 hours or more elapsed, capped
Before the start of a print operation in the wake of an error occurrence
Before the start of a remaining roll media volume pattern
Between scans while printing
After the end of a print operation past a predetermined dot count
Manual cleaning
(Head cleaning A)
Manual cleaning
(Head cleaning B)
On execution of Replace P.head from the menu
After head replacement
After execution of Move Printer from the menu
After Power-on at secondary installation
T-2-7
T-2-8
Cleaning operation
Maintenance jet
Cleaning 1
(Normal cleaning)
Cleaning 6
(Normal (high) cleaning)
Cleaning 2
(Ink level adjusting and cleaning)
Cleaning 16
(Agitation on settling)
Cleaning 3
(Cleaning on initial filling)
Cleaning 1
(Normal cleaning)
Cleaning 6
(Normal (high) cleaning)
Cleaning 16
(Agitation on sattling)
Cleaning 6
(Cleaning on ink level adjustment)
Cleaning 2
(Cleaning on ink level adjustment)
Wiping + Maintenance jet + Idle suction + Capping
Maintenance jet
Cleaning 1
(Normal cleaning)
Cleaning 1
(Normal cleaning)
Temperature regulator on > Uncap > Stop and maintenance jet
> Temperature regulator off > Cap
Maintenance jet + Wiping
Cleaning 15 (dot count suction) or Cleaning 6 (normal (high)
cleaning), depending on the count
Cleaning 1
(Normal cleaning)
Cleaning 6
(Normal (high) cleaning)
Cleaning 4 (Ink drainage on head replacement)
Cleaning 2 (Cleaning on ink level adjustment)
Cleaning 5 (Ink drainage on secondary Moving)
Cleaning 10 (Ink filling after secondary shipment)
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