Canon iPF760 User Manual page 537

iPF760 When to Replace the Maintenance Cartridge
Check the remaining Maintenance Cartridge capacity before this maintenance and replace the Maintenance Car-
tridge if necessary.
If a message for the Maintenance Cartridge replacement is shown on the Display Screen
When the Maintenance Cartridge is full, the Message Lamp flashes and a message to replace the Maintenance
Cartridge is shown on the Display Screen. Printing is disabled, and you cannot replace the Printhead or transfer the
printer. Replace the Maintenance Cartridge with a new one.
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User's Guide