Canon shows numbered support codes for maintenance and error states, and each code has its own article. Support code 1727 means the maintenance cartridge is almost full on the GX6020 and GX7020, Canon says the printer will not be able to print with a full maintenance cartridge, and to tap OK to cancel the error and prepare a new maintenance cartridge; replacing it is a documented step for the GX7020, as is performing an ink flush from the operation panel. On the MegaTank G7020 Canon community answers explain there is no user replaceable maintenance cartridge, since the ink absorber is not user replaceable, and when it is completely full the printer must be serviced or replaced.
Code 1430 means an ink cartridge cannot be recognized; other codes cover ink levels, jams, and print head problems.
The checks in more detail
Read the code on the display or in the driver's status monitor, search Canon's support code list for your model, and follow its What to Do. Common first steps are to turn the printer off, wait, unplug for a minute, reseat cartridges and remove packing material. On imageCLASS models Canon publishes instructions for clearing error messages such as Prepare toner cartridge. If a code says the printer requires servicing, further steps will not help. Note the code and model before contacting Canon. Photograph the message and note the time. The exact code shortens a support call, and a record of what you tried avoids repeating steps.
Keep the printer's manual or a link to it, since the meaning of the display and lamps differs between lines and the manual names each one.
Differential
Likely causes of “Canon printers shows a maintenance box, drum, fuser, waste toner or service message”, and how to tell them apart
- 1
A full maintenance cartridge
What separates it The printer shows code 1727 because the maintenance cartridge is full
How to confirm Replace the maintenance cartridge with a new one
- 2
A full absorber
What separates it There is no replaceable cartridge because the absorber is full
How to confirm Have the printer serviced, or replace it, since the absorber cannot be replaced by you
- 3
A cartridge not recognized
What separates it The printer shows code 1430 because a cartridge is not recognized
How to confirm Reseat or replace the cartridge, and check that the error clears
- 4
A toner error
What separates it The printer says Prepare toner cartridge because of a toner error
How to confirm Follow the toner steps for your model, and replace the toner if needed
- 5
A hardware fault
What separates it The printer says it requires servicing because of a hardware fault
How to confirm Contact Canon, since a hardware fault needs a repair
Before you touch a setting
Record this first — changing settings destroys the evidence
- The model of the printer that you have
- What you have already tried to clear the message
- The ink or toner levels that the printer shows
Try in this order
0 of 7 completedRead the code
ReversibleRead the code on the display, or in the driver on the computer, and then test again to see whether it helped.
Find its article
ReversibleFind its article, by searching Canon's knowledge base for the code, and then test again to see whether it helped.
Follow What to Do
ReversibleFollow What to Do in the article, step by step, without skipping any, and then test again to see whether it helped.
Power cycle
ReversiblePower cycle the printer, by unplugging it for a minute, and then plug it in.
Replace consumables
ReversibleReplace consumables, such as the maintenance cartridge or the toner, if the code names them.
Do an ink flush if listed
ReversibleDo an ink flush if it is listed for your code, from the printer's panel.
Contact Canon
ReversibleContact Canon if servicing is needed, and give them the code and the model, and then test again to see whether it helped.
Model-specific
What is true of this model and not of its siblings
- GX models
- MAXIFY GX models use a replaceable maintenance cartridge.
- G models
- MegaTank G models use a built-in absorber.
- Other models this page answers
- These steps also fit models TS9521C, PIXMA TS6420a, G7020, G6020, GX7021, GX4020, Color imageCLASS LBP632Cdw, Color imageCLASS MF656Cdw.
Stop boundary
When this stops being a self-service repair
- !If the code says the printer requires servicing, contact Canon
- !If a G7020 absorber is full, arrange service
- !If a maintenance cartridge is full, replace it
Evidence ledger
Sources behind this answer
Maintenance cartridge.
Canon community answer that the G7020 has no user-replaceable maintenance cartridge.
Remove, reinstall or replace.
Clearing error messages.
Replacing the maintenance cartridge.
The company and its products.
Exact questions
Common questions
What is support code 1727?+
The maintenance cartridge is almost full.
Can I print with a full maintenance cartridge?+
No, you cannot print with a full maintenance cartridge, on the models that use one.
Does the G7020 have one?+
It has a non-replaceable ink absorber.
What is code 1430?+
An ink cartridge cannot be recognized.
What does requires servicing mean?+
Requires servicing means that a repair is needed, so contact Canon.
Can I cancel the error?+
You can cancel the error on some codes, by tapping OK, but the fault remains.
What is an ink flush?+
A panel routine listed for GX and G models.
Where are codes listed?+
The codes are listed in Canon's knowledge base, with a fix for each one.
Do lasers have codes?+
Yes, laser printers have codes as well, for toner and other faults.