Can you keep using it?
Can you keep using it?
Contact customer support if any of these apply
- !1871 remains after the cassette is fully inserted.
- !The cassette rails or seating points no longer line up correctly.
What to check first
Step-by-step checks
- 1
Safe first step
Push the cassette fully into the printer until it sits normally.
Start with the official recovery step before moving on to parts or deeper servicing.
- 2
Consumable check
Check that the paper stack is aligned and not stopping the cassette from closing.
- 3
Safe first step
Retry after the cassette is seated squarely.
Background
What this message usually means
Canon uses support code 1871 when the TR4500 series detects that the paper cassette is not inserted correctly. This is typically a paper-source seating problem rather than a deep hardware issue.
Before the message
What users usually notice first
Messages like this often appear after the printer fails one of its normal startup, supply, or paper-path checks and cannot return to ready state cleanly.
Diagnosis
Likely causes
The cassette was left partially open or not pushed fully into position.
Paper loading shifted the cassette so it did not seat correctly.
The printer cannot confirm the paper source is in its normal position.
Service
When service or replacement is more likely
- -This is a paper-source seating issue first, not a mechanics failure.
Avoid wrong turns
Common misreads of this message
- -Treating the message like a confirmed failed part instead of a support clue about which system has stopped the printer.
- -Assuming no physical path issue exists just because no full sheet is visible at first glance.
See also
Related codes in this family
Explore more
More Canon printer families
Read this next
Helpful guides for this problem
Guide
When a printer says paper jam but there isn't one
What a false paper-jam warning usually points to, from hidden scraps and tray issues to faults that are no longer simple jams.
Guide
How to identify your Canon printer family before using an error code page
How to work out the right Canon family first so the code page you open is actually talking about your printer.
Guide
How to tell if a printer fault is a cartridge issue or a service issue
How to separate ordinary cartridge or toner trouble from the kind of printer fault that usually points to real service.
Boundary
When to stop troubleshooting and move to support
Use the message once to classify the problem, then move to support if the printer still cannot return to ready after the first safe checks.
Keep browsing
Where to go next
Source notes
Canon's official 1871 page says the cassette is not inserted correctly and directs users to seat it fully before continuing.
Built around Canon TR4500-series official support-code guidance. Exact wording can vary a little by regional model naming, but the support-code meaning stays close across the family.
Printer error codes can vary a little by firmware, region, and exact model variant. Use this guide as a family-level starting point and stop if the next step would require disassembly or service-mode changes.
Known family variants: TR4520, TR4522, TR4527, TR4530, TR4540, TR4550, TR4551, TR4560, TR4570, TR4570S, TR4580, TR4590, TR4595
Last reviewed: 2026-04-12
Reference: Open reference