- Printers
- Inkjet printer
1203
Canon 1203 on an inkjet printer: cover opened while printing
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
The cover was opened while the printer was printing. If paper remains inside, pull it out slowly with both hands, close the cover and press OK. The printer ejects one blank sheet and resumes from the next page.
Safety first
Stop and check this first
- Do not open or close the cover while the printer is printing: Canon says this can damage the printer.
Safe checks you can perform
- Paper inside the printer
- Close the cover and press OK
- Test without touching the cover
Leave these tasks to a qualified professional
- Do not attempt this professional task: Cover detection check
- Do not attempt this professional task: Check for damage after opening
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Cover detection check
What they doIf 1203 appears with the cover closed, the Canon service technician checks that the printer detects the cover correctly with an open and close test.
They must show youthe open and close test and a full print with no message.
In writingthe cause found and the reference of any part replaced.
Check for damage after opening
What they doIf the cover was opened several times during printing, Canon service checks the printer prints normally, since Canon warns that opening and closing it during printing can damage the printer.
They must show youa test page printed without an error.
In writingthe result of the check and whether any repair was needed.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Paper inside the printer
- Who:
- you, no tools.
- How:
- with the cover open, look for a half printed sheet. If there is one, pull it out slowly with both hands without jerking it.
- Result that matters:
- no paper or scraps left inside.
- If it comes out whole:
- go on to closing the cover and pressing OK.
- If it tears and scraps remain:
- remove them before closing.
- Evidence to keep:
- photo of the removed paper if it tore.
Evidence: Canon PIXMA TS3300 support code 1203
Close the cover and press OK
- Who:
- you.
- How:
- close the cover fully and press OK. The printer should eject one blank sheet and resume from the next page.
- Result that matters:
- the error clears and the job continues.
- If it continues:
- opening the cover was the cause; reprint the missing page.
- If 1203 does not clear with the cover closed:
- turn the printer off and on and try a short job.
- Evidence to keep:
- note of which page was not printed.
Evidence: Canon PIXMA TS3300 support code 1203
Test without touching the cover
- Who:
- you.
- How:
- send a one or two page job and do not open the cover while it prints.
- Result that matters:
- the job finishes without 1203.
- If it finishes normally:
- nothing else is needed.
- If 1203 appears with nothing opened:
- note when it happens and contact Canon service.
- Evidence to keep:
- date, time and a photo of the message if it shows with the cover closed.
Evidence: Canon PIXMA TS3300 support code 1203
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Printers
- Brand
- Canon
- Product type
- Inkjet printer
Known code variants
- Canon 1203
- Canon cover open 1203
- Canon cubierta abierta 1203
- Canon support code 1203
- código 1203 Canon
- PIXMA 1203
What it means
Canon defines PIXMA TS3300 support code 1203 as the cover being opened during printing. The printer senses the opening and stops the job to protect the mechanism. When you press OK it ejects one blank sheet and carries on with the next page, but it does not reprint the page that was printing when the cover was opened. The code describes an action, not a fault: it only needs a check if it appears when nothing was opened. Confirm the meaning in your own series list.
Warnings and stop conditions
- Lowsource verified
Do not open or close the cover while the printer is printing: Canon says this can damage the printer.
Evidence: Canon PIXMA TS3300 support code 1203
Symptoms and causes
Probable causes · in order
- Cover opened during the jobCommon
This is Canon's definition. It fits if someone opened the cover, for example to look at a jam, while the printer was still printing.
Evidence: Canon PIXMA TS3300 support code 1203
- Paper left inside after openingPossible
Canon asks you to pull out any remaining paper slowly before closing. If it stays, the job cannot continue normally.
Evidence: Canon PIXMA TS3300 support code 1203
- Message with the cover never openedLess common
If the code shows with the cover closed and untouched, it no longer fits the definition and belongs with service.
Evidence: Canon PIXMA TS3300 support code 1203
Virtual technician
Does 1203 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Canon PIXMA TS3300 support code 1203
Canon PIXMA Manuals · 2019 · official_doc
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