Definition: Canon Pixma Error 1200 is a common status code which indicates that the printer’s scanning unit (the main cover) or the ink tank cover is detected as being open. This is a safety feature designed to prevent the print head from moving while your fingers might be inside, or to ensure that dust and light don’t interfere with the delicate printing process.
🛠️ Pro Tip: Verify Technical Specs
Before unscrewing any panel, ensure you have the correct service manual for safety.
Hey there, DIY friend! I know exactly how you feel. You’ve got an important document to print, you hit “Go,” and instead of that satisfying hum of productivity, your Canon Pixma starts blinking at you like a confused robot. You might see a frustrating popup on your computer screen saying “Cover is open,” or you might hear the printer attempt to move its internal parts before giving up with a series of amber flashes. It feels like the printer is being stubborn, especially when the lid looks perfectly shut to your eyes!
Don’t let that blinking light get your heart rate up. This is one of the most common “hiccups” in the Canon world, and most of the time, it doesn’t even require a single spare part. We are going to walk through this together, step-by-step, and get your printer back to work. You’ve got this!
Quick Repair Specs
- Difficulty: Beginner (Very Easy)
- Estimated Time: 5–15 Minutes
- Tools Needed:
- Bright Flashlight (to see tiny sensors)
- Can of Compressed Air or a Soft Microfiber Cloth
- Small Flathead Screwdriver (optional, for nudging stuck tabs)
- Estimated Cost: $0 (Free DIY Fix)
Symptoms
Before we dive into the fix, let’s make sure we are looking at the right problem. If your Canon Pixma is suffering from Error 1200, you will likely notice these specific signs:
- The Amber Alert: The “Alarm” lamp (usually a triangle with a lightning bolt) flashes orange exactly two times in a repeating cycle.
- The PC Popup: A window appears on your computer monitor explicitly stating “Cover is open” or “Error Code 1200” with a diagram of the printer.
- The Silent Treatment: The printer may make a brief mechanical noise as if it’s about to start, but the internal carriage (the part that holds the ink) immediately slides back to its home position and stops.
- Physical Misalignment: Upon closer inspection, you might notice one corner of the scanner lid sitting just a millimeter or two higher than the rest of the chassis.
Detailed Diagnosis: Root Causes
Detailed Diagnosis: Root Causes
Why does your printer think it’s open when it looks closed? Here are the primary culprits behind the mystery:
- The “Ghost” Obstruction: Over time, tiny fragments of torn paper or even a stray paperclip can lodge themselves in the hinge or near the sensor path. Even a piece of paper as thin as a hair can prevent the lid from seating deep enough to trigger the “closed” signal.
- Sensor Fatigue or Jamming: Canon printers use a tiny plastic “plunger” or “lever” that gets pushed down when the lid closes. Sometimes, this little plastic part gets stuck in the “up” position due to a buildup of ink mist or dust, acting like a sticky elevator button that won’t go down.
- Mechanical Stress/Warping: If heavy books are often scanned or if the lid was slammed too hard, the plastic hinges can slightly deform. This wear and tear means the “tooth” on the lid no longer aligns perfectly with the “throat” of the sensor.
- Incomplete Ink Carriage Seating: Sometimes, the error isn’t the lid at all, but the ink cartridge locking lever. If a cartridge isn’t snapped in 100%, it can physically block the lid from closing that final fraction of an inch, even if it looks shut from the outside.
How to Fix Canon Error 1200 (Step-by-Step)
How to Fix Canon Error 1200 (Step-by-Step)
Follow these steps in order. We’ll start with the easiest and move toward the more “hands-on” solutions.
Open the scanning unit (the big top lid) all the way. Look closely at the edges for any tiny scraps of paper. Check the hinges at the back to ensure nothing has fallen into the gaps. Close the lid and, using both hands, give a firm (but gentle!) press on both the left and right sides of the lid. Sometimes the sensor is only on one side, and if the lid is slightly skewed, it won’t trigger.
Many Pixma models have an internal cover that sits directly over the ink cartridges. Open the main lid and look at the cartridges. Ensure each ink tank is clicked down firmly. If your model has a gray or black “inner” latch, open it and snap it back down until you hear a distinct “click.” If this inner latch is even slightly raised, it acts as a physical stopper for the outer lid.
Safety Warning: Never touch the clear, thin plastic timing film (encoder film) behind the carriage. Getting oil from your fingers or ink on this strip can cause even worse printing errors!
Grab your flashlight. With the lid open, look for a small plastic “tab” or “tooth” protruding from the underside of the lid. Now, look for the corresponding hole on the printer body where that tab goes. Use your can of compressed air to blow a few short bursts into that hole. Dust or a tiny spider web inside that hole can block the optical sensor from seeing the tab. If the sensor is a physical lever, gently nudge it with a small screwdriver to make sure it moves freely and isn’t stuck.
Sometimes the printer’s brain just gets “stuck” in an error loop. With the printer still ON, pull the power cord directly out of the back of the machine. Now, walk away for a full 60 seconds. This allows the capacitors in the power supply to fully discharge. Plug it back in and wait for it to initialize. This force-clears the temporary memory and often clears the 1200 code if it was a software glitch.
If you’ve ever scanned a thick textbook, your hinges might be in the “extended” position. Most Pixma hinges are designed to lift up to accommodate thick items. Push down firmly on the back hinges of the lid to ensure they have retracted back into their base positions. If the back of the lid is sitting too high, the front tab will never reach the sensor.
How to Prevent Error 1200
Now that we’ve got you back up and running, let’s make sure this doesn’t happen again! Here are my top mentor tips for printer longevity:
- The “Gentle Landing” Rule: Avoid letting the scanner lid drop or slam. The plastic sensors in Canon printers are precise but delicate. Lower the lid gently until it makes contact, then give it a tiny pat to ensure it’s seated.
- Monthly Dusting: Once a month, take a soft cloth and wipe down the “landing zones” where the lid meets the printer body. This prevents the buildup of dust that can eventually fall into the sensor holes.
- Clear the “Workspace”: Do not store paper, staplers, or folders on top of your printer. The weight can cause the plastic casing to bow slightly over time, which eventually leads to sensor misalignment and that pesky 1200 error.
FAQ
Frequently Asked Questions (FAQ)
Q: I’ve cleaned everything and it still says the cover is open. Is my printer broken?
A: Not necessarily! If you’ve done all the steps and the error persists, the physical sensor (a tiny micro-switch inside) may have failed or become disconnected. Before giving up, try the “tape trick”: find the sensor hole and carefully use a small piece of folded cardboard to hold the switch down, then tape it in place. If the error vanishes, you know the lid just isn’t reaching the switch anymore.
Q: Does Error 1200 mean I need new ink?
A: No, Error 1200 is strictly a mechanical/sensor error related to the door. However, if you recently changed your ink, it’s very likely that one of the tanks isn’t seated quite right, which is physically preventing the door from closing properly.
Q: Can a paper jam cause Error 1200?
A: Absolutely. If a piece of paper is jammed deep inside the rear tray or under the carriage, it can push upward against the internal components, “lifting” the lid just enough to break the sensor connection. Always check the paper path if the lid looks closed but the error remains.