Canon Canon PIXMA TS3520 Wireless All-in-One Inkjet Printer 1003 Error Fix: Support Code 1003 — Paper Size Mismatch

Error code 1003 on the Canon Canon PIXMA TS3520 Wireless All-in-One Inkjet Printer means: Support Code 1003 — Paper Size Mismatch. The paper size selected in the print settings does not match the paper actually loaded in the tray. The printer detected a different paper width or detected no paper at the expected position. Verify the paper size loaded in the tray matches the size selected in the print driver (File > Print > Properties > Paper Size). If printing from a mobile device, check the paper size setting in the Canon PRINT app. Also verify the paper guides in the tray are adjusted to match the loaded paper size — the guides have markings for Letter, Legal, A4, etc. If you changed paper sizes, update both the physical guides AND the software setting.

The most successful fix is "Calibrate Paper Size Sensor and Replace Tray if Faulty" (medium difficulty, ~40 minutes). Estimated DIY cost: $10-$25. HomeMD has 2 community-ranked fixes for this error.

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Calibrate Paper Size Sensor and Replace Tray if Faulty") is rated medium difficulty and takes about 40 minutes. Tools needed: Microfiber cloth, Small Phillips screwdriver.

DIY cost: $10-$25. Professional repair typically costs $120-$160. Many homeowners save money by trying the top-ranked community fix first.

The Canon Canon PIXMA TS3520 Wireless All-in-One Inkjet Printer has 8 other known error codes, including: 1000 (Support Code 1000 — No Paper / Paper Not Fed), 1300 (Support Code 1300 — Paper Jam (Rear Tray Area)), 1304 (Support Code 1304 — Paper Jam (Front / Cassette Area)), 1313 (Support Code 1313 — Paper Jam During Duplex Printing), 1430 (Support Code 1430/1401 — Print Head / Ink Cartridge Not Recognized), and 3 more.

Error code 1003 also appears on 4 other Canon models: Canon PIXMA G6020 MegaTank Wireless All-in-One Inkjet Printer, Canon PIXMA G7020 MegaTank Wireless All-in-One Inkjet Printer with ADF and Fax, PIXMA TR8620a 15 ppm Wireless All-in-One Inkjet Printer with Duplex, Fax, and 5-Color Ink System, PIXMA TS6420a 12 ppm Wireless Compact All-in-One Inkjet Printer with Auto Power On/Off. The fix may vary by model, so check each model's specific page for tailored repair steps.