| Problem | Solution | |--------|----------| | Tool doesn’t detect printer | Ensure USB cable is connected after entering service mode. Disable firewall/VPN temporarily. | | Error "No printer in service mode" | Re-enter service mode carefully. The MB2140 requires precise button timing. | | Tool crashes on Windows 10/11 | Run in Windows 7 compatibility mode. Disable real-time antivirus temporarily. | | Counter resets but error returns next day | The waste ink pads are truly full. You must open the printer and clean/replace the pads. | | Ink leak after reset | Turn off printer immediately. The pads are oversaturated. Physical cleaning is mandatory. |
The Canon MAXIFY MB2140 is a business-oriented inkjet printer. Like most modern inkjet printers, it contains an internal "absorber counter" that estimates the saturation of the waste ink pad. When this counter reaches a predefined limit, the printer halts operation and displays an error (typically "Support Code 5B00" or a warning regarding the waste ink absorber).
To resolve this without hardware replacement, a "Service Tool" is required to reset the counter to zero.
This is a gray area. Canon does not officially distribute the service tool to end users. It is intended for authorized service centers. However, the tool has been leaked online by technicians and enthusiasts.
Safety considerations for 2021 users:
Legal note: Resetting the counter does not physically replace the waste ink pads. If the pads are truly saturated, ink may leak inside the printer, causing damage or electrical shorts. Use this tool at your own risk. canon mb2140 service tool 2021
Before diving into the service tool, it’s crucial to understand the error. The Canon MB2140 (part of the MAXIFY series) uses an internal waste ink absorber pad or "ink collection sponge." Over time, ink droplets from cleaning cycles, printhead maintenance, and borderless printing collect in this pad.
The printer tracks this usage with an internal counter. Once the counter reaches a predetermined limit (usually around 7,000–8,500 pages or a specific volume of ink), the printer triggers an error:
Canon’s official solution: Replace the waste ink pads (a costly and labor-intensive process) or replace the printer.
The 2021 reality: Many users discovered that the pads are often not completely full. The counter is a conservative safety measure. By resetting the counter using the Canon MB2140 Service Tool 2021, you can continue printing.
The Canon Service Tool (also known as a resetter or adjustment program) is an unofficial software application designed to interface with your printer’s service mode. This tool communicates directly with the printer’s EEPROM (memory chip) to reset specific counters. | Problem | Solution | |--------|----------| | Tool
Key functions of the 2021 version for the MB2140 include:
Important Distinction: This is not a driver or a firmware update. It is a maintenance utility. The "2021" designation typically indicates a version of the tool (e.g., v4720, v3400) that was confirmed to work with the MB2140’s firmware up to the year 2021.
Although the keyword specifies "2021," the MB2140 remains a workhorse for small offices and home users. It features:
If you still use this printer in 2025, resetting it with the 2021 service tool can extend its life by months or even years – provided you monitor ink pad saturation.
Cost comparison:
Thus, the service tool is a no-brainer.
Here’s where most users fail. The v2021 tool will only see the printer if you have the Canon generic USB print driver installed, not the full feature driver. On Windows 10/11, you have to manually force the printer into "USB Printing Support" mode via Device Manager.
I spent three hours troubleshooting before realizing the tool was looking for a device named "CANONMB2100 series" while Windows had renamed it "USB Composite Device." Once you fix that, it works. But that hurdle is why this tool gets 1-star reviews from frustrated beginners and 5-stars from veterans.
Executables labeled "Service Tool 2021" found on the internet are frequently bundled with malware, trojans, or adware. As these are unauthorized cracks, they lack digital signatures and security verification.