: A stable USB cable connecting the printer directly to the PC. Do not use a wireless connection for firmware updates.
: To allow the printer to function with refilled cartridges or cartridges without a CRUM chip. Pre-Requisites for Installation Before starting, ensure you have the following:
: Hold the Print Screen/WPS button for about 10 seconds to print a report. Verify your Serial Number (SN) and current firmware version to ensure compatibility with V1.01.00.30. Fix Ml1660 V1.01.00.30.fls
: Once the printer restarts, the toner counters should reset to 100%. If you applied a chip-fix, you can now cover the toner cartridge chip with tape to continue printing. Troubleshooting Common Errors
: Drag and drop the FIX_ML1660_V1.01.00.30.fls file onto the usbprns2.exe application icon. Alternatively, run the download.bat file if your package includes one. : A stable USB cable connecting the printer
: This often indicates low toner or a minor paper jam rather than a firmware failure.
: To resolve "Outdated Firmware" messages or communication timeouts between the computer and printer. If you applied a chip-fix, you can now
The .fls file is the raw firmware data used to reprogram the printer's "brain." Applying this fix is typically done for two reasons:
: Turn off the printer. Hold the Cancel/Stop button and turn the printer on. Release the button when the lights begin to flash.
: The status LED will blink rapidly, indicating the reprogramming process is active (approx. 2–4 minutes). Do not turn off the printer until it automatically restarts or the light remains solid green.