Once restarted, the "Scanner Error" warning should disappear from the screen, and your status light will turn green, completely restoring your ability to use the printing functions of the device.
| OS | Before Patch | After Patch | |----|--------------|--------------| | Windows 11 | Scanner error after 1st scan | 50+ consecutive scans successful | | Ubuntu 24.04 | “Device busy” error | Scanning works via scanimage and XSane |
Press and hold down the Power/Stop button for 30 full seconds to drain any residual voltage from the capacitors on the motherboard.
Enter the tech password (default is usually 1934 or simply selecting "All Counters" ).
The on a Samsung SCX-4300 multifunction printer is a common hardware and firmware failure that completely locks up the device, preventing printing, copying, and scanning. samsung printer scx 4300 scanner error solution patched
The driver no longer sends the problematic lock command. The scanner stays unlocked, which is harmless because the CCD auto-parks.
Using USBpcap and Wireshark, we captured the communication between the Samsung driver ( ssusb.sys ) and the SCX-4300 (USB VID 0x04E8 , PID 0x3424 ).
: Samsung designed the SCX-4300 with strict internal counters for the toner cartridge and the imaging unit. When these counters reach zero, the printer logic board frequently misinterprets the sensor data, throwing a generic "Scanner Error" or "LSU (Laser Scanning Unit) Error" instead of a simple "Toner Empty" message.
Samsung released a firmware update to address scanner errors. According to the release notes for firmware version V1.13, one of the key updates was: . This confirms that Samsung itself identified and patched the scanner error problem. Once restarted, the "Scanner Error" warning should disappear
upon startup, the scanner carriage is likely struggling to find its "home" position. Spiceworks Community Clean the Reference Strip
Ultimate Fix: Samsung SCX-4300 Scanner Error Patched Solution
To accept the patch, the printer must be booted into a receptive state: Turn off the printer.
Plug the power cord back into a wall outlet (avoid surge protectors for this test to ensure maximum voltage delivery). The on a Samsung SCX-4300 multifunction printer is
If you own a multifunction printer, you’ve likely encountered the dreaded scanner error — often appearing as “Scanner locked” , “Scan error [error code]” , or simply a blinking red light and a non-moving scan head. After years of driver issues and Windows updates breaking compatibility, a reliable patched solution is finally available.
Enter again ( Menu > Copy > Left Arrow > Right Arrow > Menu > Right Arrow ). Press Menu , navigate to Tech Mode , and press OK .
: Ensure the internal ribbon cable connecting the scanner to the main board is not bent, cracked, or loose.
: If the error is caused by a physically broken belt, a dead motor, or a failed sensor, a "patch" cannot fix it. Bricking Risk
A command prompt window will briefly open and show progress bars. The printer's LCD screen will show that it is receiving data and flashing the image.
: The scanner attempts to find its "zero position" by reading a white strip under the glass. If the strip or glass is dirty, the motor keeps pulling the belt, causing a rattling sound and subsequent error.