Code :

Code: 18
Display: The printer is not working (1)
Description: While Power turned on, the printer is not working in the printing mode.
Causes: 1. Run Self-Test Mode : Turn the power on and pressing “System Data List” by pressing Menu-Reports-System Data. 2. Check if the PC and the printer is properly connected and the toner cartridge installed. 3. Printing is not working in the Windows. 4. Check if the printer cable is directly connected to peripheral devices

Code: 19
Display: The printer is not working (2)
Description: After receiving the printing order, no response at all or the low speed of printing occurs due to wrong setup of the environment rather than malfunction of the printer itself.
Causes: 1. Secure more space of the hard disk. 2. Printing error occurs even if there is enough space in the hard disk. 3. Check the parallel-port-related items in the CMOS Setup. 4. Reboot the system to print.

Code: 20
Display: Abnormal Printing
Description: The printing is not working properly even when the cable has no problem. (even after the cable is replaced) If the printer won't work at all or the strange fonts are repeated, the printer driver may be defective or wrong setup in the CMOS Setup.
Causes: 1. Set up the parallel port in the CMOS SETUP. 2. Printer Driver Error. 3. Error message from insufficient memory. (The printing job sometimes stops or due to insufficient virtual memory, but it actually comes from the insufficient space of the hard disk.)

Code: 21
Display: SPOOL Error
Description: To spool which stands for "simultaneous peripheral operations online" a computer document or task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more convenient time (for example, when a printer is finished printing its current document).
Causes: 1. Insufficient space of the hard disk in the directory assigned for the basic spool. 2. If the previous printing error not solved. 3. When expected to collide with other program. 4. When an application program or the printer driver is damaged. 5. When some files related to OS are damaged or virus infected

Code: 22
Display: Vertical Black Line and Band
Description: 1. Straight thin black vertical line occurs in the printing. 2. Dark black vertical band occur in the printing.
Causes: 1. Damaged develop roller in the Developer. Deformed Doctor-blade or cleaningblade. 2. Scratched surface of the discharge roller in the developer. 3. Partly depression or deformation on the surface of the transfer roller.

Code: 23
Display: Vertical White Line
Description: White vertical voids in the image.
Causes: 1. Foreign matter stuck onto the window of internal lenses of LSU mirror. 2. Foreign matter or toner particles between the developer roller and blade. (In case the life of the developer has been expired, white lines or light image occur in front of the image.) 3. It may occur when Burr and foreign substances are on the window of the developer frame. 4. If the fuser is defective, voids occur periodically at the top of a black image.

Code: 24
Display: Horizontal Black Band
Description: 1. Dark or blurry horizontal stripes occur in the printing periodically. (They may not occur periodically.)
Causes: 1. Bad contacts of the voltage terminals to developer. 2. The rollers of developer may be stained. OPC Drum = 75.5mm Charge Roller = 37.7mm Supply Roller = 47.5mm Develop Roller = 35.2mm Transfer Roller = 46.2mm Heat Roller = 63.9mm Pressure Roller = 75.4mm

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