Alas you cannot clear the ram which is holding your print jobs. This is not a common problem but have seen it before. The only way to resolve it is to replace the main control board.
SOURCE: oki microline 520
It is likely that a few different things can cause this condition. First suggest looking for the paper present sensor. This is usually an optical sensor with a lever which contacts the paper. If the lever is broken, or sensor defective, an error condition is exhibited, and printer won't operate. There is also a sensor for printhead home position, and perhaps one or more sensors at one end of the platen assembly. Some printers sense whether a lever is set for tractor feed style paper, or for standard single sheet. A NEC p6200 has one, and probably other printers too. Check for the presence and proper operation of these. You might have to remove a cover to see them... As you probably know, dot matrix printers are practically dinosaurs these days. You should be able to pick up a decent Epson or other good model for practically nothing, if diagnosis on your rig is fruitless. Companies began getting rid of these critters years ago.
SOURCE: oki microline 590 elite
What driver are you using for this printer? Try loading a Epson LQ1050 driver and try again.
Dezzi
SOURCE: Problem with oki microline 395
Enter the menu,
Change Language set to American. It is under symbol sets. Also change code page to usa.
Menu Mode
1. Verify that paper and the ribbon are installed.
2. Power ON the printer
.
3. Press SELECT and place the printer OFF-LINE (SELECT will not be lit).
4. Press QUIET to enter Menu Mode.
5. The line shown below will print.
Printer Control Emulation Mode Epson LQ 6. Go to Step A to print the current menu.
Go to Step B to change the menu.
Step A
Press PRINT to print the current Menu.
Press EXIT to exit Menu Mode.
The printer will go ON-LINE. (SELECT will light.)
Step B
Press GROUP to move through the groups of the Menu.
A line prints, showing the Group.
Press ITEM to move through the items in a group.
A line prints, showing the Item.
Press SET to change the setting for an item.
A line prints, showing the Setting.
Press EXIT to exit Menu Mode.
The printer will go ON-LINE. (SELECT will light.)
SOURCE: font size
Probably the monitor-chip on the board is working inproperly.
Consult the vendor or manufacuturer.
But before this, you may download new monitor driver from the manufacturer.
SOURCE: oki microline 3320 doesnt stop in the right place for next invoic
Look on preferences, check if A4 is used for paper layout...
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