Oki ML620 User Manual

ML620/ML621 User’s Guide 83
PROBLEM CAUSE SOLUTION
Printing slows down
Print direction changes
suddenly to unidirectional.
When the printhead overheats, the printer
automatically starts unidirectional split
printing.
The printer will return to its original operation
when the printhead temperature drops
sufciently.
Print Error warning
The print carriage does not
operate.
There is contamination on the carriage
shaft.
Clean any paper dust and contamination from
the carriage with a dry cloth.
Print blurring
The characters are too pale to
display properly on the paper.
The Paper Thickness lever position does not
match the paper.
Correct the Paper Thickness lever setting.
The printer is set to print at high speed. Set the speed to normal.
The ribbon has reached its end-of-life. Replace the ribbon with a new one.
The ribbon cartridge is not installed
correctly.
Reinstall the ribbon cartridge correctly.
The ribbon has been wound incorrectly. Replace the ribbon cartridge with a new one.
The ribbon is not transferring properly. Replace the ribbon cartridge with a new one.
A line of print is missing. Broken wire pins. Contact your dealer.
The printout differs from the screen display
Printout contains completely
different characters or
symbols.
Incorrect print setup for the user’s
application.
Reselect print setup for the applications
according to priority.
The application control codes for the
previous print operation are still enabled.
Initialize the printer.

Oki ML620 Specifications

General

Color	-
Maximum resolution	288 x 72 DPI
Mean time between failures (MTBF)	25000 h
Sound pressure level (printing)	55 dB
Sound pressure level (quiet mode)	52 dB
Standard interfaces	USB 2.0
Windows operating systems supported	Windows 2000, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Ultimate x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
AC input voltage	120 V
Dimensions (WxDxH)	438 x 375 x 191 mm