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48 Troubleshooting
Long test
❏ Make sure that paper is loaded in the printer.
❏ Turn the printer off.
❏ While holding down the control panel’s PAPER FEED button, turn the
printer on.
The long test prints the title followed by seven lines of text. If you are using a
color ribbon, each line of text is printed using a different color. This is followed
by continuous printing of the entire character set using each font and pitch
available. This sequence is repeated until you stop it by turning power off.
Since this test can generate many lines of text and graphics, it is a good idea to
perform this test only when using continuous fanfold paper rather than single
sheets.
Note:
The long test prints across the entire width of the carriage. Make sure that the
printer is loaded with the widest paper available in order to avoid damage to
the print head and platen. Also, the long text should be printed only on fanfold
paper.
Hexadecimal dump
This procedure prints in hexadecimal format all codes (character codes and
control codes) that are sent to the printer by the computer. The printer does not
execute any control codes (such as 0A - linefeed), it just prints them out. The
hexadecimal dump is useful when you are writing programs for printer control.
❏ Make sure that paper is loaded in the printer.
❏ Turn off the printer.
❏ While holding down the control panel’s PITCH and PAPER FEED
buttons, turn the printer back on to enter the Hex Dump Mode.
❏ To exit the Hex Dump Mode, first press ON LINE to set the printer off-line,
and then turn the printer off.