POWER-UP FUNCTIONS
In addition to their normal functions, all the control panel buttons have
special functions that operate if you hold them down while switching power
on.
Figutv 2-2 Power-up functions of control panel
Short test mode
If the printer is turned on while the ( ON LINE > button is pressed, the
printer will enter the short self-test mode. The printer will print the version
number of the printer’s ROM, followed by seven lines of the character set.
Each line will be offset by one character from the one before it. The final
result will be something like Figure 2-3. (If the color ribbon is used, eachline
prints in a different color.)
Figure 2-3. Short self-test
Since the self-test occupies the full width of the carriage, it is recommended
that the printer is loaded with the widest paper possible to avoid damage to
the print head and/or platen.
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