Tomey UD-800 Instruction Manual page 154

■ 6-2
The maintenance switch on the side is in the P (up)
position.
Turn off the power, return the maintenance switch to
the down position, and then turn on the power.
 The whole monitor screen is dark and not easy to see.
The brightness of the monitor is low.
Adjust the brightness of the screen using the screen
brightness setting described in "3.9.1 General."
 The data cannot be printed by the built-in printer.
Printer paper.
Check the remaining printer paper.
Setting the output printer
Set "built-in printer" to the destination to which output
is directed when "Print button" is pushed. Refer to
"3.9.4 b) Selecting and setting printer" for setting
details.
The printer cover is open.
Check that the printer cover is completely closed.
The printer paper is not set in the correct direction.
Check that the printer paper is set correctly. (Refer to
"5.5.2 Printer paper")
 A different button to the one touched on the touch panel becomes
active.
The touch panel is not calibrated correctly.
Contact your local distributor.