Casio KL-780 Troubleshooting, • Power Supply, • Text Input, •Printing, ESC, Page, Page, FUNC, FUNC, Page, Page, Page, E-22, Action, Action, Action, Action, Action

Troubleshooting

• Power Supply

Nothing appears on the display.
Possible Causes	Action	Page
Low batteries	Replace batteries.	E-6
Improper display contrast	Adjust display contrast.	E-8
setting
Batteries loaded	Remove batteries and reload them	E-7
incorrectly	correctly.
AC adaptor is not	Make sure the AC adaptor is	E-7
connected correctly.	connected correctly.

• Text Input

Cannot input text.

Possible Causes	Action	Page
FUNC key has been	Press ESC to clear FUNC key	E-9
pressed.	operation.

•Printing

Tape does not come out when PRINT is pressed.

Possible Causes	Action	Page
Tape cartridge	Securely close the cover.
compartment cover is not		E-8
closed completely.
No more tape left in the	Replace the tape cartridge with a	E-8
cartridge.	new one.
Tape jam	Remove the tape cartridge and pull
	out the jammed tape by hand. Cut off
	excess tape with scissors, and
	carefully replace the cartridge into
	the label printer.	E-8

Important!

Never allow the tape outlet to become blocked and never touch tape as it is being fed during printing.

Tape comes out when PRINT is pressed, but nothing is printed on it.

Possible Causes	Action	Page
Only blank spaces were	Input the text you want to print.	E-9
input.
Printing is blurred, blotched, broken, etc.
Possible Causes	Action	Page
Improper print density	Adjust the print density setting.	E-17
setting
Improper loading of the	Remove the tape cartridge and	E-8
cartridge	reload it correctly.
Dirty printer head or	Clean the printer head and roller.	E-20
rubber roller

E-22