Compaq LA36 user manual Thickness of your paper. See the Paper Thickness

Trouble-Shooting

Problem	Solution
Printing is too light or too dark.	Make sure that the ribbon cartridge is properly
	installed and that the ribbon feeds smoothly.
	Make sure that the paper thickness lever is set for the
	thickness of your paper. See the “Paper Thickness
	Lever Settings” table in Chapter 2, page 2-11.
	Check ribbon wear. Replace the ribbon if necessary.
Stains or smudges appear on the	Make sure that the paper thickness lever is set for the
page.	thickness of your paper. See the “Paper Thickness
	Lever Settings” table in Chapter 2, page 2-11.
	Check ribbon wear. Replace the ribbon if necessary.
	Check whether the tip of the print head is dirty.
	Clean the head with a soft cloth if necessary. For
	removing the print head, see the section “Replacing
	the Print Head” in Chapter 5, page 5-5.
The page is blank.	Make sure that the ribbon cartridge is properly
	installed. See the section “Installing the Ribbon
	Cartridge” in step 3 of the Installation Guide, on
	page 1-8.
Printing is erratic or the wrong	Make sure that the interface cable is securely
characters are printed. Many “?”	connected to both the printer and computer.
or unexpected characters are	Make sure that the printer protocol selected in your
printed.	software is the same as the protocol selected on the
	printer. See step 6 “Connecting the Printer to Your
	Host System” on page 1-17 of the Installation Guide.
	If you are using an DEC-423 serial interface, make sure
	that the serial settings required by your software or
	computer are the same as the settings on the printer.
	See the section “Changing Install Options” in Chapter
	4, page 4-26.
	If the PROTOCOL option is set to AUTO, the printer
	may not detect the proper protocol. Force this option
	according to your need. See the section “Changing
	Macro 1 and Macro 2 Options” in Chapter 4, page
	4-16.
Printing is vertically misaligned	Use the printer's vertical alignment function to check
(jagged).	the vertical print alignment. If necessary, adjust the
	print alignment. See the section “Checking Vertical
	Alignment” in this chapter, page 6-7.

6-2