ASTRO-MED QLS-2000XE SERIES, Operation & Setup Manual, Page: 109 / 214

QLS-3000/2000 Xe Series 5-21
Keypad/Display
Use the following instructions to replace the keypad and/or display.
Caution: Circuit boards can be damaged by static electricity. Always use
standard anti-static procedures when working with these boards.
To replace the keypad/display:
1 Turn the printer off and unplug it. Open the printer cover.
2 Remove the back cover from the printer.
3 Disconnect the P11 ribbon cable from the controller board.
4 Remove the four screws from the sides of the bottom plate. Then slide
the bottom panel away from the printer. Note the hole in the main plate
that is used to feed the ribbon cable into the rear of the printer, and use
caution so the cable is not damaged.
5 Turn the bottom plate upside down to gain access to the circuit boards.
Two circuit boards are present. The smaller board is the display board,
and the larger board is the keypad board.
Note the orientation of each board. This information will be helpful
when installing replacement boards later in this procedure.
6 Unplug the wiring harnesses from the display board. Then disconnect
the four screws from the display board and remove it.
7 Remove the ten ¼ inch nuts from the keypad board, and then remove the
board. Ten spacers corresponding with the nuts are located beneath the