Zebra Technologies Q3DLUBA000002, Q4DLU1B000000 manual From # of connections CPU Connector #

Cover.

6. Re-attach the MLB and display.

From	# of connections	CPU Connector #
Printhead	Flex circuit	J3
	(28 conductor)
Motor Cable	4	J4
Media Width	3	J11 (bottom
Sensor (optional)		of board)
Bar Sensor Cable	Flex circuit	J2
	(3 conductor)
Gap Sensro/	Flex circuit	J10
Printhead Ground	(5 conductor)
Label Presence Sensor	Flex Circuit	J5
	(4 conductor)

•Plug the cables from the printer back into the MLB per the following table:

7.Reassemble the Upper Cover and Module Housing

•Re-install the Upper Housing per AN16861-010 (QL320) or AN16753-007 (QL 420).

•When re-installing the Upper Housing for the QL 420, ensure that the proper Corner Attachment Kit (ref. AN16753-010) is also re-installed.

•Install the Module Housing as shown below Ensure the Module is secured with the retained screw through the battery compartment.

8.Install the Battery and test the unit.

•Install the Battery and turn the unit on.

•Verify that all indicator lights turn on properly.

•Verify proper operation of the printer by performing a two-key reset.

•It is recommended you perform a complete unit test to verify proper opera- tion of all the printer features.

RMAN-QLS-002 rev. A Repair Procedures • 2-80 •