Zebra 3742 Service Manual download pdf (Page 53)

Print Head Replacement 980357-290A

Preparations

Protect against static discharge. Your work area must be static-safe and include

a properly grounded conductive cushioned mat to hold the printer and a

conductive wrist strap for yourself.

While the two print heads from different manufacturers are functionally

equivalent, each requires its own cable. See the Swapping the Cables

procedure at the end of this procedure.

Open the cover, and remove any media and ribbon (if necessary).

Removal

1. Pull the release lever ! to unlatch the carriage; then, open the carriage " to its raised

position.

2. Use a #1 Phillips driver to remove the screw 1 that holds the print head 2 to the carriage.

3. Detach the print head from the wire bundle and pull the print head away from the printer.

Assembly

1. Align the print head 2 so that the wire

connector is on top and facing the rear

of the printer.

2. Plug the print head into the wire

bundle. Take care not to bend any of

the wires.

3. Replace the center screw 1 that holds

the print head. Use a Phillips #1 driver

to tighten it. Tighten to 2.5 ± in lb

torque.

4. Clean the print head.

Check the Installation

Reload media and ribbon, if necessary.

Plug in the power cord, turn on the printer

and run the AutoSense routine to get a dump

mode printout. This action tests the printer's

media drive and printing capabilities.

980357-001 Rev. A 45

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Zebra 3742 Service Manual Page 53