HP Pro 4300 C9H70UT C9H70UT#ABA manual Removal and replacement strategy, Required tools

Removal and replacement strategy

This chapter describes how to remove, replace, and reassemble the major assemblies of the printer. Replacement is generally the reverse of removal. To identify the left side and right side of the printer, face tray 1 on the front of the unit.

WARNING! Unplug the power cord from the power outlet (at the wall receptacle) before attempting to service the product. If you do not follow this warning, severe injury can result. Certain functional checks during troubleshooting might require power to be supplied to the product. However, all power should be turned off and the product should be unplugged when you remove any product assemblies or components. Never operate or service the printer when the protective cover is removed from the laser/scanner assembly. The reflected beams, although invisible, can damage your eyes.

CAUTION

The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation. If an ESD-protected workstation is not available, discharge body static by grasping the printer chassis before touching an ESD-sensitive component. Ground the printer chassis before servicing the product.

Required tools

●#2 Phillips screwdriver

●small flat-blade screwdriver

●needle-nose pliers

●ESD mat (if available; see the ESD caution above)

●penlight (optional)

●Tape (optional)

CAUTION A PoziDriv screwdriver will damage screw heads on the product. Use a #2 Phillips screwdriver.

Before performing service

●If possible, print a menu map and configuration page. See the “Menu map” on page 240 and“Configuration page” on page 241.

●Remove all of the accessories and print media, the print cartridge, and tray 2 from the product.

●Unplug the power cord from the power outlet at the wall receptacle.

●Place the product on an ESD mat, if one is available. If an ESD-protected workstation is not available, discharge body static by grasping the printer chassis before touching an ESD-sensitive component. Ground the printer chassis before servicing the product

After completing service

●Reinstall the print cartridge (remove the print cartridge prior to transporting the printer back to the customer).

●Reconnect all cables to the product.

●Replace all of the accessories and load the media.

●Print a configuration page and verify that the latest firmware is installed on the printer. See “Downloading a remote firmware update” on page 63.

Q2431-90912 Chapter 6 Removing and replacing parts 133