HP laserJet pro 300/400 Service Manual

This HP laserJet pro 300/400 Service Manual contains information removal and replacement strategy, this chapter describes the removal and replacement of replaceable units (FRU) field only. Generally FRU replacement is the reverse of the removal procedures. From time to time, notes and tips are included to provide directions of comments for the dif cult or critical replacement procedures. HP does not support the repair of individual subassemblies or troubleshooting to the component level. Note the length, diameter, color, type and location of each screw. Be sure to return each screw to its location of origin during reassembly. Correctly routed or bundles of loose cables may interfere with other internal components and can be damaged or broken. Harness frayed or pinched wires can be dif cult to nd. When replacing the wire bundles, always use the supplied wire loop. This chapter describes the removal and replacement of replaceable units (FRU) on-site only. Replace the FRU is usually the reverse of removal. Sometimes, notes and advice are provided to provide guidelines for difficult or critical replacement procedures.

Removal and replacement strategy. WARNING! Turn off the product, wait 5 seconds, and then remove the power cord before attempting to service the product. If this warning is not followed, serious injury, as well as product damage may result. Supply must be turned on for certain functional checks during troubleshooting. However, disconnect the power supply during the extraction of parts. Never operate or repair the product with the protective cover removed from the joint laser / scanner. The reflected beam, although invisible, can damage your eyes. The sheet metal parts may have sharp edges. Be careful when handling sheet metal parts. CAUTION: Do not bend or crimp the flat flexible cables (FFC) during removal or installation. In addition, do not straighten the pre-pliegues in the FFC. You must place all the FFC in their connectors. If a FFC on a connector is not fully seated, a short-circuit may occur in a PCA. NOTE: To install a self tapping screw, turn it first in an anti-clockwise direction to align it with the existing thread pattern, and then turn it carefully in the clockwise direction to tighten it. Do not tighten. Repair the screw hole or if a self-tapping screw hole is removed, replace the affected Assembly.

Table of contents HP laserJet pro 300/400 Service Manual

Removal and replacement

Solve problems

Part and diagram

Service and support

Product specifications

Regulatory information

Download HP laserJet pro 300/400 Service Manual

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