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HP LaserJet Pro 400 CZ195ABGJ manual 118

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© 2012 Hewlett-Packard Development Company, L.P.

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*CF270-90977* *CF270-90977*

CF270-90977

Contents

Page Page Page Page Conventions used in this guide Page Table of contents 2 Parts and diagrams Page Page List of tables Page List of figures Page Page Page 1 Removal and replacement Removal and replacement strategy Electrostatic discharge Required tools Types of screws Service approach Before performing service After performing service Post-servicetest Print-qualitytest order removal Parts Removal and replacement procedures Rollers Multipurpose (MP) tray pickup roller Multipurpose (MP) tray separation pad Reinstallation tip Page Tray 2 and optional Tray 3 pickup roller Tray 2 and optional Tray 3 separation pad Covers and control panel Left cover Right cover Top cover with LCD control-panelmodule LCD control panel Page Top cover with touchscreen control-panelmodule Page Touchscreen control panel Page Rear cover, rear door, and feed assembly Page Page Cartridge door and front cover assembly Page Page Main assemblies Laser scanner assembly Registration roller assembly Page Fuser assembly and paper feed guide Page Page Face down drive or duplex drive assembly Page Solenoids Tray 1 solenoid Duplex solenoid Page Motors and fans Main motor Page Fan Page Printed circuit-boardassemblies (PCAs) Engine controller assembly (DC controller) PCA Page Page Page Page Universal serial bus (USB) PCA Page Formatter PCA Wireless PCA Power switch PCA Page Connecting PCA Miscellaneous parts Transfer roller Multipurpose (MP) tray pickup gear assembly Optional paper feeder (Tray 3) Optional paper feeder right cover Optional paper feeder driver PCA Optional paper feeder paper sensor PCA Page Page Page 2 Parts and diagrams Order parts by authorized service providers Order replacement parts Related documentation and software Supplies part numbers Whole-unitreplacement part numbers Page How to use the parts lists and diagrams Assembly locations HP LaserJet M401a, M401n, M401d models HP LaserJet M401dn and M401dw models Optional paper feeder Covers, panels, and doors Page Page Page Internal assemblies Page Page Page Page Page Page Page Page Page Page Page Input devices 500-sheetpaper feeder Paper feeder covers Page Paper feeder main body (1 of 2) Page Paper feeder main body (2 of 2) Page Alphabetical parts list Page Page Page Page Numerical parts list Page Page Page Page Page Index