HP — HP LaserJet Pro 400 M401 Printer Series Repair Manual (EN)

Figure 1-33 Remove the laser scanner assembly (2 of 2) .......................................................................... 27 Figure 1-34 Remove the registration assembly (1 of 3) ............................................................................ 28 Figure 1-35 Remove the registration assembly (2 of 3) ............................................................................ 28 Figure 1-36 Remove the registration assembly (3 of 3) ............................................................................ 29 Figure 1-37 Remove the fuser (1 of 5) ...................................................................................................

30 Figure 1-38 Remove the fuser (2 of 5) ................................................................................................... 30 Figure 1-39 Remove the fuser (3 of 5) ................................................................................................... 31 Figure 1-40 Remove the fuser (4 of 5) ................................................................................................... 31 Figure 1-41 Remove the fuser (5 of 5) ................................................................................................... 32 Figure 1-42 Remove the face-down-drive or duplex drive assembly (1 of 2) ................................................

33 Figure 1-43 Remove the face-down-drive or duplexing-paper-feed assembly (2 of 2) ................................... 33 Figure 1-44 Remove the Tray 1 pickup solenoid (1 of 2) .......................................................................... 34 Figure 1-45 Remove the Tray 1 pickup solenoid (2 of 2) .......................................................................... 35 Figure 1-46 Remove the duplex solenoid ............................................................................................... 36 Figure 1-47 Remove the main motor (1 of 4) ..........................................................................................

37 Figure 1-48 Remove the main motor (2 of 4) .......................................................................................... 38 Figure 1-49 Remove the main motor (3 of 4) .......................................................................................... 38 Figure 1-50 Remove the main motor (4 of 4) .......................................................................................... 39 Figure 1-51 Remove the fan (1 of 2) ...................................................................................................... 40 Figure 1-52 Remove the fan (2 of 2) ......................................................................................................

40 Figure 1-53 Allow the engine controller assembly to cool ......................................................................... 41 Figure 1-54 Remove the engine controller assembly (1 of 9) ..................................................................... 42 Figure 1-55 Remove the engine controller assembly (2 of 9) ..................................................................... 42 Figure 1-56 Remove the engine controller assembly (3 of 9) ..................................................................... 43 Figure 1-57 Remove the engine controller assembly (4 of 9) .....................................................................

43 Figure 1-58 Remove the engine controller assembly (5 of 9) ..................................................................... 44 Figure 1-59 Remove the engine controller assembly (6 of 9) ..................................................................... 44 Figure 1-60 Remove the engine controller assembly (7 of 9) ..................................................................... 45 Figure 1-61 Remove the engine controller assembly (8 of 9) ..................................................................... 45 Figure 1-63 Remove the USB PCA (1 of 2) .............................................................................................

47 Figure 1-62 Remove the engine controller assembly (9 of 9) ..................................................................... 46 Figure 1-64 Remove the USB PCA (2 of 2) ............................................................................................. 47 Figure 1-65 Remove the formatter ......................................................................................................... 48 Figure 1-66 Remove the wireless PCA ................................................................................................... 49 Figure 1-67 Remove the power-switch PCA (1 of 3) .................................................................................

50 Figure 1-68 Remove the power-switch PCA (2 of 3) ................................................................................. 50 Figure 1-69 Remove the power-switch PCA (3 of 3) ................................................................................. 51 Figure 1-70 Remove the connecting PCA ............................................................................................... 51 Figure 1-71 Remove the transfer roller ................................................................................................... 52 Figure 1-72 Remove the paper-pickup-gear assembly ..............................................................................

53 Figure 1-73 Remove the optional paper feeder right cover ....................................................................... 54 xii ENWW