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Fig 6-50 DC Controller/Scanner Connector Location – 6-55

Fig 6-51 Input Paper Sensor Arm -6-56

Fig 7-1 Paper Path and Components – 7-4

Fig 7-2 DC Controller PCA Components – 7-5

Fig 7-3 Top Door/T’oner Cartridge Plunger Assembly – 7-9

Fig 7-4 Engine Test Button and Printout (LJet 4L/4ML) -7-36

Fig 7-5 Defeating the Top Door Plunger (LJet 4P/4MP) – 7-37

Fig 7-6 Defeating the Exit Sensor Flag (LaserJet 4P/4MP) – 7-38

Fig 7-7 Leading Edge Adjustment – 7-43

Fig 7-8 Beam -to-Dru]m Mirror Adjustment – 7-45

Fig 7-9 Repetitive Image Defect Ruler – 7-46

Fig 7-10 Main Wiring Diagram – 7-47

Fig 8-1 Assembly Locations – 8-7

Fig 8-2 Covers and Doors (LaserJet 4L/4ML) – 8-8

Fig 8-3 Covers and Doors (LaserJet 4P/4MP) – 8-10

Fig 8-4 Internal Components 1 – 8-12

Fig 8-5 Internal Components 2 – 8-14

Fig 8-6 Internal Components 3 – 8-16

Fig 8-7 DC Controller Assembly – 8-18

Fig 8-8 Gear Train Plate Assembly – 8-20

Fig 8-9 Paper Cassette (LaserJet 4L/4ML) – 8-21

Fig 8-10 Paper Cassette (LaserJet 4P/4MP) – 8-22

Fig 8-11 Pickup Assemb] y – 8-23

Fig 8-12 Fuser Assembly – 8-24

Fig 8-13 Keyboard Overlay (LaserJet 4P/4MP) – 8-26

Fig B-1 Parallel Cable Pin Assignments – B-2

Fig B-2 Serial Pin-outs DB-25 to DB-9 – B-3

Fig B-3 Serial Pin-outs DB-9 to DB-9 – B-3

Fig B-4 Connecting to END of a LocalTalk Network – B-4

Fig B-5 Connecting to MIDDLE of a LocalTalk Network – B-5

vii

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HP LaserJet 4L Specifications

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