HP LaserJet 4L Service Manual

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Fig 6-42
Phillips vs. Posidriv Screwdrivers – 6-3
Memory Module (LaserJet 4L) – 6-4
SIMM Access Panel (LaserJet 4P/4MP) – 6-5
Power Access Door (LaserJet 4L/4ML) – 6-6
Printer Cover Screws (Laser,Jet 4L/4ML) – 6-7
Releasing the Printer Cover Rear Tabs – 6-8
Control Panel Connector (LaserJet 4P/4MP) – 6-9
Printer Cover Screws (Laser, Jet 4P/4MP) – 6-10
Cover (LaserJet 4P/4MP) – 6-11
Rear Door – 6-12
Control Panel Assembly (LaserJet 4P/4MP) -6-13
Control Panel RFI Shield (LaserJet 4P/4MP) -6-14
Formatter Shield and PCA – 6-15
DC Controller Connector& Switch Actuator – 6-16
Gear Train Assembly – 6-17
Screw Tightening Sequence Example – 6-18
Main Motor – 6-19
Oblique Roller Assembly – 6-20
Tray Forms Size Guide – 6-21
Paper Cassette Assemblies – 6-22
Laser/Scanner Assembly – 6-23
Fan – 6-24
Power Switch Assembly (LaserJet 4P/4MP) – 6-25
Paper Guide/Roller Assembly – 6-26
Transfer Roller -6-27
Beam-to-Drum Mirror – 6-29
Fusing Assembly – 6-30
Fusing Pressure Plate – 6-31
Upper Fusing Assembly – 6-32
Fuser Delivery Assembly – 6-33
Lower Delivery Roller – 6-34
Lower Delivery Guide and Exit Sensor Flag – 6-35
Fuser Connector Assembly – 6-36
Upper Output Roller Assembly – 6-37
Lower Output Rollers – 6-38
DC Controller Assembly – 6-40
Pickup Feed Roller Solenoid – 6-41
Machine Screw Locations (DC Controller PCA) – 6-43
Metal Backing Plate – 6-44
DC Controller PCA – 6-45
D-Roller – 6-46
Pickup Feed Roller Assembly (side view) – 6-47
Fig 6-43 Pickup Feed Roller Assembly (bottom view) – 6-48
Fig 6-44 Feeder Guide Assembly – 6-49
Fig 6-45 Small Media Roller Assembly – 6-50
Fig 6-46 Static Eliminator Strip – 6-51
Fig 6-47 Toner Cartridge Lever Assembly – 6-52
Fig 6-48 Top Cover Switch {Plunger Assembly) -6-53
Fig 6-49 Releasing the Side Tabs – 6-.54
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HP LaserJet 4L Specifications

General

Print Technology	Laser
Print Resolution	600 x 600 dpi
Print Speed	4 ppm
Input Capacity	100 sheets
Connectivity	Parallel
Processor	Motorola 68000
Standard Memory	1 MB
Maximum Memory	5 MB
Printer Language	PCL 4
Duty Cycle	12, 000 pages per month
Paper Sizes	Letter, Legal, A4