HP LaserJet 4200 
Main Assemblies (2 of 3) Diagram

Laser Scanner Assembly Cable - RG1-4212 18 Tooth Gear - RU5-0045 Feed Roller Shaft Bushing - RC1-0264 Left Side Sutter Assembly - RM1-0053 Scanner Cable 2 Guide - RC1-0385 Scanner Cable 1 Guide - RC1-0340 Paper Pickup Solenoid - RH7-5355 Power Switch Connection Rod - RC1-0268 Right Side Shutter Assembly - RM1-0054 Laser Scanner Assembly - RM1-0173
REF PART # DESCRIPTION
1 RM1-0173 Laser/scanner assembly
2 RM1-0054 Right side shutter assembly - Blocks light from scanner on right side
3 RC1-0268 Metal rod between external power button and switch on power supply board
4 RH7-5355 Paper pickup solenoid
5 RC1-0340 Guide for scanner cable 1
6 RC1-0385 Guide for scanner cable 2
7 RM1-0053 Left side shutter assembly - Blocks light from scanner on left side
8 RC1-0264 Feed roller shaft bushing - Bushing on right side of printer that supports the feed roller shaft.
9 RU5-0045 18 tooth gear - Located on right side of printer in the Tray 2 paper pickup assembly
10 RG1-4212 Laser Scanner Assembly Cable
For more information about the parts listed above go to  www.PrinterSupplies.com