HP LaserJet 2100 
Internal Components (2 of 3) Diagram

Registration Assembly - RG5-4129 Compression Spring - RS6-2022 14 Tooth Registration Roller Drive Gear - RS6-0445 Tray 1 Right Roller Bushing - RB2-3044 Tray 1 Left Roller Bushing - RB2-3043 26 Tooth Tray 1 Pickup Roller Drive Gear - RB2-3040 Transfer Roller Bushing - RB2-2926 Left Side Toner Cartridge Guide - RB2-2831 Right Side Toner Cartridge Guide - RB2-2830 Compression Spring - RS6-2023 Rubber Foot - RB2-2816 Rubber Foot - RB2-2816 Torsion Spring - RB2-2843 Paper Sensor Flag - RB2-2842 Compression Spring - RC1-1009 Transfer Roller Assembly - RG5-4164 17 Tooth Transfer Roller Drive Gear - RS6-0459 15 Tooth Upper Delivery Roller Drive Gear - RS6-0441 Upper Delivery Roller - RF5-2604 Upper Delivery Roller Bushing - RB2-2850 Upper Delivery Roller Bushing - RB2-2850 Delivery Roller Assembly - RG5-4119 Face Down Deliver Roller - RB2-2849 Tensioning Spring - RS6-2025 Cassette Pickup Gear Assembly - RG5-4156 Tray 1 Pickup Roller Assembly - RG5-4128 Dowel Pin - XD9-0159 Dowel Pin - XD9-0159 Guide Roller - RB2-2904 Guide Roller - RB2-2904 Right Side Pickup Roller Cam - RB2-2903 Left Side Pickup Roller Cam - RB2-2902 Tray 1 Pickup Roller - RB2-2900
REF PART # DESCRIPTION
1 RB2-2900 Pickup roller - MP/TRAY 1 pickup roller
2 RB2-2902 Pickup roller cam - Left side
3 RB2-2903 Pickup roller cam - Right side
4 RB2-2904 Guide roller (free spinning white plastic roller) - Mounts on the paper pickup drive shaft on each side of the pickup 'D' shaped roller
5 XD9-0159 Dowel pin - Holds roller/cam pieces on roller dowel
6 RG5-4128 Multi-purpose tray pickup roller assembly - Includes pickup roller, roller cam, right and left cams, both round rollers and dowel pin
7 RG5-4156 Cassette pickup gear assembly
8 RS6-2025 Tensioning spring - For the paper pickup gear assembly
9 RB2-2849 Face-down delivery roller - Lower rollers - Four used
10 RG5-4119 Delivery roller assembly - Lower face-down output roller assembly - Includes roller and holder Four used
11 RB2-2850 Upper delivery roller bushing - Roller bushing - Supports face-down upper delivery roller
12 RF5-2604 Delivery roller - Upper face-down delivery roller
13 RS6-0441 Upper delivery roller drive gear - 15 tooth - Drive gear - Upper delivery roller drive gear - 15 tooth
14 RS6-0459 Transfer roller drive gear - 17 tooth
15 RG5-4164 Transfer roller assembly - Includes left side bushing
16 RC1-1009 Compression spring - Provides electrical ground connection
17 RB2-2842 Paper sensor lever - Flag that mounts below registration assembly and passes through middle of metal plate - Activates PS502 the top of paper sensor
18 RB2-2843 Torsion spring - Provides a small amount of back pressure for the paper sensor flag
19 RB2-2816 Rubber foot - Non-slip replacement rubber foot - Attaches to the bottom of the tray-3 assembly (four used)
20 RS6-2023 Compression spring - Provides tension for the lower face-down delivery roller assembly
21 RB2-2830 Cartridge guide - Right side toner cartridge guide
22 RB2-2831 Cartridge guide - Left side toner cartridge guide
23 RB2-2926 Transfer roller bushing - Supports right side of transfer roller
24 RB2-3040 Gear - 26 tooth - Tray 1 pickup roller drive gear
25 RB2-3043 Left roller bushing - Acts as the bearing and retainer for the left end of the paper pickup roller assembly   (tray 1)
26 RB2-3044 Right roller bushing - Acts as the bearing and retainer for the right end of the paper pickup roller assembly (tray 1)
27 RS6-0445 Registration roller drive gear - 14 tooth - Gear - 14 tooth - Drives registration roller
28 RS6-2022 Compression spring - Provides tension for right side of transfer roller bushing
29 RG5-4129 Registration assembly - Registration shutter and roller with holder frame assembly
For more information about the parts listed above go to www.PrinterSupplies.com