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Writer's pictureWilliam DeMuth
Jun 18, 20195 min read

HP M551 Laser Printer Part Diagrams

Updated: Jun 19, 2019

HP M551 Laser Printer Part Diagrams


Laser Printer Parts > Printer Parts Diagrams > HP M551 Parts Diagrams HP LaserJet Enterprise Printers

  • M551 Printer

HP M551 Printer Parts Diagram Index

  1. HP M551 Covers, Panels and doors printer parts diagram

  2. HP M551 Right door assembly printer parts diagram

  3. HP M551 Internal Components 1 of 5 printer parts diagram

  4. HP M551 Internal Components 2 of 5 printer parts diagram

  5. HP M551 Internal Components 3 of 5 printer parts diagram

  6. HP M551 Internal Components 4 of 5 printer parts diagram

  7. HP M551 Internal Components 5 of 5 printer parts diagram

  8. HP M551 ADF and scanner assemblies printer parts diagram

  9. HP M551 Paper pickup assembly printer parts diagram

  10. HP M551 PCA assembly printer parts diagram

  11. HP M551 1 x 500 sheet paper feeder printer parts diagram

  12. HP M551 Paper feeder covers printer parts diagram

  13. HP M551 Paper feeder main body printer parts diagram

  14. HP M551 Paper Cassette printer parts diagram

  15. HP M551 Paper Feeder PCA printer parts diagram

 

1. HP M551 Covers, Panels and doors printer parts diagram

HP M551 Covers, Panels and doors printer parts diagram
HP M551 Covers, Panels and doors printer parts diagram

  • 1 Cover, rear upper RC2-5058-000CN 1

  • 2 Plate, blanking RC2-5938-000CN 1

  • 3 Cover, left lower RC3-1112-000CN 1

  • 4 Cover, left front RC3-1113-000CN 1

  • 5 Cover, rear lower RC3-1114-000CN 1

  • 6 Cover, rear RC3-1115-000CN 1

  • 7 Cover, right rear RC3-1116-000CN 1

  • 8 Cover, right lower RC3-1117-000CN 1

  • 9 Cover, upper RC3-1118-000CN 1

  • 11 Tray, paper delivery RL1-1941-030CN 1

  • 12 Operation (control) panel assembly RM1-8096-000CN 1

  • 13 Cover, USB (simplex) RC3-1093-000CN 1

  • 13 Cover, USB (duplex) RM1-8173-000CN 1

  • 15 Cover, left assembly RM1-8159-000CN 1

  • 16 Cover, right-front assembly RM1-8165-000CN 1

 

2. HP M551 Right door assembly printer parts diagram

2. HP M551 Right door assembly printer parts diagram
2. HP M551 Right door assembly printer parts diagram

  • 1 Right-door assembly (simplex) RM1-8167-000CN 1

  • 1 Right-door assembly (duplex) RM1-8123-000CN 1

  • 2 Duplexing paper feed assembly RM1-4959-000CN 2

 

3. HP M551 Internal Components 1 of 5 printer parts diagram

3. HP M551 Internal Components 1 of 5 printer parts diagram
3. HP M551 Internal Components 1 of 5 printer parts diagram

  • 1 Left cable assembly RM1-5742-000CN 1

  • 2 Holder, CST positioning RC3-1231-000CN 1

  • 3 Cover, front inner lower unit (CMK) RL1-1914-020CN 1

  • 5 Cover, front inner, upper RC3-1070-000CN 1

  • 6 Cover, front inner lower (Y) RL1-1915-000CN 1

  • 8 Roller, rail RC2-4831-000CN 1

  • 12 Waste toner detect assembly RM1-5696-000CN 1

  • 13 Waste toner duct assembly RM1-8138-000CN 1

  • 17 Spring, tension RU7-2192-000CN 4

  • 19 Lever, cartridge pressure front RC2-3983-030CN 4

  • 24 Lock, door RC2-5937-000CN 2

  • 26 Lever, box presence detect RC2-5951-000CN 1

 

4. HP M551 Internal Components 2 of 5 printer parts diagram

4. HP M551 Internal Components 2 of 5 printer parts diagram
4. HP M551 Internal Components 2 of 5 printer parts diagram

  • 1 Fan cable assembly RM1-5746-000CN 1

  • 5 Spring, tension RU6-2436-000CN 2

  • 12 Cover RC2-5912-000CN 3

  • 18 Cover RC2-5962-000CN 1

  • 21 Spring, compression RU6-2316-000CN 2

  • 23 Lever, shutter RC2-4415-000CN 2

  • 27 Temperature sensor assembly RK2-3267-000CN 1

  • 29 Toner sensor holder assembly RM1-5700-000CN 4

  • 30 Fan (FM2, FM3) RK2-2418-000CN 2

  • 33 Connecting cable assembly RM1-5749-000CN 1

  • 34 Sensor cable assembly RM1-5740-000CN 1

  • 35 Sensor cable assembly RM1-5741-000CN 1

  • 36 Motor/sensor cable assembly RM1-5752-000CN 1

 

5. HP M551 Internal Components 3 of 5 printer parts diagram

5. HP M551 Internal Components 3 of 5 printer parts diagram
5. HP M551 Internal Components 3 of 5 printer parts diagram

  • 6 Wire, (mech) sensor protect RC2-4828-000CN 1

  • 7 Sensor cable guide assembly RM1-8178-000CN 1

  • 8 Cover, right lower inner RC2-5019-000CN 1

  • 9 Link, interlock RC2-5120-000CN 1

  • 10 Mount, interlock switch RC2-5123-000CN 1

  • 11 Arm, interlock link switch RC2-5121-000CN 1

  • 13 Link, interlock RC2-5119-000CN 1

  • 14 Link, interlock RC2-5118-000CN 1

  • 17 Shaft RC2-5913-000CN 1

  • 27 Link, interlock RC2-5122-000CN 1

  • 29 Microswitch WC4-5171-000CN 1

  • 30 Door switch assembly RM1-5732-000CN 1

  • 31 Switch, PCA assembly RM1-8097-000CN 1

  • 34 Density detect assembly RM1-8163-000CN 1

  • 35 Pick up lower guide assembly RM1-8132-000CN 1

  • 43 Paper delivery assembly (simplex) RM1-5003-050CN 1

  • 43 Paper delivery assembly (duplex) RM1-4970-060CN 1

  • 44 Registration assembly (simplex) RM1-5009-000CN 1

  • 44 Registration assembly (duplex) RM1-4969-000CN 1

  • 45 Rear lock arm assembly RM1-5533-000CN 1

 

6. HP M551 Internal Components 4 of 5 printer parts diagram

6. HP M551 Internal Components 4 of 5 printer parts diagram
6. HP M551 Internal Components 4 of 5 printer parts diagram

1 Fusing connecting cable assembly RM1-5714-000CN 1

6 Fan (FM1) RK2-2416-000CN 1

7 Cable, flat 2 laser RK2-3943-000CN 1

11 Switch arm RC2-5943-000CN 1

14 MP sensor cable assembly (simplex) RM1-5750-000CN 1

14 MP sensor cable assembly (duplex) RM1-5737-000CN 1

16 Cable, flat 1 scanner RK2-3941-000CN 1

 

7. HP M551 Internal Components 5 of 5 printer parts diagram

7. HP M551 Internal Components 5 of 5 printer parts diagram
7. HP M551 Internal Components 5 of 5 printer parts diagram

  • 1 Duplexing unit cable assembly RM1-5730-000CN 1

  • 5 Auto close assembly RM1-8137-000CN 1

  • 7 Lifter drive assembly RM1-8136-000CN 1

  • 8 Main motor unit (M3, M4, M5) RM1-8105-000CN 3

  • 12 Connector, drawer VS1-7258-007CN 1

  • 13 Photo interrupter, TLP1243 WG8-5935-000CN 1

  • 14 Cassette paper pick up drive assembly (M13) RM1-8135-000CN 1

  • 14A Pickup motor assembly (M13) RM1-5773-000CN 1

  • 19 Rear Pre-exposure PCA assembly RM1-5705-000CN 1

  • 21 Fusing (fixing) drive assembly (simplex) RM1-8169-000CN 1

  • 21 Fusing (fixing) drive assembly (duplex) RM1-8134-000CN 1

  • 22A Fusing (fixing) motor assembly (M2) RM1-4983-000CN 1

  • 23 Duplexing drive assembly RM1-4973-000CN 1

  • 25 Stepping motor, DC (developing disengagement; M10) RK2-2415-000CN 1

 

8. HP M551 Cassette printer parts diagram

8. HP M551 Cassette printer parts diagram
8. HP M551 Cassette printer parts diagram

  • 1 Cassette RM1-8125-000CN 1

 

9. HP M551 Paper pickup assembly printer parts diagram

9. HP M551 Paper pickup assembly printer parts diagram
9. HP M551 Paper pickup assembly printer parts diagram

  • 1 Paper pickup assembly (simplex) RM1-8168-000CN 1

  • 1 Paper pickup assembly (duplex) RM1-8124-000CN 1

  • 3 Photointerrupter WG8-5935-000CN 1

 

10. HP M551 PCA assembly printer parts diagram

10. HP M551 PCA assembly printer parts diagram
10. HP M551 PCA assembly printer parts diagram

  • 1 Lower HVPS-D PCA RM1-8087-000CN 1

  • 2 Upper HVPS-T PCA (simplex) RM1-8089-000CN 1

  • 2 Upper HVPS-T PCA (duplex) RM1-8088-000CN 1

  • 3 DC controller PCA RM1-8104-000CN 1

  • 4 Low-voltage power supply 110V RM1-8091-000CN 1

  • 4 Low-voltage power supply 220V RM1-8093-000CN 1

  • 5 Inner connecting PCA (ICB) RM1-8143-000CN 1

  • Not shown Formatter assembly kit (exchange) CF081-69001 1

  • Not shown Formatter assembly kit (China) CF081-67912 1

 

11. HP M551 1 x 500 sheet paper feeder printer parts diagram

11. HP M551 1 x 500 sheet paper feeder printer parts diagram
11. HP M551 1 x 500 sheet paper feeder printer parts diagram

  • 1 1 x 500-sheet feeder replacement kit CF084-67901 1

 

12. HP M551 Paper feeder covers printer parts diagram

12. HP M551 Paper feeder covers printer parts diagram
12. HP M551 Paper feeder covers printer parts diagram

  • 1 Cover, left RC2-5428-000CN 1

  • 2 Cover, rear RC2-5429-000CN 1

  • 3 Cover, right RC2-5427-000CN 1

  • 4 Cover, front upper RC2-5425-000CN 1

  • 5 Cover, front right RC2-5426-000CN 1

  • 6 Stopper, door RC2-5417-000CN 1

  • 7 Cover, left front RC2-5430-000CN 1

  • 8 Link, door right RC2-5435-000CN 1

  • 9 Right door assembly RM1-6192-000CN 1

 

13. HP M551 Paper feeder main body printer parts diagram

13. HP M551 Paper feeder main body printer parts diagram
13. HP M551 Paper feeder main body printer parts diagram

  • 1 Lifter base assembly RM1-5913-000CN 1

  • 2 Paper feed assembly RM1-6194-030CN 1

  • 4 Paper pickup assembly RM1-5919-000CN 1

  • 5 Paper feed roller assembly CF081-67913 1

  • 6 Roller, paper pickup CF081-67913 1

  • 13 Drawer connector holder VS1-7257-007CN 1

  • 14 Holder, drawer connector RC2-5416-000CN 1

  • A04 Screw, tapping, pan head M4X10 XB4-7401-007CN 1

 

14. HP M551 Paper Cassette printer parts diagram

14. HP M551 Paper Cassette printer parts diagram
14. HP M551 Paper Cassette printer parts diagram

  • 1 Cassette assembly (Tray 3) RM1-6198-000CN 1

 

15. HP M551 Paper Feeder PCA printer parts diagram

15. HP M551 Paper Feeder PCA printer parts diagram
15. HP M551 Paper Feeder PCA printer parts diagram

  • 1 PCA, paper feeder driver RM1-5839-000CN 1

 

Other Helpful HP LaserJet Printer Support Resources

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