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| General Info | HP LaserJet 4000 | HP LaserJet 4050 |
| Model Number | C4118A | C4251A |
| Release Date | Nov 97 | May 99 |
| Max Speed | 17 ppm | 17 ppm |
| Max DPI | 1200 | 1200 |
| Memory Min/Max | 4MB/100MB | 8MB/200MB (4050) |
| 16MB/200MB (4050n/tn) | ||
| Duty Cycle | 65,000 pgs/month | 65,000 pgs/month |
| Recommended Maint. Interval | 200,000 pgs | 200,000 pgs |
| Common Parts HP LaserJet 4000/4050 | ||
| Fuser, 110v | RG5-2661 | |
| Maintenance Kit, 110v | C4118-67909 | |
| Feed/Separation Roller | RF5-1885/RF5-3114 (qty 2/tray) | |
| Tray 1 Pickup Roller | RG5-3718/RG9-1529 | |
| Tray 2 & 3 Pickup Roller | RB1-8865/RB1-8957 | |
| Tray 2 Pick Up Drive Asm | RG5-2672 (500-sheet tray) | |
| Pickup Asm | RG5-2655 (tray 1) | |
| Pickup Roller Shaft with rollers | RF5-2484 | |
| Pickup Coupler (dog bone) | RB1-8877, RG5-2672 (500-sheet tray) | |
| Delivery Asm | RG5-2648 | |
| Separation Pad | RG5-5281/RF5-3086 | |
| Transfer Roller | RG5-4283 | |
| Engine Controller, 110v | RG5-3693 | |
| Fixing Film Sleeve | SLEEVE 4000 | |
| Lower Pickup Drive Asm | RG5-2684 (250-sheet âTâ version) | |
| Upper Pickup Drive Asm | RG5-2683 (250-sheet âTâ version) | |
| 500 Sheet Tray | C4125A | |
| Toner Cartridge | C4127X | |
| Model Name/Model Number |
| HP LaserJet 4050 (HP C4251A) |
| HP LaserJet 4050N (HP C4253A) |
| HP LaserJet 4050T (HP C4252A) |
| HP LaserJet 4050TN (HP C4254A) |