Refurbished HP LaserJet IIIsi Mono Laser Printer

Product Specifications & Hardware Details

• Brand: HP
• MPN: 33491A
• Model: LaserJet IIIsi
• Type: Vintage High-Volume Monochrome Laser Network Printer
• Standard Functions: High-Speed Departmental Printing, PCL 5 Language Processing, Resolution Enhancement technology (REt), Dual 500-Sheet Input Bins.
• Optional Functions: Automatic Duplex Printing, HP JetDirect Ethernet Expansion Cards, Onboard Adobe PostScript Emulation, 2,000-Sheet Output Stacker.
• What's Included in the Box: HP LaserJet IIIsi Departmental Printer, Two Internal 500-Sheet Paper Drawers, Pre-installed Microfine Toner Cartridge, Software Utilities Diskette Layouts, User Reference Manual, and Heavy-Duty Power Cord.
• Required Items (Sold Separately): Replacement HP 91A Black Original Toner Cartridges, Centronics Parallel Interface Cable, or JetDirect Modular Network Server Cards.

Technical Specifications

Available Options & Consumables

We stock an authentic array of official components, expansion modules, and consumable accessories for the legendary HP LaserJet IIIsi. You can add these to your order directly from the accessories tab below:

• Hardware & Network Upgrades: HP JetDirect Network Interface Cards (Ethernet/LocalTalk configurations) and Internal Automatic Duplex Printing Upgrade Board
• Toner Refills: HP 91A Black Microfine Toner Cartridge (92291A)
• Media Management: HP 1,500-sheet High-capacity Input Tray Expansion and Automated Envelope Feeder Box Module

Frequently Asked Questions (FAQ)

• What does the "si" suffix represent historically on this LaserJet platform?
  The "si" designation highlights this model as a "Shared Interface" workstation, famously serving as HP's pioneering, mass-market enterprise desktop network laser printer built for multi-user workgroups.
• Does this legacy engine support printing graphics and fonts smoothly?
  Yes. This system relies on scaled internal type fonts powered by the PCL 5 printer language coupled with built-in Microfine toner and REt engineering to ensure smooth graphic borders.
• What style of connection framework is required for host data streaming?
  This historical infrastructure unit relies on standard Centronics Parallel or RS-232C Serial ports unless equipped with an active internal JetDirect expansion network adapter card slot.