Printer Operation and Maintenance Honor

Vocational Activities

Requirements

1. Name the creators of the first printer and the photocopier, the reasons that led them to invent it, and how its use began.

   Answer: Modern printing began with Johannes Gutenberg, who created the movable-type press around 1450, making it possible to print books at scale (before, everything was copied by hand). The photocopier was invented by Chester Carlson in 1938 (the xerography process), seeking a fast way to copy documents — the basis of Xerox copiers, which became popular from the 1950s-60s. — Gutenberg (the press, ~1450) and Chester Carlson (the photocopy, 1938) revolutionized the way texts and documents are reproduced.

2. Explain the operation, the ink supply and the price of each type of printer below:
   • Impact printer
   • Inkjet printer
   • Laser printer
   • Thermal printer
   • Solvent printer
   • Plotter printer
   • Thermal wax printers
   • Dye-sublimation printers
   • Solid ink printers
   • Sublimation printer
   • PVC card printer

   Answer: 1) Impact printer (dot matrix): pins strike against an inked ribbon that marks the paper; fed by an ink ribbon; it is cheap, but noisy and of low quality. 2) Inkjet printer: it sprays tiny droplets of liquid ink onto the paper; fed by ink cartridges (or a bulk/tank system); the equipment is cheap and good for photos. 3) Laser printer: a laser beam forms the image and the toner (powder) is fused onto the paper by heat; fed by a toner cartridge; it is fast and economical at high volume, great for text, but the device costs more. 4) Thermal printer: uses heat on special heat-sensitive paper, with no ink or toner (receipts, labels); fed only by the special paper; cheap and quiet. 5) Solvent printer: uses solvent-based inks, resistant to water and sun, for large formats (banners, tarpaulins, stickers); fed by rolls/jugs of solvent ink; expensive, for professional use. 6) Plotter printer: prints in large formats (blueprints, banners, projects) by inkjet or solvent ink; fed by large cartridges/jugs; high price, for professional use. 7) Thermal wax printer: melts sticks/ribbons of colored wax by heat, transferring it to the paper; fed by wax ribbons; vivid colors, mid- to high-priced equipment. 8) Dye-sublimation printer: heats dyes that turn into gas and penetrate the material, producing continuous-tone quality photos; fed by dye ribbons; mid- to high-priced. 9) Solid ink printer: uses blocks of solid ink (like wax) that are melted and applied; fed by sticks of solid ink; intense colors, medium operating cost. 10) Sublimation printer: transfers the image by heat from special paper onto fabrics, mugs and gifts; fed by sublimation ink and transfer paper; mid-priced, widely used in personalization. 11) PVC card printer: prints directly onto plastic cards (badges, ID cards, access cards); fed by its own print ribbon; specialized and more expensive equipment. In general, inkjet is the cheapest, while laser, plotters and professional sublimation/card printers are the most expensive. — Each type has its own technology and cost — inkjet for home, laser for volume, plotter/sublimation for special uses.

3. What are the proper precautions we should take when handling toner and an ordinary ink cartridge?

   Answer: Handle them without touching the electrical contacts or the cylinders; do not shake or puncture them; store them in a dry, ventilated place, away from sun and heat; when replacing, avoid inhaling the toner dust (a ventilated area and, if possible, a mask) and wash your hands; clean toner spills with a dry cloth (hot water spreads it); and dispose of empty cartridges at recycling points. — Toner and ink require care in handling — avoid contact with the skin and the contacts, and dispose of them by recycling.

4. Demonstrate how to refill the cartridge of an inkjet printer.
5. List at least 5 of the causes that prevent printing and what to do to solve each of them.

   Answer: • Out of ink/toner -> replenish or replace the cartridge. • Paper jam -> carefully remove the paper. • Out of paper -> refill the tray. • No connection or driver problem -> check the cable/Wi-Fi and reinstall the driver. • Print queue stuck -> cancel the documents and restart the printer. • (Inkjet) clogged nozzles -> run the print head cleaning through the software. — Most printing problems are simple: ink, paper, connection or a stuck queue — knowing how to diagnose solves them quickly.

6. Describe the type of paper and printers suitable for the types of prints below:
   • Photo
   • Ordinary document
   • Transparency

   Answer: 1) Photo: use photo paper (glossy or matte), made for images, in a quality inkjet printer or a sublimation printer, ensuring true colors and good sharpness. 2) Ordinary document: use ordinary bond paper (75 g/m²) in a laser printer, which gives sharp text and is economical at volume; inkjet also works for home use. 3) Transparency: use a transparency sheet made for the type of printer — there is a specific transparency for laser and another for inkjet; the wrong sheet can melt in a laser printer or smudge in an inkjet. — Each print calls for the right paper: photo paper for photos, bond paper for documents and specific transparency for slides.

7. Install and configure a printer on a computer, set it up on a network and in wireless mode.
8. Choose a type of printer, disassemble it, clean it and reassemble it, explaining how the cleaning method is done.

   Answer: Cleaning the printer while it is off, dry and carefully on the print heads and rollers, maintains quality and prevents jams.

9. Know how to superficially disassemble a printer for cleaning and maintenance.

   Answer: Unplug it from power, open the covers and access trays, carefully remove the cartridges or toner, clean the dust and residue with a soft brush, compressed air and a dry cloth, without disassembling delicate internal parts or touching the sensors and print heads. Then put everything back and test it. — Surface cleaning is safe: open it, remove the dust and residue carefully, without touching the delicate internal parts.

10. Make a project or some kind of advertisement about the conscious use and recycling of paper and printer cartridges.
11. Research and attach at least 5 photos of old printers.
12. Intern or work at a printer technical-service shop for at least 15 days.