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A+ Core 1 · CompTIA 220-1201 V15 · Objective 3.7

Given a scenario, perform appropriate printer maintenance

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Objective 3.7: Given a scenario, perform appropriate printer maintenance

Cert: CompTIA A+ Core 1 (220-1201) V15 Domain: 3.0 Hardware Weight: ~25% of Core 1 (domain total) Depth: Given a scenario, perform appropriate. The candidate must match maintenance tasks to specific printer types.

What this objective tests

You should be able to recognize four common printer technologies (laser, inkjet, thermal, impact) and perform the maintenance each one requires. Each technology has its own consumables, its own typical failures, and its own standard care procedure.

Key facts

Laser printers:

  • Use a toner cartridge (powdered pigment), a drum, a fuser, and a transfer mechanism. Heat fuses toner to paper.
  • Replace toner. When pages get faint or the printer reports low toner. Remove the old cartridge, gently rock the new one to distribute toner, install, run a test page.
  • Apply maintenance kit. After a high page count (often 100,000-200,000 pages depending on model). The kit replaces the fuser, rollers, and transfer components. Required for sustained print quality and to prevent jams.
  • Calibrate. Aligns color planes and density. Run after toner or drum replacement, or when colors look off.
  • Clean. Remove paper dust, toner residue, and debris from rollers and paper paths. Use a lint-free cloth and approved solvents where the manual specifies.
  • Safety: laser printer fusers run hot. Let them cool before maintenance.

Inkjet printers:

  • Spray liquid ink through fine printheads onto paper.
  • Ink cartridge. Replace when ink runs out. Some printers use separate cartridges per color, others use combined.
  • Printhead. May be integrated into the cartridge (HP, Canon often) or fixed in the printer (Epson, some Canon). Fixed printheads need periodic cleaning cycles.
  • Roller. Pulls paper through the printer. Can pick up dust and ink overspray.
  • Feeder. The mechanism that picks up sheets from the input tray.
  • Clean printheads. Run the printer's built-in head clean cycle when print quality drops (banding, missing colors). Multiple cycles may be needed for a long-idle printer. Heavy use of head cleaning consumes a lot of ink.
  • Replace cartridges. When low or empty. Inkjet cartridges that sit unused for weeks may dry out.
  • Calibrate. Align printheads after replacement or when text looks fuzzy.
  • Clear jams. Open the access panel, remove paper carefully without tearing. Always pull paper in the direction of normal feed.

Thermal printers:

  • Use heat to darken specially-coated thermal paper. No ink, no toner. Found at retail registers, shipping labels, and small kiosks.
  • Feed assembly. Pulls paper from the roll past the heating element.
  • Special thermal paper. Coated paper that darkens when heated. Required: regular paper will not print.
  • Replace paper. Load a fresh roll. Pay attention to which side faces the heating element (the coated side).
  • Clean heating element. Use a thermal printhead cleaning swab or alcohol-soaked lint-free wipe. Residue from paper dust degrades print quality.
  • Remove debris. Paper dust accumulates inside the printer. Vacuum out periodically.

Impact printers:

  • Use a print head with pins that strike a ribbon, transferring ink onto paper. Loud, slow, but capable of producing multi-part carbon-copy forms.
  • Still used in industrial, automotive (parts orders), shipping (waybills), and some banks.
  • Multipart paper. Carbon-paper-style forms that require physical impact to print through multiple copies at once.
  • Replace ribbon. When prints get faint. The ribbon is the equivalent of toner: it carries the ink.
  • Replace printhead. Pins wear out over time. Worn pins produce missing dots in printed characters.
  • Replace paper. Continuous-feed tractor paper or single-sheet. Different mechanisms for each.

Common gotchas

  • Refilled or third-party laser toner. Sometimes lower quality, can void warranties, can leak toner inside the printer. Confirm the customer is comfortable with the risk.
  • Inkjet head clogging from disuse. Inkjets need to print regularly or the heads dry out. Recommend a test print weekly if the printer sits idle.
  • Thermal paper exposed to heat or sunlight. Receipts on car dashboards go blank. Thermal paper is heat-sensitive. Store in cool, dark conditions.
  • Multi-part forms in a laser printer. Laser fusers will damage carbon-paper forms; impact printers are the only correct device for these.
  • Maintenance kit timing. Skipping a maintenance kit when the printer says it is due usually leads to a cascade of jams and quality issues within weeks.
  • Forgetting to remove all packing material. New laser printers ship with foam or tape inside protecting the drum. Failing to remove it before powering on can crack the drum or jam the mechanism.
  • Wrong cleaning solvent. Some printer parts require isopropyl alcohol only. Others require water. Some require nothing but a dry lint-free cloth. Always check the manual before applying any solvent.

Real-world context

For a typical small business:

  • Laser MFDs are the workhorses. Stock toner cartridges in inventory. Schedule maintenance kits based on page counters in the printer's web interface.
  • Inkjets are common for color graphics or photo work but problematic for offices where they sit idle (heads dry out). Recommend laser for general office use whenever possible.
  • Thermal printers appear at retail or shipping labels. Stock thermal paper and cleaning swabs.
  • Impact printers are niche. If a client has one, they have it for a real reason (multi-part forms). Stock ribbons and a backup printhead.

The most common maintenance-related calls:

  • "Pages are coming out faded." Low toner or ink, dirty printhead, or worn drum/maintenance kit.
  • "Pages are streaked or have lines." Dirty drum, worn fuser, or clogged inkjet head.
  • "The printer keeps jamming." Worn rollers (laser, time for maintenance kit), warped paper, or paper from the wrong tray.
  • "The receipts are blank." Bad thermal roll loaded with the coated side wrong, or the heating element is dirty.

Sources

  • [CompTIA A+ 220-1201 Exam Objectives Version 4.0, Section 3.8](../../../../../../30-RevyTechJourney/CompTIA%20A%2B%20220-1201%20Exam%20Objectives%20%284.0%29.pdf)
  • [Wikipedia: Laser printing](https://en.wikipedia.org/wiki/Laser_printing)
  • [Wikipedia: Inkjet printing](https://en.wikipedia.org/wiki/Inkjet_printing)
  • [Wikipedia: Thermal printer](https://en.wikipedia.org/wiki/Thermal_printer)
  • [Wikipedia: Dot matrix printer](https://en.wikipedia.org/wiki/Dot_matrix_printer)