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Difficulty: Very hardPrinter Technologies and Consumables Maintenance

A system technician is conducting scheduled preventive maintenance on two specialized network printers. The first unit is a high-volume electrophotographic (EP) laser printer displaying ghost images of previous print jobs down each page. The second unit is a thermal transfer label printer experiencing faint, streaked barcode prints and erratic ribbon movement. Which of the following maintenance actions should the technician perform to resolve these specific hardware issues? (Select TWO.)

  1. Inspect and replace the wiper blade or drum cleaning assembly on the laser printer.Answer
  2. Clean the heating element of the thermal printhead using isopropyl alcohol and a lint-free swab.Answer
  3. C
    Apply high-viscosity silicone lubricant directly onto the thermal ribbon tension rollers.
  4. D
    Increase the laser printer fuser temperature to 260∘C260^\circ\text{C} to melt residual toner during transfer.

Answer

The technician should replace the wiper blade/drum cleaning assembly on the laser printer and clean the thermal printhead heating elements using high-purity isopropyl alcohol and a lint-free swab.
Replacing the wiper blade (or drum unit) addresses ghosting because the cleaning phase of electrophotographic printing requires physical removal of excess toner from the photosensitive drum before exposure. Cleaning the thermal printhead with isopropyl alcohol removes burnt wax/resin buildup from heating elements, restoring uniform heat transfer and crisp output.

Step-by-Step Solution

1
Analyze the laser printer ghosting symptom.
Identified that ghost images stem from incomplete removal of residual toner during the EP cleaning step.
The wiper blade physical wear permits residual charges/toner to cycle back around to the developing and conditioning phases.
2
Determine the appropriate repair for the laser printer.
Replacing the wiper blade or integrated drum unit clears the physical drum surface cleanly.
A worn cleaning blade fails to strip un-transferred toner prior to electrostatic recharging.
3
Analyze the thermal transfer printer symptom.
Recognized that faint/streaked print output is caused by thermal printhead accumulation or residue.
Burnt wax/resin build-up prevents clean heat transfer from the thermal pins to the ribbon.
4
Determine the appropriate maintenance for the thermal printer.
Cleaning the printhead with 99% isopropyl alcohol removes thermal residue without damaging delicate heating elements.
Isopropyl alcohol dissolves wax/resin deposits safely and evaporates cleanly.

Key Concept

Printer Technologies and Maintenance Procedures
Estimated Time:2m 0s
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Topics

Printer Technologies and Consumables Maintenance

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