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Question

Difficulty: MediumPrinter and Multifunction Device Issues

A technician is troubleshooting an impact dot-matrix printer used in a warehouse to print multi-part continuous shipping forms. The printer is running, but text on the carbon copy pages is faint and barely legible. Place the troubleshooting and corrective steps in the logical order they should be performed according to standard methodology.

  1. 1Perform a visual check of the printer ribbon to ensure it is correctly aligned, tensioned, and not dried out.
  2. 2Adjust the printhead platen gap lever to match the specific thickness of the multi-part form.
  3. 3Print a local self-test page directly from the printer's built-in control panel.
  4. 4Replace the printhead assembly if individual pins fail to impact during the hardware self-test.

Answer

The proper sequence begins with inspecting the ribbon consumable, followed by adjusting the mechanical platen gap for paper thickness, running a local hardware self-test page, and lastly replacing the printhead assembly if hardware fault is confirmed.
Standard CompTIA troubleshooting dictates beginning with simple physical checks (inspecting ribbon tension and condition), moving to mechanical adjustments specific to the media (setting the platen gap lever), performing standalone hardware tests (printing a self-test page), and executing component replacement (replacing the printhead) only after isolating a physical defect.

Step-by-Step Solution

1
Inspect the ink ribbon cassette for proper installation, proper ribbon tension, and excessive wear or dryness.
Confirms whether the ribbon is properly delivering ink to the paper surface upon pin impact.
Always check simple physical consumables first before modifying mechanical settings or replacing parts.
2
Adjust the printhead platen gap lever setting based on the thickness of the multi-part forms.
Positions the printhead at the correct distance to allow full pin impact force through carbon duplicate layers.
An incorrect platen gap setting prevents pins from exerting enough force on thicker multi-part paper.
3
Execute a built-in hardware self-test page from the printer control panel.
Determines if the physical mechanical components print correctly independent of computer drivers or print queues.
Isolates hardware print defects from host system driver configuration errors.
4
Replace the printhead assembly.
Restores pin matrix striking mechanism if specific pins are bent or broken.
Major hardware component replacement is performed only after isolating the fault to a broken internal assembly.

Key Concept

Impact Dot-Matrix Troubleshooting Methodology
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Topics

Printer and Multifunction Device Issues

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