Dot-matrix printer maintenance: A dot-matrix printer produces patchy, faint, uneven, or intermittent print density. What corrective action typically resolves this symptom first?

Introduction / Context:
Impact printers like dot-matrix models rely on a fabric ribbon impregnated with ink. As the ribbon wears out or dries, output becomes faint, patchy, or inconsistent. Basic maintenance knowledge helps restore print quality quickly without unnecessary mechanical repairs.

Given Data / Assumptions:

• Symptoms: weak or intermittent print density across the page.
• Printer otherwise feeds paper and actuates the print head properly.
• No obvious hardware failure is indicated.

Concept / Approach:

The ribbon is a consumable. Over time, ink depletes and distribution becomes uneven. Replacing the ribbon usually restores consistent darkness. Mechanical adjustments (tractor feed, timing belt) primarily affect paper movement and print head motion timing, not ink deposition density.

Step-by-Step Solution:

Verification / Alternative check:

Most service guides list ribbon replacement as the first remedy for faint output. Users typically observe immediate improvement with a fresh ribbon.

Why Other Options Are Wrong:

• Adjust tractor/paper feed tensions: may correct skew or spacing, not ink density.
• Replace timing belt: addresses carriage motion issues, not fading ink.
• None of the above: incorrect because ribbon replacement directly addresses faint print.

Common Pitfalls:

Reusing very old ribbons, improper threading causing scraping, or ignoring platen gap adjustments for multi-part forms which can influence effective impression but not a truly dry ribbon.

Final Answer:

Replace the ribbon with a new cartridge