How many laser units are used in the In-line technology of the HP LaserJet Enterprise 500 color M551 printer?

Question

Options

• A1
• B2
• C3
• D4

• A
  5% (2)
• B
  91% (40)
• C
  2% (1)
• D
  2% (1)

Explanation

Option B (2 laser units) is correct because the HP LaserJet Enterprise 500 color M551's In-line technology uses one laser unit dedicated to black toner and a second laser unit shared across the three color toners (cyan, magenta, yellow). Option A (1) is wrong because a single laser cannot efficiently drive the separate imaging drums in a color in-line engine. Options C (3) and D (4) are wrong - 4 lasers would describe a fully separate-laser-per-color architecture (one per CMYK cartridge), which is a different, higher-end design, and 3 has no basis in this printer's architecture.

Memory tip: Think "In-line = 2 lasers" - one for black, one for the three colors. The word "In-line" hints at sharing: the C, M, Y drums share a single laser scanning unit inline with a dedicated black laser.

No community discussion yet for this question.