A network administrator escalates a ticket regarding a workstation laser printer producing… — CompTIA A+ (Core 1 & Core 2)

A network administrator escalates a ticket regarding a workstation laser printer producing output with recurring dark horizontal smudges spaced exactly $2.5\text{ inches}$ apart on every printed page. A technician measures the circumference of internal printer rollers and determines that a $0.8\text{ inch}$ diameter roller responsible for conditioning the drum prior to laser exposure is failing to uniformly distribute voltage. Which of the following maintenance procedures should the technician perform to eliminate this printing defect?

Replace the primary charge roller (PCR) within the cartridge assembly.Cevap
B
Replace the fuser assembly heat roller and lamp.
C
Clean the transfer roller using high-purity isopropyl alcohol.
D
Recalibrate the intensity settings of the laser scanning unit assembly.

Cevap

Replace the primary charge roller (PCR) within the cartridge assembly.

Repetitive defect troubleshooting in laser printing uses roller circumference math (

C = \pi \cdot d

). A roller diameter of

0.8\text{ inches}

yields a circumference of approximately

2.51\text{ inches}

. Because the component is responsible for pre-conditioning the drum prior to exposure, it corresponds directly to the Primary Charge Roller (PCR). Replacing the PCR resolves the improper electrostatic charging.

Adım Adım Çözüm

Calculate the circumference of the defective component using the formula

C = \pi \cdot d

C = \pi \cdot 0.8\text{ in} \approx 2.51\text{ inches}

, which matches the exact defect repeat interval of

2.5\text{ inches}

Repetitive print defects on laser prints occur at intervals equal to the circumference of the specific roller causing the defect.

Identify the functional EP printing stage associated with conditioning the photosensitive drum prior to laser writing.

The Conditioning stage uses the primary charge roller (PCR) to apply a uniform high negative voltage (approx.

-600\text{V}

) to the drum surface.

Failure of the PCR to uniformly charge the drum causes unintended toner attraction in uncharged areas, manifesting as dark horizontal lines on the output.

Select the appropriate replacement consumable or maintenance part.

Replacing the PCR (often integrated into the toner cartridge or drum unit) restores uniform negative electrostatic charging across the drum surface.

Physical replacement eliminates the damaged surface coating causing the repetitive voltage drop.

Anahtar Kavram

Electrophotographic (EP) Print Process Component Defects and Circumference Calculation

Tahmini Süre:2m 0s

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