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Zorluk: OrtaPrinter and Multifunction Device Issues

A technician is troubleshooting a network-connected multifunction device (MFD) in an office. Users report that when copying multi-page documents using the Automatic Document Feeder (ADF), a vertical black line appears down the entire length of every page. However, when users send print jobs to the same MFD directly from their computers over the network, the printed pages are clean and clear with no lines. Which of the following components is most likely dirty or damaged?

  1. The ADF scanner glass stripCevap
  2. B
    The photosensitive drum cleaning blade
  3. C
    The fuser assembly pressure roller
  4. D
    The print spooler driver on the network print server

Cevap

The ADF scanner glass strip
When a vertical line appears exclusively on copies made using an ADF, but does not appear on jobs printed directly from a computer, the issue is isolated to the scanner mechanism. On multifunction devices, the ADF feeds paper past a stationary optical scanner located under a small glass strip adjacent to the main flatbed glass. Debris on this narrow glass strip causes a continuous streak along the entire length of the scanned page.

Adım Adım Çözüm

1
Isolate the symptom between the print engine and the optical scanning assembly
Network print jobs produce clean output while ADF copy jobs display a vertical line, confirming the print engine (drum, fuser, laser unit) is functioning correctly and the fault lies entirely within the ADF optical scanning system.
Print jobs bypass the scanner optical glass entirely, whereas copy/scan operations rely on the scanner light assembly.
2
Analyze how document scanning works when using the Automatic Document Feeder (ADF)
During ADF feeding, the scanner optical head remains stationary beneath the narrow slit glass (ADF glass strip) while the paper moves across it. Any smudge, dust, or mark on this narrow strip creates a continuous line down the entire scanned page.
Debris on stationary glass acts as a continuous obstacle to light capture as the paper glides past.
3
Identify the corrective action
Cleaning the narrow ADF glass strip with a lint-free cloth and isopropyl alcohol removes the obstacle and restores scan clarity.
Debris removal resolves optical line artifacts without requiring component replacement.

Anahtar Kavram

MFD Scanner Defect Isolation (ADF Slit Glass vs. Print Engine Components)
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Konular

Printer and Multifunction Device Issues

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