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Diagnostic Aids 2-1
4510-001
2. Diagnostic Aids
Print Quality
Vertical Black Line and Band
Description:
1. Straight thin black vertical line
2. Dark black vertical bands
Possible causes:
• Toner cartridge failure
• Foreign material between transfer/
charge/development rollers
• Deformed transfer roller
Vertical White Line
Description: White vertical voids
Possible causes:
• Toner cartridge failure
• Printhead failure
• Fuser failure
Horizontal Black Band
Description: Dark or blurry horizontal stripes
Possible causes:
• Toner cartridge failure
• Bad or dirty voltage contacts