246 Chapter 9 – Image quality EN
Image defect details
• The media does not meet HP specifications.
• The toner cartridge is defective.
• The inside of the printer is dirty.
• The transfer roller is dirty or worn.
• The pickup roller is dirty.
• Generate a cleaning page.
• The toner cartridge was improperly installed.
• The primary charging roller is defective.
• The laser/scanner assembly is faulty (turning laser on continuously).
– The connectors between the laser/scanner unit and the ECU or
DC controller PCA are not seated properly or are defective.
Reseat the controller unit or PCA.
– The high-voltage power supply connections are dirty. Clean the
connections.
• The high-voltage power supply is installed improperly. If the high-
voltage power supply has been removed and replaced, it might not
be seated properly.
– Reseat the high-voltage power supply.
– Check the ECU for damage.
Background scatter
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