Справочник Пользователя для HP color laserjet 4500

172 Chapter 9 Image quality

 EN

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The toner cartridge is defective.

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The toner cartridge is not seated properly.

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The fusing assembly is contaminated or damaged.

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The static eliminator teeth are contaminated or defective

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The imaging drum is damaged or the waste toner collection in the 
drum is full. Replace the imaging drum.

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Check for poor contact between the drum cartridge contact (for 
primary charging bias) and the primary charging bias contact. To 
improve the contact, clean the contacts. If the problem persists after 
cleaning or the contacts are deformed or damaged, replace them. If 
the contacts have slipped off, adjust them correctly.

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Check the drum cartridge (primary charging roller). If defective, 
replace the drum cartridge.

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Check for poor contacts in the connectors. Reconnect the DC 
controller PCB connector and the high-voltage PCB 2 connector 
correctly.

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Check for a defective high-voltage PCB (primary charging bias 
output shortage). If defective, replace the high-voltage PCB 2.

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Check for a defective DC controller PCB. If defective, replace the 
DC controller PCB.

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If ITB clutch was removed, check for proper timing.

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The black toner cartridge is empty.

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Make sure clutch CL2 is connected (plugged into the paper PCA).

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This defect can be caused by improper timing on the ITB clutch 
gears. Make sure that the cams are in sync. The two white gears on 
the left side of the printer should have two timing marks pointing 
toward each other.
– Cams with a single line should be off one tooth clockwise on the 

right gear.

– Cams with a double line should be aligned.