HP CM6030 Service Manual - Page 621

Problem Print is light or faded on entire page. Cause Solution Poor contacts exist on the ITB unit and the product grounding unit. Clean the grounding contacts. If the problem remains after cleaning, check the contacts for damage. Replace any deformed or damaged parts. Poor secondary transfer contacts exist on the secondary-transfer roller and the ITB unit. Clean the contacts. If the problem remains after cleaning, check the contacts for damage. Replace any deformed or damaged parts. Print is light or faded in a particular color. Poor primary transfer bias contacts exist on the ITB unit and product. Poor primary charging bias contacts exist with the process cartridge and product. Clean the contacts of the color that produces the light print. If the problem remains after cleaning, check the contacts for damage. Replace any deformed or damaged parts. Poor developing bias contacts exist with the process cartridge and product. Image is too dark. The image-density sensor is defective. Replace the color-misregistration/imagedensity sensor unit. Page is blank. The page is all black or a solid color. White spots appear in an image The back of the page is dirty. The high-voltage power-supply PCA Replace the high-voltage power-supply PCA is defective (no developing bias A. output). Poor primary charging contacts or developing bias contacts exist from the high-voltage power-supply PCA A to the process cartridge. Clean each contact of the color that produces the all black or solid color. If the problem remains after cleaning, check the contacts for damage. Replace any deformed or damaged parts. The static charge eliminator is dirty. Clean the static charge eliminator. The primary-transfer roller is deformed or has deteriorated. Replace the ITB unit. The secondary-transfer roller is deformed or has deteriorated. Replace the secondary-transfer roller unit. The feed roller that makes contact with the back of the media is dirty. Use the repetitive-image-defect ruler to identify the dirty roller. Clean the dirty roller. If the dirt does not come off, replace the roller. The fixing inlet guide or separation Clean the dirty parts. If the dirt does not come guide is dirty. off, replace the guide. The pressure roller is dirty. Execute the cleaning page. If the dirt does not come off, replace the fixing unit. ENWW Solve image quality problems 575