HP LaserJet 6p/mp Service Manual - Page 128
Image formation troubleshooting, Check the toner cartridge
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Image formation troubleshooting Note Check the toner cartridge Image formation defects are many times the result of toner cartridge problems. If there is any doubt, always replace the toner cartridge before troubleshooting image defects. Use the following check list to ensure that the toner cartridge is still operable. l Ensure that the toner cartridge is seated properly in the cavity. l Inspect the toner cartridge for remaining toner. l Check the expiration date of the toner cartridge (stamped on the cartridge box). l Check the toner cartridge to see if it has been disassembled or refilled. The full weight of the toner cartridge is 26.1 oz (730 grams), and its empty weight is 22.7 oz. (640 grams). l Inspect the cartridge for leaking toner through worn seals. (If the drum has been manually rotated it may have caused internal damage and toner spills may result). l Check the surface of the photosensitive drum in the cartridge to see if it has been damaged or scratched. Touching the drum will contaminate the photosensitive surface and may cause spotting and defects during printing. l Blurred areas on the page may indicate that the drum has been exposed to light for too long. This causes permanent damage to the photosensitive drum. Replace the cartridge. 126 Troubleshooting EN