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HP LaserJet 8100dn Printer - Page 5 Questions & Answers
51.23
optical unit is defective: Reconnect the connectors of the laser driver pca (j501) and the dc controller pca (j108, j109). If the problem is not solved replace the product. Per the service manual
Hp laserjet 3200
take printer outside of building
pull out toner cartridge and drum carerfully
Spray inside of printer to get rid of split extra toner with a can of compressed air - usually available from an electronic supply shops
Check the drum has no tone split on it .
Put drum and toner cartridge back into the printer
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