41955801TH Rev.8 107 /Oki Data CONFIDENTIAL5. TROUBLESHOOTING PROCEDURES5.1 Precautions before troubleshooting(1) Confirm the basic inspection items described in the user manual.(2) Obtain as much information regarding the problem from the user as possible.(3) Check the printer in a condition close to that upon generating the problem.5.2 Precautions before handling an abnormal image(1) Confirm that the environment for using this printer is appropriate.(2) Confirm that consumables (toner, drum cartridge) are replaced appropriately.(3) Confirm that paper is accurate. Refer to paper specifications.(4) Confirm that the drum cartridge is set appropriately.5.3 Precautions upon handling an abnormal image(1) Do not touch or allow foreign objects to contact the OPC drum surface.(2) Do not expose the OPC drum to direct sunlight.(3) Do not touch the fuser unit as it is heated significantly.(4) Do not expose the image drum to light for longer than five minutes in room temperature.