Toshiba 2460 Service Handbook

Contents

September 1997 © TOSHIBA CORP. 3 - 3 2460 SUPPLIES3.4 Checking and Replacing Cleaning Felt Roller(1) Precautions for HandlingNever allow solvents such as thinner, etc, to adhere to the cleaning felt roller.(2) Poor Heat-Roller Cleaning and CountermeasuresPoor heat-roller cleaning should be judged by the deposited toner on the roller. When the felt rollerhas heavy toner deposits, the heat-roller surface may be stained with toner. If this happens, replacethe cleaning felt roller.The cleaning felt roller will be gradually degraded due to subjection to the heat from the heat rollerover a long period of time; therefore, replace it preferably after about 80,000 copies have been made.3.5 Checking and Cleaning Upper and Lower Heat Rollers(1) Precautions for HandlingA Upper Heat Roller1 Do not leave oil (fingerprints, etc.) on the heat roller.2 Be extremely careful not to allow a hard object to hit on or rub against the roller because thethin Teflon layer coated on the aluminum substrate is easily damaged and, if damaged, willresult in poor drum cleaning.B Lower Pressure Roller1 Do not leave oil (fingerprints, etc.) on the roller surface.(2) Checking1 Check for staining and damage to the heat roller and clean or replace if necessary.2 Clean the separation claws and check for chipped claws.3 Check for cleaning condition of cleaning felt roller.4 Check the thermistor for proper contact with the heat roller.5 Check the fused condition of the toner image.6 Check the heat rollers for proper rotation.(3) Cleaning Procedure for Heat RollersWhen the heat roller becomes dirty, it will cause paper jamming. In that case, wipe the roller surfaceclean with cotton soaked in alcohol or heat-roller cleaner “RC60” which contains silicone oil. For abetter cleaning effect, clean the roller while it is still warm.Notes: 1. Be careful not to rub against the Teflon-coated surface with fingernails or hard objects because itis easily damaged. Do not use silicone oil on the upper heat roller.2. When the heat roller has been replaced, 0 (zero) must be input to clear the power-on time counter(mode “08”, code “402”) and the fuser running counter (mode “08”, code “403”).

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