58This chapter describes how to replace the TD cartridge and drum cartridge, and howto clean the unit.TD CARTRIDGE REPLACEMENTThe TD cartridge replacement required ( ) indicator will light up when toner isneeded. For more information on purchasing the TD cartridge, see "ABOUTSUPPLIES AND INTERFACE CABLES" (p.71). If copying is continued while theindicator is lit, copies will gradually become lighter until the unit stops and theindicator begins blinking. Replace the old TD cartridge by following the procedurebelow.1 Open the side cover and front cover, in that order.To open the side cover and front cover, see "INSTALLING THE TDCARTRIDGE" (p.10).2 Gently pull the TD cartridge outwhile pressing the lock releasebutton.3 Install a new TD cartridge. To install the new cartridge, see"INSTALLING THE TD CARTRIDGE" (p.10).Be sure to use only genuine Olivetti parts and supplies.• After the unit stops, it may be possible to make a few more copies bytaking the TD cartridge out of the unit, shaking it horizontally, thenreinstalling it. If copying is not possible after this operation, replace theTD cartridge.• During long copy run of a dark original, the start ( ) indicator mayblink, the indicator light up, and the unit stop, even though toner is left.The unit will feed toner up to 2 minutes and then the start ( )indicator will light up. Press the start ( ) key to restart copying.Dispose of the old TD cartridge in accordance with local regulations.Lock release button7 MAINTENANCE