DP120F/DP125F Troubleshooting 11-64 March 2000 © TOSHIBA TEC4.3.9 “DEVICE ERROR 22 to 25”4.3.8 “DEVICE ERROR 21”Check pointsAre the terminals contacting between theLSU and top of the Drum unit dirty or de-formed.Is the cable firmly connected to the MotherPBA (CN12), between the Mother PBA(CN24) and the Main PBA (CN12)?When no problem is found in steps above,the Drum unit itself, the Main PBA or theMother PBA may be defective.SolutionsIf dirty, clean them. If deformed, replacethe LSU.Insert the cable to the connector firmly.Replace in the order of: Drum unit, MainPBA, Mother PBA.Step1234.3.7 “CONFIRM DEV. UNIT”Check pointsAre the terminals contacting between theLSU and top of the Drum unit (dischargelamp contacts.)Is the cable firmly connected to the MotherPBA (CN12), between the Mother PBA(CN24) and the Main PBA (CN12)?When no problem is found in steps above,the Drum unit itself or Main PBA be de-fective.SolutionsIf dirty, clean them. If deformed, replacethe LSU.Insert the cable to the connector firmly.Replace in the order of: Drum unit, MainPBA, Mother PBA.Step123Check pointsIs the cable from the Fuser firmly con-nected to the LVPS (CN3), between theMother PBA (CN24) and the Main PBA(CN12)?Is the cable from the Fuser firmly con-nected to the Mother PBA (CN4), betweenthe Mother PBA (CN25) and the Main PBA(CN13)?When no problem is found in the stepsabove, the Fuser itself, the LVPS, or thePBA's may be defective.SolutionsInsert the cable firmly.Insert the cable firmly.Replace in the order of: Fuser, LVPS, MainPBA, Mother PBA.Step123
