4. Troubleshooting4.6.5. Foggy ImageA. Typical faulty imagesB. Troubleshooting procedureStep Cause Action1 Voltage of OPC is abnormally low. Replace Drum unit.(Refer to 3.3.2.1.)2 HVPS operates abnormally.• HVPS is damaged or broken.Replace HVPS board.(Refer to 3.3.3.)3 Toner is over supplied.• TC-sensor operates abnormally.Replace Toner cartridge.(Refer to 3.2.2.2.)4 Voltage of OPC is abnormally low.• T1 Voltage is abnormally high.Check the T1 connection in HVPS.Check if T1–roller spring in ITB is connected correctly.Replace HVPS board.(Refer to 3.3.3.)Copyright© 1995-2013 SAMSUNG. All rights reserved. 4-212