Maintenance & TroubleshootingWorkCentre Pro 412Launch Issue7-13August 20017-5 Print QualityError Status Check SolutionVertical black lineand band.1. Bad blade in toner cartridge.2. LSU.1. Install a new toner cartridge.2. Install a new LSU.Vertical whiteline.1. LSU window contamination.2. Toner cartridge.1. Clean LSU window.2. If not LSU contamination,install a new toner cartridge.No image. 1. Has the seal tape beenremoved?2. Is the GND OPC wellgrounded?3. LSU running well?4. Is the bias voltage normal?5. Low toner?6. Is there video data from MainPBA1. Remove the seal tape.2. Measure the resistancebetween. frame ground andthe ground spring attached tothe frame. If necessary cleanthe components to achieve agood earth.3. Adjust LSU or install a newLSI.4. Normal Dev bias = -350V.5. If necessary install a newtoner cartridge.6. Test engine test pattern, ifnecessary, install a new MainPBALight image. 1. Has the seal tape beenremoved?2. LSU light power normal?3. Enough toner?4. High charger voltage?5. Lower bias voltage6. Contamination of high voltagecontact7. Transfer voltage and roller.1. Remove the seal tape2. LSU light power check is diffi-cult.Compare with new one andcheck.3. Check toner and developercounter4 and 5. Check all high voltageoutputs6. Leakage of toner cause badcontacts and increases con-tact resistance. Clean the con-taminated area.Dark image. 1. LSU light power normal?2. Bias voltage output is high?3. Video data is always supplied?1. Check the rated level andreplace.2. Set to correct voltage.3. Replace defected board.
