01/026-258825/8830 Printer Loud Noise From HVPS, Troubleshooting Photore-General ProceduresLoud Noise From HVPSPROBLEMLoud noise or squeal coming from the High Voltage Power Supply.CAUSEPoor connection between the High Voltage Power Supply and the Charge Scorotron.SOLUTIONCheck the Charge Scorotron leads for an open or poor connection. If damaged repair orreplace the Charge Leads (part of the Charge Scorotron Endblock Kit)REQUIREMENTS FOR FIELD RESOLUTION• DOCUMENTATIONN/A• TAG N/A• PART NUMBERS600K58730 Scorotron Endblock Kit• CUT IN SERIAL NUMBERN/ATroubleshooting Photoreceptor Drive ProblemsPROBLEMPhotoreceptor drive may stall causing blank printsCAUSEThere is more than one cause of this problem, other than hard failure. Check the items listedbelow before troubleshooting the circuit or replacing components:SOLUTIONNOTE: The photoreceptor drive circuit has an overcurrent protection built into it. If the circuitdetects no drum drive or high current the drive system will shut down. When this occurs,the printer must be powered off then on to reset the circuit.1. A poorly lubricated cleaning blade and photoreceptor can cause photoreceptor stalls orsquealing. Use the double buff procedure when servicing the cleaning components.NOTE: Excessive zinc stearate can cause print quality problems but the photoreceptor willrecover back to normal performance.2. Ensure that the screws that hold the scorotron in place are fully seated . If they are notthey can touch the ends of the photoreceptor and stall it.3. Ensure that the plastic “skis” that are located on the top of the turn baffle do not contactthe photoreceptor. To check this remove the developer housing and place a piece ofpaper between the “skis” and the photoreceptor. The paper should pass freely betweenthem. If it does not perform the transport adjustment.4. Ensure that the Photoreceptor drive coupling is securely fastened to the motor and driveshaft. Rotate the shaft, if the coupling appears to “wobble” replace it.REQUIREMENTS FOR FIELD RESOLUTION• DOCUMENTATIONN/A• TAG N/A• PART NUMBERSN/A• CUT IN SERIAL NUMBERN/A
