01/02
6-25
8825/8830 Printer
Loud Noise From HVPS, Troubleshooting Photore-
General Procedures
Loud Noise From HVPS
PROBLEM
Loud noise or squeal coming from the High Voltage Power Supply.
CAUSE
Poor connection between the High Voltage Power Supply and the Charge Scorotron.
SOLUTION
Check the Charge Scorotron leads for an open or poor connection. If damaged repair or
replace the Charge Leads (part of the Charge Scorotron Endblock Kit)
REQUIREMENTS FOR FIELD RESOLUTION
• DOCUMENTATION
N/A
• TAG N/A
• PART NUMBERS
600K58730 Scorotron Endblock Kit
• CUT IN SERIAL NUMBER
N/A
Troubleshooting Photoreceptor Drive Problems
PROBLEM
Photoreceptor drive may stall causing blank prints
CAUSE
There is more than one cause of this problem, other than hard failure. Check the items listed
below before troubleshooting the circuit or replacing components:
SOLUTION
NOTE: The photoreceptor drive circuit has an overcurrent protection built into it. If the circuit
detects 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 or
squealing. Use the double buff
procedure when servicing the cleaning components.
NOTE: Excessive zinc stearate can cause print quality problems but the photoreceptor will
recover back to normal performance.
2. Ensure that the screws that hold the scorotron in place are fully seated . If they are not
they 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 contact
the photoreceptor. To check this remove the developer housing and place a piece of
paper between the “skis” and the photoreceptor. The paper should pass freely between
them. If it does not perform the transport adjustment.
4. Ensure that the Photoreceptor drive coupling is securely fastened to the motor and drive
shaft. Rotate the shaft, if the coupling appears to “wobble” replace it.
REQUIREMENTS FOR FIELD RESOLUTION
• DOCUMENTATION
N/A
• TAG N/A
• PART NUMBERS
N/A
• CUT IN SERIAL NUMBER
N/A
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