Specifications

Chapter 4: Troubleshooting and General Procedures
4-19
The following table lists components that may affect image quality. Please review this list before
returning the printer to Digital:
HVPS or
image
Try another toner cartridge.
If the front door has been opened or if a new toner cartridge is used, run several
prints to see if the image defect disappears.
Unplug the printer and try cleaning the earth plate contacts.
The following symptoms may indicate problems with the following components:
• Faded or light prints transfer charge
• Black prints charge roller bias
• Blank prints dev bias
• Vertical band deletions BTR
• Vertical linear deletions BTR or paper path contamination
• Vertical streaks BTR, fuser or paper path contamination
• Horizontal streaks
or band deletions BTR, fuser, or drive gears
• Spots or spot deletions BTR, fuser, or paper path contamination
• Residual image BTR, fuser, or paper path contamination or
ghosting (a phenomenon that occurs in
extreme gray tones and diminishes with toner
use)
• Background BTR, fuser, or drive gears
• Unfused image fuser
• Damaged prints take-away roller, inlet chute, toner (EP)
Cartridge or Fuser not seated properly
Printing
accuracy
• Skewed image: Make sure the feeder side guides are tight against the input
stack of paper and check the registration sensor on the inlet chute.
• Same for these other printing accuracy specifications
Lead edge registration
Side edge registration
Skew
Vertical accuracy
Feeding accuracy
Horizontal accuracy
• Damaged prints: Make sure the BTR, turn roller, or inlet chute has not
popped out of its bearings.
Fan There is no control panel message for this item.
This is a 24V fan driven by the MCU.
If the fan doesn’t move, RTD.
ROS The problem may be a defective LD/CRU switch or toner (EP) cartridge. Power
up without a toner (EP) Cartridge; then power up again with a new cartridge.
A possible symptom is a wavy image.
Try the engine self test.
Fuser If the control panel message = Failure: 910 Engine Ctrl PCB,
suspect the fuser, not the MCU or NVRAM.
Look for the fuser lamp to light or warm up.
Try reseating the fuser.
Try the engine self test.
Symptoms can be and unfused image, extreme heat, or image background