Specifications

Chapter 4: Troubleshooting and General Procedures
4-8
Review the following checklist before returning the printer to Digital:
Interlock If there is no indication of power, check the plug and wall circuit.
When closing the front cover, does the link assembly appear to work or has it
popped out of the spring lock?
Control Panel If messages are garbled or the control panal is blank, suspect the controller
(ESS), because the controller feeds the messages to the control panel. The
LVPS may also be at fault.
Controller The controller operates the control panel.
Reseat the controller and try the engine self test before assuming the controller
or control panel has failed.
Noise Check the take-away roller, BTR roller, inlet chute, toner cartridge, and Fuser.
These may be ajar and cause noise and defects.
LVPS (+5VDC)
If the 5V circuit is loaded or defective, it would disable almost all
electronics, including the control panel.
Reseat the controller.
(+24VDC)
The 24V circuit controls the fan and ROS.
Drive Try powering up with the toner (EP) cartridge removed.(If the problem goes
away, try another cartridge.
Check the AC plug, wall circuit and LVPS.
Try the engine self test. If the fan still does not move, RTD.
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 LD/CRU switch or toner cartridge may be defective. Try to power up without
a toner cartridge, then try to power up with a new cartridge.
A possible symptom is a wavy image.
Try the engine self test
Fuser If the control panel message is: "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 an unfused image, extreme heat, or image background.