Diagnostic Information 2-37
4022-XXX
Electrical Interference
Something is generating electrical noise that may be interfering with the normal operation
of the printer. The interference generator may be either external or internal to the printer.
If you are using a parallel connection, make sure it is fully shielded and grounded at both
ends.
Step Actions and Questions Yes No
1 EXTERNAL NOISE
Check if there is other electrical equipment, such as electrical
generators, radio transmitters, or devices using electrical
motors, within ten feet of the printer.
Shut off the other electrical equipment or relocate the printer at
least twenty feet away from the other devices.
Is the Electrical Noise problem still present?
Go to step 2 Permanently
relocate either
the printer or
the problem
device.
2 OPTION ISOLATION
If the printer has options installed, such as a Duplex Unit or an
Optional Feeder, remove each option one at a time, and see
how the printer operates without that option installed.
Does the Electrical Noise problem go away when you
remove a specific option?
Replace the
failing option
Go to step 3
3 AC GROUND
Check the AC electrical outlet.
Is the AC wall outlet correctly wired and grounded?
Go to step 4 Repair the AC
wall outlet
Steps 4 through 10 attempt to find a faulty printer FRU that may be generating electrical noise. If replacing
a FRU does not solve the problem, reinstall the old FRU before moving on to the next step.
4 TONER CARTRIDGE REPLACEMENT
Replace the Toner Cartridge.
Is the Electrical Noise problem still present?
Go to step 5 Problem
solved
5 HVPS REPLACEMENT
Replace the HVPS. Go to “HVPS Removal” on page 4-13.
Is the Electrical Noise problem still present?
Go to step 6 Problem
solved
6 LVPS ASSEMBLY REPLACEMENT
Replace the LVPS. Go to “LVPS Removal” on page 4-17.
Is the Electrical Noise problem still present?
Go to step 7 Problem
solved
7 FUSER ASSEMBLY REPLACEMENT
Replace the Fuser Assembly. Go to “HVPS Cover Removal”
on page 4-14.
Is the Electrical Noise problem still present?
Go to step 8 Problem
solved.
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