Diagnostic information 2-25
5022-xxx
84 <color> PC Unit
missing
• Scroll down the operator panel to see if the printer is showing that all four of the PC units
are missing. If so, check the HVPS cable between the system card and the HVPS. Ensure
that the cable is not plugged in backwards on the HVPS. Disconnect and reconnect the
cable to make sure there is good contact.
• Insert or reinstall the specified photoconductor unit and see if problem clears. See
“Photoconductor unit removal” on page 4-70.
• Remove the top access cover assembly (see “Top access cover assembly removal—
model C52x only” on page 4-28 or “Top access cover assembly removal—model
C53x only” on page 4-32), and confirm that the camshaft follower (A) on the left side is
not out of the groove (B). If the camshaft follower is out of the groove, raise the arm, use a
screwdriver to ease the camshaft follower back into the groove. You need to press down
to snap it into position.
• Check the high voltage contacts path, especially the “finger” on the specified
photoconductor unit (printer is shown with components removed for clarity).
• If the contacts are good, replace the HVPS. See “High voltage power supply (HVPS)
removal” on page 4-62.
• If the problem persists, replace the system card. See “System card removal” on
page 4-79.
User status and attendance messages (continued)
Error code Action
AB
High voltage
contact path
High voltage
power supply
Finger
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