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2-28 Service Manual
953 .00 Replace the operator panel
board or upper front cover. See
“Upper front cover removal”
on page 4-11 or “Upper front
cover removal” on page 4-11.
Warning: When replacing any
one of the following
components:
• Operator panel assembly
(or upper front cover)
• System board assembly
• Interconnect card assembly
Only replace one component at
a time. Replace the required
component and perform a POR
before replacing a second
component listed above. If this
procedure is not followed, the
printer will be rendered
inoperable. Never replace two
or more of the components
listed above without a POR
after installing each one or the
printer will be rendered
inoperable.
Warning: Never install and
remove components listed
above as a method of
troubleshooting components.
Once a component has been
installed in a printer, it can not
be used in another printer. It
must be returned to the
manufacturer.
Service error codes (9xx.xx) (continued)
Error
code
Sub
codes
Display text Description Action