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7462
Scanner unit assembly removal (MB780)
Warning: When replacing any of the following components:
•
Scanner interface card assembly
•
System card assembly
•
Scanner unit 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.
These components can be used as a method of troubleshooting as long as the machine is booted into diagnostic
mode or is operating in diagnostic mode. Once a component has been installed in a machine and powered up
into user mode, it cannot be used in another machine. It must be returned to the manufacturer.
1. Remove the ADF unit assembly. See
only)" on page
2. Remove the scanner controller card cage cover.
3. Remove all cables.
4. Remove the two plastic screws (A) and screw (B) securing the ground strap to the left side of the scanner
unit assembly.
B
5. Remove the scanner cover, right. See
only)" on page
6. Remove the two plastic screws (C) securing the right side of the scanner unit assembly to the printer.
4-94
Service Manual
"ADF unit assembly removal (model MB780
4-85.
A
"Scanner cover, right removal (model MB780
4-136.
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