• controller board
• optional hard drives
Note: The printer control panel and controller board contain NVRAM.
2 After removing the old part, it must be returned to your next level of support.
Handling ESD‑sensitive parts
Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent damage
to ESD-sensitive parts, use the following instructions in addition to all the usual precautions, such as turning off power
before removing logic boards:
• Keep the ESD-sensitive part in its original shipping container (a special “ESD bag”) until you are ready to install the
part into the machine.
• Make the least-possible movements with your body to prevent an increase of static electricity from clothing fibers,
carpets, and furniture.
• Put the ESD wrist strap on your wrist. Connect the wrist band to the system ground point. This discharges any static
electricity in your body to the machine.
• Hold the ESD-sensitive part by its edge connector shroud (cover); do not touch its pins. If you are removing a
pluggable module, use the correct tool.
• Do not place the ESD-sensitive part on the machine cover or on a metal table; if you need to put down the ESD-
sensitive part for any reason, first put it into its special bag.
• Machine covers and metal tables are electrical grounds. They increase the risk of damage, because they make a
discharge path from your body through the ESD-sensitive part. (Large metal objects can be discharge paths without
being grounded.)
• Prevent ESD-sensitive parts from being accidentally touched by other personnel. Install machine covers when you
are not working on the machine, and do not put unprotected ESD-sensitive parts on a table.
• If possible, keep all ESD-sensitive parts in a grounded metal cabinet (case).
• Be extra careful while working with ESD-sensitive parts when cold-weather heating is used, because low humidity
increases static electricity.
Controller board/control panel replacement
This procedure should be followed only if both the controller board and the control panel fail. If you need to replace
only one of the FRUs, follow the startup procedure described in the FRU’s removal procedure.
CAUTION—POTENTIAL INJURY
The lithium battery in this product is not intended to be replaced. There is a danger of explosion if a lithium
battery is incorrectly replaced. Do not recharge, disassemble, or incinerate a lithium battery. Discard used
lithium batteries according to the manufacturer's instructions and local regulations.
Warning—Potential Damage: If the control panel and the controller board are being replaced at the same time,
replace the parts in this order to avoid damage to the machine.
1 Replace the controller board first.
Note: Do not replace the new control panel and controller board in the machine at the same time.
2 After installing the new controller board, and before installing the new control panel, start the printer into
diagnostics mode.
5027
Repair information
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