Hitachi Koki USA DDC 35n - Manual (Page 153)

Jumper Settings
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The NIC will normally automatically configure the network
configuration without the need to access internal jumpers. However,
there are certain jumpers on the card that you may have to access under
certain circumstances. If you need to change the jumpers, follow the
steps in this section.
HANDLING PRECAUTIONS
FOR
STATIC SENSITIVE DEVICES
The Network Interface Card is normally contained within the
printer which acts to protect sensitive components from damage
due to electrostatic discharge (ESD) during normal operation.
When performing installation procedures, however, take proper
static control precautions to prevent damage to equipment.
Make sure you do not have the printer plugged into a wall outlet. If it
is, unplug the power cord BEFORE you open the unit. Remove the
NIC according to the printer instructions.