Partner SP-850-S, Service Manual

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Replacing Field
Replaceable Units (FRUs)
This chapter provides instructions for replacing FRUs.
Before You Begin
Make sure you have a stable, clean working environment. Dust and dirt can get into components
and may cause malfunction. Adequate lighting and proper tools can prevent you from accidentally
damaging the internal components. Most of the electrical and mechanical connections can be
disconnected by using your fingers. It is recommended that you do not use needle-nosed pliers to
disconnect connectors as these can damage the soft metal or plastic parts of the connectors.
CAUTION
To prevent scratching the case of the device, make sure the worktop surface is
clean and flat. If you need to put the display facing down, be sure to use a foam
mat.
Replacing Parts
Take note of the following when replacing parts:
• If you replace an FRU and the symptom remains, reinstall the original FRU before going to the
next step. Do not replace non-defective FRUs.
• When replacing a malfunctioning component, other parts that have to be removed before the
failing part are listed at the top of the page.
• The arrows in the following procedures show the direction of movement to remove/replace a
part, or to turn a screw or key to release a device.
• Always use the correct screw size as indicated in the procedures.
• Always use new screws.
• To replace a part, reverse the removal procedure.