Yokogawa Removable Chassis DX1000N - Manual (Page 62)

7-3
SM 04L41B01-01E
Replacing Parts
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7.3 Pulling Out the Inner Instrument (DX1000N)
Notes
This section explains how to pull out the inner instrument. Refer to these instructions as
well when reinstalling.
WARNING
• When reinstalling the inner instrument, check that no foreign objects are inside
the case, that the connector pins are not bent, and that no other abnormalities
exist. These can be causes of fire, electric shock, and damage to instruments.
• Always turn OFF the power switch when pulling out the inner instrument.
• Certain locations inside the instrument carry high voltages, and are dangerous.
• Pulling out PCBs while the power is ON can damage electronic components.
• Circuit patterns of the printed circuit board are exposed. Be careful when
handling so that hands or fingers are not injured by the protruding pins.
CAUTION
• Do not disassemble the inner instrument. When replacing components such
as the power supply assembly, or when any structural changes are made, you
must perform tests of the insulation resistance, withstand voltage, and protective
grounding function (see chapter 3).
• Tighten the screw to a torque within the specified range.
• If the bezel screw is tightened to less than the specified torque, the protective
grounding function may not function normally.
• Tightening the screw to a torque above the specified range can damage the
screw.
• When releasing the bezel latches, the bezel can break if the bottom is pulled out
forcefully. Do not forcefully pull towards you until the latches are released.
• Circuit patterns of the printed circuit board are exposed. If other metalic
materials touch these patterns, electrical shorting will occur, causing the circuit
to be damaged or burnt.
• The internal circuitry is vulnerable to damage from static electricity. Take
appropriate measures to ensure that static electricity is not applied to the internal
circuits.
• When securing the bezel, note the following points:
• Make sure the packing is properly and completely affixed around the bezel. If
not properly affixed, screws can be damaged, and the water and dust proof
capability may be impaired.
Incorrect
Bezel
Correct
• Push in the bezel so that it is vertical before tightening the screws. If the bezel
is at an angle when the screws are tightened, screws can be damaged.