
Chapter
5
Publication 1336 IMPACT-6.8 – November, 2002
Part Replacement Procedures
This chapter describes procedures required to replace drive
components. This chapter references Chapter 3, Access Procedures
for basic drive component access.
The part replacement procedures in this chapter assume that the drive
enclosure is open. For more information on opening the drive
enclosure, refer to Chapter 3, Access Procedures.
!
ATTENTION: Some printed circuit boards and drive
components may contain hazardous voltage levels.
Remove power before you disconnect or reconnect
wires, and before you remove or replace fuses and
circuit boards. Verify bus voltage by measuring the
voltage between between the Negative Capacitor Bus
and both ends of all three bus fuses. An open fuse does
not show voltage across both ends of the fuse. Failure to
measure voltage at both ends of the fuses may result in
death or serious injury. Refer to Figure 3.5. Do not
attempt to service the drive until the bus voltage has
discharged to zero volts.
!
ATTENTION: This assembly contains parts and
sub-assemblies that are sensitive to electrostatic
discharge. Static control precautions are required when
servicing this assembly. Component damage may result
if you ignore electrostatic discharge control procedures.
If you are not familiar with static control procedures,
reference Rockwell Automation Publication
8000-4.5.2, Guarding Against Electrostatic Discharge,
or any other applicable ESD protection handbook.
Electrostatic discharge generated by static electricity can damage the
complementary metallic oxide semiconductor devices on various
drive boards. It is recommended that you perform these procedures
to guard against this type of damage when circuit boards are
removed or installed:
Chapter Objectives
Part Replacement
Overview
Safety Precautions
Electrostatic Discharge
Precautions
Содержание Allen-Bradley IMPACT 1336 Series
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