Overview
DSX™ System Service Manual 7-1
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Chapter 7 Replacing Components - Pipette/XYZ Axis
Assemblies
7.1 Overview
This chapter describes the servicing and replacement of the Pipette Assembly plus a number
of other items on the XYZ Axis Drive Assemblies.
Pipette Assembly: The pipette assembly is used to withdraw liquids from a variety of
sources (for example, samples, standard solutions, etc.) and deliver them to the well
plate. In addition, the pipette assembly is used to move the well plate to various
positions in the system. The pipette assembly is considered as an integrated unit that is
replaced as a module because it includes a number of components that must be
specifically calibrated at the manufacturing facility. Replacement of the entire
assembly is described in the section entitled Replacing the Pipette Assembly on
page 7-4.
X-Axis Drive Assembly, Y-Drive Assembly, and Z-Drive Assembly: The X- Axis
Drive Assembly, Y-Drive Assembly and Z-Drive Assembly are used to position the
Pipette Assembly at the appropriate location for a specific task (for example, move the
Pipette Assembly to a well to deliver a reagent). Each drive assembly includes a
number of components that can be readily replaced by the service engineer (for
example, the drive belt, the controller board, the drive pulley, the drive motor, etc).
While the general mode of operation is identical for all three-drive assemblies, we will
describe the replacement of the components for each drive in a separate section, as the
design of each of the assemblies is different. The Z-Drive is described in The Z-Drive
Assembly section on page 7-16, the Y-Drive is described in The Y-Drive Assembly
section on page 7-31, and the X-Drive is described in The X Axis Drive Assembly
section on page 7-43.
This chapter describes the replacement of components for which there is a reasonable
expectation that the service engineer may be required to replace. The following conventions
are used:
Removal of components that are structural in nature and unlikely to be serviced will
not be described.
It is assumed that the service engineer will remove all appropriate cables from an item
before it is removed from the system. The service engineer should remove the cable as
close as possible to the item to be removed and note the position of the cable for
reinstallation.
After the component is reinstalled, it is necessary to perform the post-service checkout
protocol as described in the Post-Service Checkout Protocol section on page 3-6.
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