6 Osmetech OPTI™ Repair Procedures
Service Manual – Osmetech OPTI™ Analyzer
6-15
Osmetech OPTI™ CCA Systems S/N <4000
The Osmetech OPTI™ CCA is completely housed in a molded plastic case which
provides a chassis for the electronic and mechanical assemblies.
The analyzer is designed for quick removal of all major assemblies. Some of the
components such as the printer, pump cartridge and top plate are accessible from
the outside of the analyzer. The analyzer interior is accessible, after removing
the bottom of the analyzer. The following chapter describes the removal of the
major assemblies of the Osmetech OPTI CCA S/N <4000.
Caution: Before disconnecting any analyzer assemblies, disconnect the analyzer
from primary power and remove the installed battery to avoid electrical damage
Pump Cartridge
Removal
The pump cartridge can be removed easily. Open the printer compartment cover
to access the pump cartridge. Grasp the pump cartridge and pull straight up to
free it from the pump motor shaft. The label on the pump cartridge contains the
date of manufacture (DOM: WW – 2 digit calendar week; YY – 2 digit year – see
Figure 13).
The pump cartridge should be replaced if it is more than 12 months old.
Installation
To install the pump cartridge, first check whether the flat in the pump spool is
aligned with the flat on the pump motor shaft. If the flat on the pump spool is not
aligned, a coin can be used to turn the spool within the pump cartridge housing
and align the pump spool with the motor shaft. The motor shaft may also be
turned for easier reinstallation of the pump cartridge. For easiest alignment of
the motor shaft, turn the motor shaft so the flat on the motor shaft is parallel to
the right side of the analyzer housing with motor shaft flat to the right. Insert the
pump cartridge and press down with a slight force so the cartridge fits onto the
motor shaft and ensure the cartridge is seated into the pump ports.
Press down on the pump spool to prevent the pump roller from binding on the
pump cartridge housing, otherwise the pump will be noisy.
