Service manual

PN 4237242C
2.3-6
INSTRUMENT DESCRIPTION
FLUIDICS PANEL
Syringe Assembly
The Syringe Assembly is located on the right front of the instrument and consists of two
identical syringe drives with different syringe bodies. See Figure 2.3-5. Both are driven with
the same type of stepper motor that is used by the Probe/Wipe Traverse Assembly and the
Peristaltic Pump Assembly. Motion is accomplished using a belt-driven lead screw. The
lead-screw assembly, purchased as a component, is comprised of the lead screw, lead-screw
housing and backlash spring.
The left syringe drive has a 5-mL syringe mounted to it and is used for supplying diluent to
the count dilutions. A 100-µL syringe is used for sample aspiration and RBC aspiration. Input
and output control is the responsibility of solenoid valves LV14, LV15, and LV16, mounted on
the Diluter Panel.
Figure 2.3-5 Syringe Assembly
Table 2.3-2 Peristaltic Pumps Location and Function
Pump Location Function
PM1 (Air/Mix) Upper right Provides air for isolation and mixing bubbles.
PM2 (Diluent) Upper left Fills the diluent reservoir from the diluent tube.
PM3 (Rinse) Lower left Rinses the baths with fluid from the diluent reservoir.
PM4 (Waste) Lower right Drains the VIC and both red and white baths.
7242008A
DILUENT
SYRINGE
ASPIRATION
SYRINGE
STEPPER
MOTORS