Service manual

PN 4237242C
7.1-2
TROUBLESHOOTING
TROUBLESHOOTING DIAGNOSTICS
Service Menu
The Service menu contains six visible menu items. These are items the customer has access to
but will not often use. They are of most use during troubleshooting and are discussed in
Table 7.1-2. There is a seventh item, Service Diagnostic, that is hidden from the customer.
Table 7.1-2 Service Menu Options
Function Description When to Use
LATEX GAIN
(for Coulter
service
personnel only)
Adjusts the RBC and WBC aperture current
settings. Adjustment is necessary when the
mean volumes are greater than 1.5 fL from
the latex assay. See Heading 4.27, LATEX
GAIN ADJUSTMENT.
To adjust the RBC and WBC aperture current settings to
compensate for component and temperature
variations.
When the apertures, the Sensor Preamp Adapter card
or the SPAD card are replaced.
REPLACE
SYRINGE
(for Coulter
service
personnel only)
Moves syringes to a middle-stroke position,
making removal/replacement easier.
Note: The power must be turned OFF during
this procedure.
Each time the syringe bodies are removed.
PULSE TEST
Generates a string of pulses, feeds them
into the SPAD card and generates a report
giving counts, MCV and histograms. See
Test Pulse Generator under Heading 2.5,
DATA ACQUISITION.
To verify SPAD card operation when signal processing
of pulse data is in question.
Note: This test verifies inoperable or dead circuits on
the SPAD card. It does not however, indicate how well
the SPAD card deals with the complex pulse train of a
real sample.
VOLTAGE
READINGS
Displays a PASS/FAIL message for the +5 V,
+12 V and +15 V power supplies. Also
displays the aperture current settings and
the Hgb voltage.
To verify the +5 V, +12 V and +15 V power supplies.
To verify the aperture current settings.
To troubleshoot/adjust Hgb voltage.
VACUUM
ADJUST
Allows the operator to adjust the system
count vacuum.
Note: There is no system indicator for the
high or raw-vacuum output of the vacuum
pump.
When the instrument’s count vacuum requires
adjustment.
To indicate vacuum while troubleshooting.
REVISION
LEVELS
Determines the software revision level that
is currently loaded by the instrument.
Note: Although there are several hardware
items listed, the hardware cannot indicate a
revision level to the software.
To determine the software revision that is currently
loaded by the instrument.
[no menu item
displays on the
screen] Service
Diagnostic
A diluter table (or cycle) that energizes
solenoids and the Probe/Wipe Traverse
Assembly motors, one by one. This function
is password protected and the password is
123. See Heading 7.3, SERVICE
DIAGNOSTIC.
To troubleshoot diluter components.
To verify solenoid, probe motor, traverse motor and
traverse sensor operation.