Chapter 3: Troubleshooting ABL77 Service Manual
Reference Table, Continued
Problem Probable Cause Corrective Action
Calibration, Initialization, or
QC failures of the Hct channel
with multiple sensor cassettes
over time. Also multiple false
air-in-sample messages with
multiple sensor cassettes over
time
Insufficient 5V supply of power Proceed to Chapter 4, Test and
Calibration Procedures to
check the 5 volt power supply.
Adjust as necessary.
Calibration of SC/Hct circuit is
not possible. Unable to attain
target calibration values.
Insufficient 5V supply of power Proceed to Chapter 4, Test and
Calibration Procedures to
check the 5 volt power supply.
Adjust as necessary.
Computer – Incomplete boot-
up
CPU Board Malfunction Replace CPU Board. See
Chapter 5, Dismantling
Chip Disk Malfunction Replace Chip Disk. See Chapter
5, Dismantling
Computer – clock malfunction CPU Board Malfunction
(software versions 1.30 or
lower)
Replace CPU board. See
Chapter 5, Dismantling
Analog board real-time clock
malfunction or clock battery on
analog board depleted (software
versions 1.32 or higher)
Replace analog board. See
Chapter 5, Dismantling
Disk Drive
Disk drive failure Replace the disk drive. See
Chapter 5, Dismantling
Disk drive cable Check the connection. Replace
as necessary. See Chapter 6,
Replacements
Main CPU Replace the main CPU. See
Chapter 5, Dismantling
Floppy diskette damaged, full,
or has write-protect activated.
Use another diskette or
inactivate the write-protect.
Leak – at manifold Worn manifold gasket. Can
cause fluid leakage into printer
area.
Replace gasket. Refer to
specific instructions in Chapter
5, Dismantling. The first step is
to identify the correct version of
gasket that is being replaced.
Also, check the printer to ensure
there is no corrosion.
Continued on next page
3-10
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