ABL77 Service Manual Chapter 3: Troubleshooting
Reference Table, Continued
Problem Probable Cause Corrective Action
QC - results out of range
If failures are occurring with
multiple sensor cassettes over
time see "Calibration,
Initialization, or QC failures
with multiple sensor cassettes
over time"
Incorrect handling Review the user's QC technique.
Stress the importance of
thorough mixing and aspirating
the sample immediately after
opening.
Incorrect temperature of
ampoule
Equilibrate ampoule to a known
temperature. Ensure the correct
QC Temperature value is
entered into the analyzer
Incorrect ranges Use correct ranges. Ensure
proper ranges are entered into
analyzer
Incorrect lot Verify the proper lot of QC
material is being tested
Faulty sensor function
• Perform a manual calibration
and repeat the QC
measurement
• If QC fails repeatedly,
activate QC lockout,
inactivate parameter or
replace sensor cassette
Screen - blank/dark display
Description: the screen remains
dark and blank despite signs of
power (beeps, fan running etc)
LCD Display Cable Check the cable connection. If
securely connected, replace the
cable. See Chapter 6,
Replacements
Backlight Inverter Check the connection. If
securely connected, replace the
backlight inverter. See Chapter
5, Dismantling
LCD Adapter Board
malfunction
Replace the LCD Adapter
Board. See Chapter 5,
Dismantling
Screen - blank / illuminated
The application software has not
successfully loaded due to a
CPU failure
Replace the main CPU. See
Chapter 5, Dismantling
Description: the screen lights up
(glows but there is no text or
graphics)
LCD Adapter Board
malfunction
Replace the LCD Adapter
Board. See Chapter 5,
Dismantling
Continued on next page
3-13
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