GE AKTA avant User Manual page 411

Problem
External digital equip-
ment does not respond
to set changes in Digi-
tal Out
Analog In does not
measure expected
voltage
Noisy analog signal
Analog In does not
measure expected
voltage
Analog Out does not
generate expected
voltage
Instrument display
Problem
Absence of or incorrect
colors
ÄKTA avant User Manual 29035184 AE
8.7 Troubleshooting: Other components
Possible cause and action
Cables incorrectly connected
•
Make sure that the cables are connected correctly,
earth to earth etc.
To isolate the problem:
1 Connect Digital Out (e.g. pin 6) to Digital In (pin 1,2,3,
or 4).
2 Change the Digital Out 1 signal between "1" and "0".
Verify that Digital out follows.
3 If not: contact Service.
If it does: the problem probably lies within the connect-
ed equipment.
Auto-zero on the wrong level
•
Reset Auto-zero.
Digital Out connection error
•
Make sure that Digital Out is connected correctly, earth
to earth etc.
Too long cable between the external equipment and
•
E9
Use as short cable as possible. Use shielded cable.
Connect the cable shield to the D-sub connector's
shield.
Analog In is not calibrated
•
Contact Service.
Analog Out is not calibrated
•
Contact Service.
Possible cause and action
Display is broken
•
Generate a System error report and contact Service.
8 Troubleshooting
411