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Malfunction
Operation impaired at indi-
vidual work-stations.
The keyboards or mice
cannot be remote-con-
trolled for all the participant
computers, whereas the
mice and keyboards work
in local mode.
9 Troubleshooting
General information on troubleshooting
▶ Check if all connected participants, the teacher as well as beamer and notebook,
if applicable, are recognised properly.
▶ Turn the room keyboard off and on again.
▶ Check the display of the keys.
ð
Participant keys and "Notebook" key are on.
ð
The "Teacher" key flashes quickly, the "Beamer" key flashes slowly.
ð
If, subsequently, only the three group keys are on, the assignment of keys is cor-
rect.
In case of error
▶ Reassign all keys.
See also:
2 5.2 Assign the participant keys, Page 23
2 5.3 Assign the teacher key, Page 23
2 5.4 Assign the group keys, Page 24
2 5.5 Assign the beamer key, Page 24
2 5.6 Assign the notebook key, Page 25
▶ If there is an image transmission error, identify the corresponding work-station
based on the installation plan.
Due to the ring system wiring, the screen contents are always sent from one parti-
cipant box to the next following the ring.
▶ Identify defects and/or defective participant boxes, power supplies or wiring prob-
lems based on the installation plan by displaying the various participant screens
and/or sending screen content "To all".
▶ Make sure that the "BUS out" connectors of the participant boxes are always con-
nected to "BUS in" connectors of the subsequent participant box.
ð
If image transmission is active and functional, the "PWR" and "LINK" LED are on.
Cause
The bus cable plug is
loose at an unaffected unit.
Defective computer.
Participant box or bus
cable is defective.
Different or special mice
and keyboards.
Instructions for use KaVo EDUnet ULTRA HD
Remedy
▶ Make sure that all plugs are connected firmly.
▶ Check the function of the computer without the
participant box and troubleshoot the problem on
the computer, if necessary.
▶ To find a defective part, exchange the participant
box and bus cable one-by-one. For this purpose,
make network smaller by moving the terminating
resistor connectors.
▶ Use identical mice and keyboards. Do not use any
special mice and keyboards.
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9 Troubleshooting
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