Barco – TransForm A – DOC-3358-2 – service manual – Revision 06 – March 2007
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3-4
•
Insert the power module into the system. Take care to insert it in the same orientation like the other module
with the
mains connection [25] on the upper side!
•
Tighten the
securing screw [37]!
•
Re-plug the power cord into the
mains connection [25]!
•
Switch on the power module with the
power switch [35]!
•
Check that the
green LED [36] starts lighting!
•
Check that the red LED
power module failed [6] at the front of the P
ROCESSOR
/ E
XTENDER
stops lighting!
3.2.2
Redundant power modules of the OmniBus A18
The O
MNI
B
US
A18 with redundant, hot-plug power modules can be connected to two independent power nets. If
one of the two power modules or a power net is failing the LED
operating status [2] at the front changes from
green to red and starts blinking. This LED remains blinking as long as the failure persists; please refer to section
2.3.1 The front of the OmniBus A18
. One of the possible reasons could be that one power module has failed. There-
fore proceed as follows:
•
Open the front cover as explained in section
2.3.6 Opening the front cover of the OmniBus A18
•
Examine the power modules. They are located at the lower front of the O
MNI
B
US
A18.
2
5
4
5
3
1
5
1
securing screw
2
green LED:
Output power good
3
handle
4
green LED:
Input power good
5
air supplies
Figure 3-3
Front view of the power module
Each power module has again two LED’s to indicate the power state, the right LED
Input power good [4] is light-
ing, if the connection to the power supply is OK. The left LED
Output power good [2] is lighting, if the output
power of the module is OK. The table below lists the different LED status combinations and their meaning:
LED [4]
Input power good
LED [2]
Output power good
Meaning
On
On
There is power supplied to the power module and it is working
well.
On
Off
There is power supplied to the power module. The power mod-
ule has a failure and must be replaced.
Off
Off
There is no power supplied to the power module, e.g. the
power net failed or the power cable is not connected.
In rare cases it could be possible that there is a defect at the
contacts of the power module. Then it might help to exchange
the power module.
Table 3-1
LED states of the power modules
