AMX Optima Instruction Manual page 76

DVI (Digital Visual Interface) I/O Boards
Checking for Potential Over-Current Shutdown (applies to initial setup of Optima system)
To check for potential over-current shutdown:
1. Follow the instructions for initial installation starting on page 21.
For the 8x8 DVI board only, modify Step 4 on page 22 by following Steps 2 through 9 below.
2.
Attach the first destination device to Output 1.
3. Cycle power to the Optima and the first destination device.
4.
Note the device attached to Output 1 to see if it still has power (visually check for display).
If the device does not have power, go to Step 8 below.
If the device has power, attach the second destination device to Output 2.
5.
Cycle power to the Optima and the two destination devices.
6. Note the destination devices to see if they still have power (visually check for display).
7.
Repeat Steps 2 through 6 with the third destination device being attached to Output 3, and so on for
the remaining devices and connectors.
8.
If a set of four connectors shuts down (destination devices lose power) after attaching a device,
replace or eliminate that device.
Tip: If the device is attached to one of the second set of outputs (5 through 8), it may resolve the
problem to attach the device to one of the first set of outputs (1 through 4), which have a higher
output power rating.
9.
After all the destination devices are connected, cycle power to the Optima and all the destination
devices.
Troubleshooting When Protection Condition Occurs During Operation
When a protection condition occurs, first, check each destination device separately for any obvious
malfunction. If there is no obvious problem with any of the devices, see the following information and
troubleshooting procedure.
In this following example, an Optima system is set up and running with all DVI outputs connected to
destination devices. An unexpected occurrence causes Destination 3 to draw more power than the board
supports and results in a protection condition (Destinations 1 through 4 do not receive power).
To determine which device triggered the protection condition:
1.
Detach destination devices 1 through 4 from the connectors (do not cycle power to any equipment).
2.
Attach Device 1 to Output 1 (normal operation)
Attach Device 2 to Output 2 (normal operation)
Attach Device 3 to Output 3 (protection condition – none of the three devices have power).
3.
Detach all three devices.
4.
Reattach Devices 1 and 2 (normal operation) and attach Device 4 (normal operation).
5. Replace or eliminate Device 3.
The protection condition responds to a cumulative power draw. For example, the protection condition
may occur after Device 4 is attached because its current draw puts the cumulative power draw over the
board's limit, not because Device 4 itself is defective. It may be necessary to experiment with the order
of reattaching devices. One method to help isolate the defective device is to attach the devices in reverse
order.
70 Optima Instruction Manual