Startup Sequence Of An Tf-20 Display System - Barco TF-20 Service Manual

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2.7

Startup sequence of an TF-20 display system

The ﬁrst two steps of the startup sequence are done manually.

Startup sequence:

1. Switch on the main power to the SLite tiles.

Note: Nothing happens yet.

2. Power up the digitizer.

The digitizer generates a START signal for the ﬁrst tile.

The digitizer places video content, of the last selected input slot, on the data line to the LED display.

3. The START signal triggers the re-sync/controller unit of the ﬁrst tile to start up on the line voltage provided on the data cable.

The re-sync/controller unit transfers the START signal to an ON signal for the local SMPS.

The green LED on the re-sync/controller unit remains off.

The red LED on the re-sync/controller unit will only light up in case there is no video content present on the incoming data line.

The re-sync/controller unit delays the START signal about half a second before sending it to the next tile. This is necessary

to reduce the inrush current of the complete TF-20 display. This delayed START signal will activate the next tile and so on.

4. The ON signal from the re-sync/controller unit triggers the local SMPS to start up.

The four internal fans starts to turn.

5. The power distribution unit starts up.

The power distribution unit generates +15V and +8V.

The +15V red LED and the +8V red LED goes on.

6. The controller starts up.

The controller generates the local +5V and the local +8V line voltage.

The +5V red LED on the controller unit goes on.

The local +8V line voltage supports the line voltage on the data cable to supply the resync-unit.

7. The controller unit starts to initialize.

The yellow LED on the controller unit lights up continuously.

The green LED(s) on the controller unit starts lighting up after the FPGA(s) are conﬁgured.

The Yellow LED on the controller unit starts to ﬂash (half a second on, half a second off) indicating the controller is completely

and correctly initialized.

8. The LED driver receives data from the controller.

The yellow LED on the LED drivers goes on.

9. The TF-20 tile shows video content.

R59770270 TF-20 21/05/2008

2. General information

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