Barco SLite, Service Manual

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2. General information
Fan interconnections
Image 2-6
2.4 Startup sequence of an SLite 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 resync-unit of the first tile to start up on the line voltage provided on the data cable.
- The resync-unit transfers the START signal to an ON signal for the local SMPS.
- The green LED on the resync-unit remains off.
- The red LED on the resync-unit will only light up in case there is no video content present on the incoming data line.
- The resync-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 SLite display. This delayed START signal will activate the next tile and so on.
4. The ON signal from the resync-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 gen15V and +8V.
- The +15V red LED and the +8V red LED goes on.
6. The controller unit starts up.
- The controller unit 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.
- The presence of the local +8V line voltage on the resync-unit lights up the green LED on 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 R5976621 SLITE DISPLAY 02/09/2005