2. General information
2.7
Startup sequence of an TF-20 display system
The
fi
rst 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
fi
rst 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
fi
rst 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 gen15V 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 con
fi
gured.
-
The Yellow LED on the controller unit starts to
fl
ash (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
15
Summary of Contents for TF-20
Page 1: ...TF 20 Service Manual R59770270 00 21 05 2008...
Page 4: ......
Page 6: ...Table of contents 2 R59770270 TF 20 21 05 2008...
Page 13: ...2 General information 7 Image 2 5 7 Dust filter R59770270 TF 20 21 05 2008 9...
Page 24: ...3 Diagnostics 20 R59770270 TF 20 21 05 2008...
Page 47: ...6 Tile disassembling Image 6 18 R59770270 TF 20 21 05 2008 43...
Page 53: ...6 Tile disassembling Image 6 30 R59770270 TF 20 21 05 2008 49...
Page 56: ...6 Tile disassembling 52 R59770270 TF 20 21 05 2008...
Page 59: ...7 Tile reassembling Image 7 3 R59770270 TF 20 21 05 2008 55...
Page 92: ...C Specifications 88 R59770270 TF 20 21 05 2008...
