Barco R9851620, Installation Manual

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3. Replacing a bad LED from an ILite LED board
3.1 LED replacement process
Never swap a LED module or LED driver or controller from an ILite tile, because measurement results of the
LED module are stored on the LED driver and controller. So, these boards are matched to each other during
the factory measurement process. Even a swap among the LED modules or LED drivers of the same tile
is not allowed. Neglecting this will result in poor video images displayed on the LED wall. The swapped
LED modules or LED drivers will become visible as quadrants with different light output. Always return the
complete ILite tile to factory for repair and re-measurement in case of a malfunction controller or one or more
malfunction LED modules or LED drivers.
Process stages:
1. Identify and mark bad LED(’s).
This is done by marking, with a suitable marker pen, any mall function LED’s while the tile is operating.
2. Disassemble the LED module(s) from the tile. See following procedures:
a) "Removing the cover", page 13.
b) "Removing the power assembly", page 14.
c) "Removing the controller unit", page 15.
d) "Removing the LED driver", page 16.
e) "Removing a LED module", page 17.
3. Remove the mask from the LED module and create a mould and small stick out of the removed mask. See following procedures:
a) "Removing the mask", page 18.
b) "Creating a mould and small stick", page 20.
4. Replace the marked bad LED’s and install a new mask. See following procedures:
a) "Replacing a bad LED", page 21.
b) "Installing a new mask", page 25.
5. Reinstall the LED module and reassemble the tile. See following procedures:
a) "Installing a LED module", page 27.
b) "Installing the LED driver", page 28.
c) "Installing the controller unit", page 29.
d) "Installing the power assembly", page 30.
e) "Installing the cover", page 31
6. Harden the silicone on the LED module in the tile.
Place the tile on a flat clean surface for at least 24 hours to harden the silicone. Screen side facing the surface.
12 R5976460 ILITE LED REPLACEMENT KIT 29/03/2007