723–0018 /02 F7028
5.1 Electronic platform
About
There are two main electronic PCB’s in the unit; PCB Mainboard and PCB Thermal Hub Board.
In addition there is a power supply and a keyboard/display PCB, and some peripheral PCB’s, such as USB
interface, IR receiver, thermal sensors.
Calibrations and settings for the unit are saved in a SD card on the Mainboard. When replacing the
mainboard, this SD card must be transferred to the new mainboard, in order to maintain the settings for the
unit. Nevertheless, some calibrations has to be performed again, such as the Constant Light Output,
(especially in multi projector setup), and Lens Shift Motors.
It is crucial that all SD card data is transferred to the replacement PCB in the event of repair. Failure
to do this will compromise system dynamic data and lead to incorrect LFM notifications as well as
possible network control conflicts.
5.2 I/O’s and processing tasks:
I/O’s and processing tasks:
In the matrix below is listed the different PCB’s, and their main tasks. In order to localize a malfunction in the
projector, it is an advantage to know which function that is controlled by which PCB.
Together with the block diagram and the troubleshooting matrix, this can be a helpful tool in diagnostic.
See also the “Block diagram GP7 Platform” for an overview of the system.
PCB Tasks
Thermal Hub board Typical tasks as fans, cooling pumps and temperature
sensors are connected here.
DMD Peltier elements, Front and Rear.
Thermal monitoring
Lens shift
Zoom and focus motors
Lens position sensors.
CLO sensor
IR front sensor
Optical actuator
Air filter sensor
Pixel Shift
Main Board Typical tasks, Main signal input, Scaling and control
board.
Process all I/O from the Back Panel, keypad, LCD
screen.
Peripheral PCB, i.e. IR Sensors, USB input
Keyboard & Display
Phosphor wheels
Color wheels
Safety Switches
Air inlet temp. sensor
Air out temp. sensor
Communication with Thermal Hub Board and PSU
unit
Communication with the Laser Driver PCB’s.
Laser Driver Powered by 390V from PSU.
Provide 36V pr cable to the Laser Clusters
GP7 system functional description
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