Barco F90 series, Руководство по обслуживанию

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5. GP6 system functional description
5.5 Firmware
About
The functionality of the projector is based around a FPGA core that realizes all signal-processing, without the need for separate
special signal processing devices. Most of the functionality in the unit is therefore de
fi ned in fi rmware.
To enable a maximum level of freedom to con fi gure of the system, most functionality of the PCB Main is programmed through FPGA
housekeeping. Firmware fl ash is simply performed by saving the updated fi rmware on a USB memory stick and inserting it in the
system’s USB port. When system powers up, it will automatically detect and load the upgrade without more intervention by the user.
System fi rmware consists of the following parameters, and will load a combination of pre-sets, based on the part number it is named
with, as well as the color wheel cassette ID it is currently equipped with.
New features and updated functionality will be released and posted on the web. It is recommended that the system is kept updated
with the latest
fi rmware release.
INPUTS TI LOOP DLP FPGA
SW
Image 5-4
CW Algorithms
Different color wheels require different timing algorithms to synchronize the DMD against the color wheel. These algorithms are
stored in the system. The correct algorithm is automatically selected by the system based on the ID of the colorwheel cassette in
use. Please observe that the system has no automatic facilities to detect the index timing as this is individual for each and every
colorwheel. Consequently, after replacing the colorwheel, index adjustment must be performed in the service menu.
5.6 System Safety Loop
System Safety Loop
The projector is equipped with an internal safety loop ensuring that the system is not damaged if the internal temperature exceeds
normal temperature range. The safety loop was introduced as an additional Hardware safety requirement in new projectors around
2010.
The safety loop in GP6 is primarily build up by a combination of bimetallic switches, mechanical switches and NTC thermistors.
This system is also known as thermal loop, designated to monitor each corresponding light path. A total of 5 bimetallic switches
are connected in serial within the system. There are two bimetallic switches for each light path and one on the DMD Heatsink (cold
plate).
Bimetal switches are normally closed while in operation, but will open when temperature exceeds threshold temperature (90°C).
This loop of bimetallic switches is controlled from the DC Power supply, and if one switch releases the system will power down.
There are also four mechanical switches included in this loop, two at the bottom cover and two by each Laser cluster detecting they
are in correct position.
Finally there are 12 NTCs, one at each laser bank adjusting the input effect to the lasers, dependent of temperature. If the measured
temperature exceeds 84°C lasers will be shut down by the laser drivers.
Each loop can be measured with a multimeter in order to detect an open circuit in the loop. This must be
performed with the projector switched off / disconnected from the power source.
22 723–0016 F90 01/12/2017