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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
Summary of Contents for F90 series
Page 1: ...F90 Service Manual 723 0016 02 01 12 2017...
Page 6: ...Table of contents 4 723 0016 F90 01 12 2017...
Page 8: ...1 Introduction 6 723 0016 F90 01 12 2017...
Page 10: ...2 General safety 8 723 0016 F90 01 12 2017...
Page 18: ...4 DLP System General Description 16 723 0016 F90 01 12 2017...
Page 25: ...5 GP6 system functional description Image 5 5 723 0016 F90 01 12 2017 23...
Page 28: ...5 GP6 system functional description 26 723 0016 F90 01 12 2017...
Page 34: ...7 OSD display menu 32 723 0016 F90 01 12 2017...
Page 36: ...8 Thermal management system Image 8 1 34 723 0016 F90 01 12 2017...
Page 42: ...8 Thermal management system 40 723 0016 F90 01 12 2017...
Page 58: ...14 XPS actuator 56 723 0016 F90 01 12 2017...
Page 60: ...15 Light engine 58 723 0016 F90 01 12 2017...
Page 82: ...18 Assembly Hierarchy 80 723 0016 F90 01 12 2017...
Page 103: ...20 Scheduled operations Image 20 42 Image 20 43 723 0016 F90 01 12 2017 101...
Page 104: ...20 Scheduled operations 102 723 0016 F90 01 12 2017...
Page 112: ...21 DMD DMD Board CLGA DMD heatsink elements 110 723 0016 F90 01 12 2017...
Page 132: ...24 Lens shift assembly 130 723 0016 F90 01 12 2017...
Page 134: ...25 Prism Housing Image 25 5 132 723 0016 F90 01 12 2017...