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firmware 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 firmware 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 firmware release.
INPUTS
TI LOOP
DLP
FPGA
SW
Image 5-5
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
About
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 GP7 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 3
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.
Summary of Contents for F70 Series
Page 1: ...ENABLING BRIGHT OUTCOMES Service manual F70...
Page 8: ...723 0018 02 F70 8...
Page 11: ...11 723 0018 02 F70 General safety 2...
Page 14: ...723 0018 02 F70 14 General safety...
Page 21: ...21 723 0018 02 F70 DLP System General Description 4...
Page 26: ...723 0018 02 F70 26 DLP System General Description...
Page 36: ...723 0018 02 F70 36 GP7 system functional description...
Page 40: ...723 0018 02 F70 40 GP7 periodic maintenance...
Page 44: ...723 0018 02 F70 44 OSD display menu...
Page 53: ...723 0018 02 F70 53 Long Lifetime setting 0m asl Image 8 7 Thermal management system...
Page 54: ...723 0018 02 F70 54 Thermal management system...
Page 58: ...723 0018 02 F70 58 Lenses and adjustment...
Page 59: ...59 723 0018 02 F70 Optical adjustments 10...
Page 65: ...723 0018 02 F70 65 Image 11 2 Picture distortion Colorwheels...
Page 66: ...723 0018 02 F70 66 Colorwheels...
Page 67: ...67 723 0018 02 F70 Phosphor wheel 12...
Page 70: ...723 0018 02 F70 70 Phosphor wheel...
Page 71: ...71 723 0018 02 F70 Laser pulsing adjustment 13...
Page 74: ...723 0018 02 F70 74 Laser pulsing adjustment...
Page 79: ...79 Image 15 1 723 0018 02 F70 Power Supply Unit PSU 15...
Page 83: ...83 723 0018 02 F70 Troubleshooting 16...
Page 102: ...723 0018 02 F70 102 Troubleshooting...
Page 104: ...723 0018 02 F70 104 Image 17 1 Assembly hierarchy...
Page 113: ...723 0018 02 F70 113 Image 17 23 Assembly hierarchy...
Page 114: ...723 0018 02 F70 114 Assembly hierarchy...
Page 115: ...115 723 0018 02 F70 Scheduled operations 18...
Page 164: ...723 0018 02 F70 164 Image 22 14 Lens shift assembly...
Page 165: ...165 723 0018 02 F70 Prism Housing 23...
Page 167: ...723 0018 02 F70 167 Image 23 5 Prism Housing...