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  9. Barco R9000901 Operating and safety instructions

Barco R9000901 Operating and safety instructions

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Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 1
808S
Replacement of a picture tube
The picture tube encloses a high vacuum and care must be taken
not to bump or to scratch the picture tube as this may cause the
tube to implode resulting in personal injury and property damage.
Shatterproof goggles must always be worn by individuals while
handling the CRT or installing it in the projector. Do not handle the
CRT by the neck.
WARNING: CRT HANDLING
Attention
Howtoaccessthe
picturetubesforre-
moval
Thefollowingpartsoftheprojectorhavetoberemovedtogainaccesstothepicture
tubes: -topcover(totalremoval)
-topcoverplate,coveringthepicturetubeassembly.
How to open top cover Toopenthetopcover,proceedtothefollowingstep:
Step Action
1Power down the projector and pull out the power cord from the wall outlet.
2Turnthe lockscrew witha screwdriveror acoin ahalf turncounter clock-
wise
3Liftupthetopcoverand carefullypivotitvertically(attention:nocover
supportprovided).
toopen 2
3
Nocoversupport Thetopcoverisnotsecuredwithanincorporatedsupport.Ifacompleteturnoveris
required,weadvisetoremovethetopcovertotally.
to be continued on next page
Illustration how to open
topcover
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 2
808S
How to remove top
cover Toremovethetopcover,proceedtothefollowingstep:
Step Action
1Standbehindtheprojector
2Grip the top cover by the front and turn it until it stands vertical.
3Hit the bottom of the cover on the right side to dislocate the hinge joint.
4Removethetopcover.
2
Illustrationtopcover
removal
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 3
808S
Removing the Picture tube cover
Picturetubecover
assembly Thepicturetubecoverassemblyexistof:
- a bridge metallic plate, securing the position of the three CRT blocks in the main
frame.
-ametallic cover, coveringthethree CRTunitsin themainframe
Necessarytool for the fixation metallic plate: pot nut runner of 8mm & 7mm
for the metallic cover: pot nut runner of 7mm
How to remove the
metallic cover Themetalliccoverconsistsoftwoparts:
- a fixed plate, secured in position by 6 screws and
- a hinged cover, pivoting on the fixed part, and locked on the main frame by 4
screws.
Toremovethecoverassembly,continuewiththefollowingsteps:
Step Action
1Loosenthe4screwslockingthehingedcovertotheframe.
2Loosen the 4 screws securing the fixed plate on the top of the main frame.
3Removethe 2 screwssecuring the fixedplate on theside of themain
frame.
4First lift up (A) the cover and then slide (B) the complete assembly back-
wardstoremove.
Illustration metallic
coverremoval
1
fixed plate
hinged cover
1
1
2
A
B
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 4
808S
Removing the Picture tube cover
How to remove the
bridge metallic plate Toremovethecoverassembly,continuewiththefollowingsteps:
Step Action
1Removethe6 screws (nutdriver7mm) securingtheCRT blocksonthe
plate.
2Removeonbothsidesoftheframethe2screws(nutdriver8mm)
securing the fixed plate on the top of the main frame.
3Removetheplate.
Illustration metallic
coverremoval
1
22
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 5
808S
Removing the Lens of the defective picture tube
Lens
How to remove the lens
Necessarytool Pot nut runner of 8 mm
Support the lens body by hand and remove the 4 screws, holding lens to frame.
The lens is fixed to the main frame by 4
screws, 2 on top and 2 on bottom of the
lens.
lensfixation
screws
holes with screw thread
for lens fixation
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 6
808S
Removing the picture tube from its frame
How to remove the
picture tube out of its
frame
The picture tube unit is fixed to the main frame in two ways:
- Mechanical: two long bolts secure the position of the picture tube support in the
frame.
- Electrical: the Units on the picture tube are electrical connected to the main frame.
To remove the unit, first disconnect the picture tube units electrical from the main
frame and then remove the bolts holding the picture tube support to the main frame.
Necessarytool Screwdriver5mm
Thefollowingunitshavetobedisconnectedfromthemainframe:
-deflectionunitconnection
-focusunitconnection
-groundconnection
-videodriverunit
- EHT lead
How to disconnect the
picturetubeunits
electrical from the main
frame
How to disconnect the
video driver unit Disconnecttheunitsasdescribedbelow:
Step Action
1Pull out the connector on top of the unit.
2Pull out on main frame the wire connector.
3Disconnectthetwogroundconnectors
4Loosenthe2screwsholdingdrivermoduletosupportbrace.
5Carefullypull off the Video DriverUnit from the picture tube socket.
6Lay down the unit, still connected to the frame with the focus wire, out of
theareaofthepicturetubetoberemoved.
1
23
4
Video Driver
Unit
to be continued on next page
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 7
808S
How to disconnect the
Units on the neck of the
picturetube
Disconnecttheunitsasdescribedbelow:
Step Action
1Pull out focus connector on top of unit.
2Pullout on main framethe deflection connector.
1
2
Removing the picture tube from its frame
How to disconnect the
EHT lead of the CRT DisconnecttheEHTleadasdescribedbelow:
Step Action
1Pull out on the EHT splitter the respective EHT lead, e.g. Red CRT.
2Pushthe EHT leadthrough theprovided hole inthe twocover supports to
maketheEHT leadfree forremovalwith thetube.
EHT connection/disconnection
to remove
to secure
1
2
EHT lead of the
Red picture tube
to be continued on next page
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 8
808S
How to remove the
picture tube unit me-
chanical out of the
main frame
Toremovethepicturetubeunit out ofmainframe,proceedasfollows:
Step Action
1Removethetworodswithscrewedthreadattheend.
2Take the picture tube unit out of the main frame
Removing the picture tube from its frame
1
2
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 9
808S
Disassembling the Picture Tube unit
Purpose ThemountedunitsonthepicturetubehavetoberemovedbecausetheCRTspare
consist of a naked picture tube with the EHT cable installed.
Removing the Picture Tube Unit from its support
Necessarytool Pot nut runner of 8 mm
How to remove the
picturetubefromits
support The CRT Unit is mounted on its support by means of four bolts. To separate the CRT
unitfromitssupport,proceedasfollows(seephoto):
Step Action
1Put the CRT Unit on its face.
2Removethefourscrewsholding
picturetube tosupport.
3RemovethePicturetubefrom
its support.
CRTspare=Picture tube+EHTcable
Date: 06/02/98
R9000901
R9000908
GRAPHICS
Replacement of a picture tube 10
808S
Removingthe
Picturetubeunits
fromtheneck The Units on the picture tube are clamped on the neck of the picture tube by means
ofa gear clamp. Follow the next steps to remove:
Gear clamp
Video Drive
support
Gear clamp
Focus Unit
Gear clamp
Deflection Unit
Gear clamp
Magnetic
unit
Clasp ring
Focus Unit
Step Action
1Loosen the gear clamp of theMagnetic unit
2Slidethe unit off of the end of the CRT
3Loosen the gear clamp of theVideoDrivesupport
4Slidethe unit off of the end of the CRT
5Loosen the gear clamp of theFocus and Deflection unitand the clasp
ring ofthe Focusunit.
6Slidethe two units (joined by the ground wire) together offof the end of the
CRT