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3. Lenses

Name

Description

Part number

Weight

FLD+ Lens 1.7 - 2.5 : 1 (EN41)

1.58 - 2.33 : 1 (WUXGA) / 1.7 - 2.5 : 1
(WQXGA)

R9801216

2.54 kg

FLD+ NV Lens 1.7 - 2.5 : 1
(NV41)

IR Optimized, 1.58 - 2.33 : 1 (WUXGA) /
1.7 - 2.5 : 1 (WQXGA)

R9801216

2.54 kg

FLD+ Lens 0.8 : 1 (EN42)

0.75 : 1 (WUXGA) / 0.8 : 1 (WQXGA)

R9801226

2.7 kg

FLD+ Lens 1.2 - 1.7 : 1 (EN43)

1.12 - 1.58 : 1 (WUXGA) / 1.2 - 1.7 : 1
(WQXGA)

R9801230

2.84 kg

FLD+ NV Lens 1.2 - 1.7 : 1
(NV43)

IR Optimized, 1.12 - 1.58 : 1 (WUXGA) /
1.2 - 1.7 : 1 (WQXGA)

R9801286

2.84 kg

FLD+ Lens 2.5 - 4.6 : 1 (EN44)

2.33 - 4.3 : 1 (WUXGA) / 2.5 - 4.6 : 1
(WQXGA)

R9801211

3.08 kg

FLD+ Lens 0.75 - 1.13 : 1 (EN45) 0.75 - 1.13 : 1 (WUXGA) / 0.8 - 1.21 :

1 (WQXGA)

R9801220

3.04 kg

FLD+ Lens 0.75 - 1.13 : 1 (EN46) 0.75 - 1.13 : 1 (WUXGA) / 0.8 - 1.21 :

1 (WQXGA)

R9801221

3.14 kg

FLD+ NV Lens 0.8 - 1.21 : 1
(NV46)

IR Optimized, 0.75 - 1.13 : 1 (WUXGA)
/ 0.8 - 1.21 : 1 (WQXGA)

R9801287

3.14 kg

FLD+ Lens 0.65 : 1 (EN47)

0.61 : 1 (WUXGA) / 0.65 : 1 (WQXGA)

R9801295

5.4 kg

Name

Working F#

Iris / Iris F#

Zoom Ratio

Focal Length
(mm)

Focus Range (m)

FLD+ Lens 1.7 -
2.5 : 1 (EN41)

2.1-2.5

Yes 2.1-6.5

1.47

33.70-49.54

1.5 - 15

FLD+ NV Lens 1.7
- 2.5 : 1 (NV41)

2.1-2.5

Yes 2.1-6.5

1.47

33.70-49.54

1.5 - 15

FLD+ Lens 0.8 : 1
(EN42)

2.1

Yes 2.1-6.5

-

16.12

0.7 - 7

FLD+ Lens 1.2 -
1.7 : 1 (EN43)

2.4-2.7

Yes 2.4-6.5

1.42

23.95-34.02

1.5 - 15

FLD+ NV Lens 1.2
- 1.7 : 1 (NV43)

2.4-2.7

Yes 2.4-6.5

1.42

23.95-34.02

1.5 - 15

FLD+ Lens 2.5 -
4.6 : 1 (EN44)

2.1-2.93

Yes 2.1-6.5

1.85

49.52-91.60

2.5-25

FLD+ Lens 0.75 -
1.13 : 1 (EN45)

2.4-3.29

Yes 2.4-6.5

1.51

15.85-23.93

5.0 - 30

FLD+ Lens 0.75 -
1.13 : 1 (EN46)

2.4-3.29

Yes 2.4-6.5

1.51

15.98-23.99

0.7 - 7

FLD+ NV Lens 0.8
- 1.21 : 1 (NV46)

2.4-3.29

Yes 2.4-6.5

1.51

15.98-23.99

0.7 - 7

FLD+ Lens 0.65 :
1 (EN47)

2.1

Yes 2.1-6.0

-

12.6

0.5 - 4.0

3.3

Replace a lens

Lens lever

The F90 lens mount and lens lever is designed to prevent damage to the lens board while providing an easy and stable lens change
procedure.

The lens lever, located at the bottom of the lens mount (ref. ) slides between two positions, far left (default position — locked) and
far right (unlocked).

Always close the projector shutter before attempting to remove or install a lens.

To do this, press the shutter button on the keypad or remote. The keypad button will illuminate red when the
shutter is closed.

Press the shutter button again to open the shutter and resume normal operation. The keypad button will
illuminate white when the shutter is open.

601–0400–00 F90–W13 18/08/2016

21

Summary of Contents for F90-W13

Page 1: ...F90 W13 User Manual 601 0400 00 00 18 08 2016 ...

Page 2: ...Barco Fredrikstad AS Habornveien 53 N 1630 Gamle Fredrikstad Norway Phone 47 6930 4550 Fax 47 6930 4580 Support Support fre barco com Visit us at the web www barco com Printed in N0 ...

Page 3: ...names mentioned in this manual may be trademarks registered trademarks or copyrights of their respective holders All brand and product names mentioned in this manual serve as comments or examples and are not to be understood as advertising for the products or their manufacturers Turkey RoHS compliance Türkiye Cumhuriyeti AEEE Yönetmeliğine Uygundur Republic of Turkey In conformity with the WEEE Re...

Page 4: ...y Barco being a component of the system or independent service will be deemed invalid provided the damage is not proven to be attributed to the absence of properties guaranteed in writing or due to the intent or gross negligence or part of Barco If the purchaser or a third party carries out modifications or repairs on goods delivered by Barco or if the goods are handled incorrectly in particular i...

Page 5: ...ion process 25 4 2 Installation conditions 25 4 3 Initial inspection 27 4 4 Positioning the projector 28 4 5 Mounting the projector 28 4 6 Throw distance 29 4 7 Scheimpflug Boresight adjustment 32 4 8 Scheimpflug adjustment procedure 33 5 Getting started 35 5 1 Projector source and control connections 35 5 1 1 Making connections 35 5 1 2 Connector specifications 35 5 1 2 1 Single link DVI 35 5 1 2...

Page 6: ...me 47 9 3 Service 47 10 Status menu 49 10 1 Source status 49 10 2 Product 49 10 3 Illumination 49 10 4 Communication 49 11 Reset Menu 51 11 1 Factory Reset 51 11 2 Selectable Reset 51 12 Cleaning the projector 53 12 1 Projector lenses 53 12 2 Projector cabinet 53 12 3 Filters 53 2 601 0400 00 F90 W13 18 08 2016 ...

Page 7: ...Such combination of projector and lens are intended for professional use only and are not intended for consumer use For RG3 no direct exposure to the beam shall be permitted For RG3 operators shall control access to the beam within the hazard distance or install the product at a height that will prevent eye exposure within the hazard distance This projector has two 2 built in Class 4 laser cluster...

Page 8: ...earthed via the supplied 3 conductor AC power cable If none of the supplied power cables are the correct one consult your dealer If you are unable to insert the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the purpose of the grounding type plug Never use 2 prong power cords as this is dangerous and could lead to electrical shock Do not allow anything ...

Page 9: ...should never be blocked by placing the projector too close to walls or other similar surface Allow for sufficient distance to walls and ceilings to avoid overheating Minimum safety distance to the exhaust area of the unit must not be less than 100 cm 40 and to the intake area not less than 50 cm 20 This projector should never be placed near or over a radiator or heat register This projector should...

Page 10: ...nters Attempts to alter the factory set internal controls or to change other control settings not specially discussed in this manual can lead to permanent damage to the projector and cancellation of the warranty Unplug this product from the wall outlet and refer servicing to Barco authorized service personnel or technicians under the following conditions If liquid has been spilled into the equipme...

Page 11: ...environments where unrestrained behavior is reasonably foreseeable the minimum separation height should be greater than or equal to 3 0 meter to prevent potential exposure for example by an individual sitting on another individual s shoulders within the HD These values are minimum values and are based on the guidance provided in IEC 62471 5 2015 section 6 6 5 The end user must understand the risk ...

Page 12: ...is can be done by using physical barrier like a red rope as illustrated in image 1 2 The restricted area sticker can be replaced by a sticker with only the symbol PR RESTRICTED AREA RESTRICTED AREA Image 1 3 1 6 Hazard Distance for fully closed projection system HD Hazard Distance HD is the distance measured from the projection lens at which the intensity or the energy per surface unit becomes low...

Page 13: ...r than any NOHD In the enclosed projection area the combination of two restricted zones are relevant The restricted zone of the projected beam toward the screen taking into account 1 meter Separation Width SW from the beam onward Combined with the restricted zone related to the rear reflection from the screen HDreflection also taking into account a 1 meter lateral separation The HDreflection dista...

Page 14: ...z vous reporter au manuel pour en savoir plus sur la liste des objectifs et la distance de sécurité avant toute utilisation De telles combinaisons entre projecteur et objectif sont conçues pour des applications professionnelles uniquement et pas pour des applications grand public ᵜᣅᖡᵪᆹ㻵ᣅሴ བྷҾ3 15Ⲵਟᦒ䮌ཤਾˈਟᡀѪRG3DŽ ࡽˈ䈧 㘳 ѝ䮌ཤ অ ড䲙 䐍 DŽ ᵜᣅᖡᵪо䮌ཤ㓴ਸӵ уъ ˈ䶎Პ䙊 䍩㘵 DŽ FOR NORTH AMERICA WITH USE OF INTERCHANGEABLE ...

Page 15: ...oints for collection of WEEE For details please visit the Barco website at http www barco com en AboutBarco weee WARNING This product contains chemicals including lead known to the State of California to cause birth defects or other reproductive harm Recycle properly do not dispose of in ordinary waste Turkey RoHS compliance Türkiye Cumhuriyeti AEEE Yönetmeliğine Uygundur Republic of Turkey In con...

Page 16: ...erials for this part is below the limit requirement in GB T 26572 X 表示该有毒有害物质至少在该部件的某一均质材料中的含量超出 GB T 26572 标准规定的限量要求 X Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the limit requirement in GB T 26572 在中国大陆销售的相应电子信息产品 EIP 都必须遵照中国大陆 电子电气产品有害物质限制使用标识要求 标准贴上环保使用期 限 EFUP 标签 Barco产品所采用的EFUP标签 请参阅实例 徽标内部的编号使用于指定产品 基于中...

Page 17: ... components Service and maintenance LED status light LCD panel Local keypad Wireless remote control Connector panel Color Wheels Optional accessories 2 1 Main components Naming conventions B R F L T Image 2 1 L Left T Top B Back R Right F Front 601 0400 00 F90 W13 18 08 2016 13 ...

Page 18: ...on the top side of the projector near the IR receiver ref 1 image 2 2 During normal operation the LED is unlit In the event of a critical error or high temperature the LED will display red By critical error the projector cannot be restarted until the projector is disconnected from the power supply and then reconnected again If the reason for the error persist the projector will again go to critica...

Page 19: ... pattern menu on OSD or in LCD 2 6 Wireless remote control General The projector remote control is a full feature wireless remote control powered by two 2 standard AA batteries The battery com partment is on the back side of the remote control The remote control is backlit for use in dark environments It also has a data jack that allows for wired connection to the projector When the wire is connec...

Page 20: ...power off Input Select input source Address Not in use Image 2 4 WARNING Laser radiation class II product wavelength 670nm maximum output 1mW Remote control complies with applicable requirements of 21 CFR 1040 10 and 1040 11 Remote control complies with applicable requirements of EN IEC 60825 1 2007 Specifications Parameter Value Type IR NEC protocol Sensors 2 Carrier 38 kHz Range 7m Laser 1 mW 67...

Page 21: ...es an extra boost to white segments and very good primary and secondary colors which makes it ideal for brightness critical applications The F90 is designed so that users can change the color wheel quickly and easily whilst on site without the use of special tools 2 8 2 Change the color wheel CAUTION The F90 contains no user serviceable parts except the Color Wheel Attempts to modify replace mecha...

Page 22: ...lace 8 Reinstall the three 3 captive screws of the CW cover 9 Replace the projector bottom cover and reinstall the seven 7 captive screws 10 Reposition the projector so that its bottom is sitting flat on a level surface 2 9 Optional accessories WARNING Always use Rigging Frame when the projector are installed outside a flat horizontal surface or being stacked together with several projectors Riggi...

Page 23: ...d R9801221 FLD Short Focus 0 8 1 21 1 EN46 approved approved R9801295 FLD 0 65 1 EN47 approved approved PN_EN58 FLD 0 28 1 EN58 approved approved This projector may become Risk Group 3 RG3 when an interchangeable lens with throw ratio greater than 3 15 is installed For Northern America installation requirements according to Risk group 3 RG3 must be followed when interchangeable lens with throw rat...

Page 24: ...3 2 48 1 2 0 15 FLD Lens 0 74 1 EN12 2 1 Yes 2 1 6 5 16 35 0 5 5 FLD Lens 1 24 1 6 1 EN13 2 1 2 22 Yes 2 1 6 5 1 3 25 59 33 24 1 0 15 FLD Lens 2 37 3 79 1 EN14 2 1 2 72 Yes 2 1 6 5 1 6 49 1 78 6 3 0 30 FLD Lens 1 16 1 EN15 2 1 Yes 2 1 6 5 23 98 1 5 15 FLD Lens 3 80 6 50 1 EN16 2 1 2 66 Yes 2 1 6 5 1 74 78 3 136 2 4 0 40 Available lenses 4K WUXGA WQXGA The FLD EN4X lens range is custom engineered f...

Page 25: ...4 1 5 15 FLD Lens 0 8 1 EN42 2 1 Yes 2 1 6 5 16 12 0 7 7 FLD Lens 1 2 1 7 1 EN43 2 4 2 7 Yes 2 4 6 5 1 42 23 95 34 02 1 5 15 FLD NV Lens 1 2 1 7 1 NV43 2 4 2 7 Yes 2 4 6 5 1 42 23 95 34 02 1 5 15 FLD Lens 2 5 4 6 1 EN44 2 1 2 93 Yes 2 1 6 5 1 85 49 52 91 60 2 5 25 FLD Lens 0 75 1 13 1 EN45 2 4 3 29 Yes 2 4 6 5 1 51 15 85 23 93 5 0 30 FLD Lens 0 75 1 13 1 EN46 2 4 3 29 Yes 2 4 6 5 1 51 15 98 23 99 ...

Page 26: ...op of the projector cabinet 5 Position the lens bayonet into the projector lens mount and support in place with one hand 6 Slide the lens lever to the far right 7 Verify that the lever is firmly in place at the far right end of the slide before removing your hand from the lens image 3 4 Image 3 4 Remove a lens 1 Support the lens with one hand 2 Use the other hand to push the lens release lever in ...

Page 27: ...iris adjustments are motorized You can use the remote control local keypad OSD and or RS 232 commands to adjust the lens zoom focus and iris positions Not all lenses have zoom or iris control The matrix below shows what controls are available per lens Iris will be available for future SW upgrades EN11 EN12 EN13 EN14 EN15 EN16 EN33 EN41 EN42 EN43 EN44 EN45 EN46 EN47 Iris Zoom Focus For best results...

Page 28: ...3 Lenses 24 601 0400 00 F90 W13 18 08 2016 ...

Page 29: ...ets all technical and environmental requirements Installation conditions page 25 2 Decide where the projector will be mounted Positioning the projector page 28 3 Unpack the projector and confirm that all equipment is present and in good working order Initial inspection page 27 4 Mount the projector Mounting the projector page 28 5 Install the projector lens Replace a lens page 21 6 Connect the sou...

Page 30: ...aph below 70 75 80 85 90 95 100 34 35 36 37 38 39 40 41 42 43 44 45 Light Output Ambient Temperature o C Rel Humidity 45 Rel Humidity 55 Rel Humidity 65 Rel Humidity 80 Image 4 1 Mains power requirements Projector Power requirements F90 110 240 V 50 60 Hz To protect operating personnel the National Electrical Manufacturers Association NEMA recommends that the instrument panel and cabinet be ground...

Page 31: ... receipt of the projector we recommend that customers inspect the projector for any signs of damage that may have occurred in transit If damage is found file a claim with the shipping carrier immediately Notify the Barco Sales and Service office or your preferred Barco agent of the damage as soon as possible Box Contents Your projector box should contain the following Projector unit Power cord sui...

Page 32: ...fset lens shift rather than physical angling to correct any off center positioning Minimize the source cable length as much as possible In general HDBaseT and 3G SDI are long haul interfaces and suitable for bespoke installations using relatively long cables DP HDMI and DVI are short haul interfaces using pre assembled cables with limited cable lengths Limit the use of power cable extensions where...

Page 33: ... to the desired location 3 Power up the projector 4 Go to Main Menu Installation Orientation and select the correct orientation for your setup See Orientation page 45 for more information 5 Go to Main Menu Test Patterns and select an internal hatch pattern to display on the screen 6 Adjust the position height and angle of the rigging frame until the projected hatch pattern is a level and perfect r...

Page 34: ... 32 1 EN11 2 0 15m FLD Lens 2 37 3 79 1 EN14 3 0 30m FLD Lens 3 80 6 50 1 EN16 4 0 40 m Image width m 12 00 11 00 10 00 9 00 8 00 7 00 6 00 5 00 4 00 3 00 2 00 1 00 0 00 Screen diagonal 0 00 1 00 2 00 3 00 4 00 5 00 6 00 8 00 9 00 10 00 11 00 12 00 13 00 14 00 0 00 0 50 1 00 1 50 2 00 2 50 3 00 4 00 4 50 5 00 5 50 6 00 6 50 7 00 7 50 3 50 Image 4 5 30 601 0400 00 F90 W13 18 08 2016 ...

Page 35: ...0 4 50 5 00 5 50 6 00 6 50 7 00 7 50 3 50 0 00 Image height F L D L e n s 0 8 1 E N 4 2 0 7 7 m FLD Lens 1 7 2 5 1 EN41 1 5 15m FLD Lens 2 5 4 6 1 EN44 2 5 25 m FLD Lens 1 2 1 7 1 EN43 1 5 15m FLD Lens 0 8 1 21 1 EN46 0 7 7m F L D L e n s 0 6 5 1 E N 4 7 0 5 4 m FLD Lens 0 8 1 21 1 EN45 5 30m 1 00 2 00 3 00 4 00 5 00 6 00 8 00 9 00 10 00 11 00 12 00 13 00 14 00 Image 4 6 601 0400 00 F90 W13 18 08 ...

Page 36: ...ment What is Scheimpflug The lens holder has to be adjusted so that the sharp focus plane of the projected image falls together with the plane of the screen Fp1 Fp2 This is achieved by changing the distance between the DMD plane and the lens plane Lp1 Lp2 The closer the lens plane comes to the DMD plane the further the sharp focus plane will be It can occur that you won t be able to get a complete...

Page 37: ...nly be carried out by properly qualified and experienced pro jection specialists A poor Scheimpflug adjustment may result in an extremely degraded image and will require factory servicing to the projector Necessary tools Allen key hex size 4 Allen key hex size 6 Preparation 1 Prepare the test area Barco recommends a projector screen distance of 2 metres be used for all Scheimpflug adjustments Veri...

Page 38: ...mage is still sharp If there are any deviations to sharpness repeat steps 2 to 6 until the image is correct 7 Tighten the three set screws in the following order left 1b right 2b and then top 3b Use a size 6 hex key to do this 1b 2b 3b Image 4 9 1 F Image 4 10 2 F Image 4 11 3 F Image 4 12 34 601 0400 00 F90 W13 18 08 2016 ...

Page 39: ...connections The source switching time varies from 0 5 to 5 seconds Source signal connectivity The connector panel at the back of the projector is used for all source connections Source signal connectivity on the projector is 2x Dual Link DVI I DVI D functionality 2x DisplayPort 1 2 1x HDMI 1 4 No 3D functionality 1x HDBaseT w Ethernet 2x 3G SDI 5 1 2 Connector specifications Overview Single link D...

Page 40: ...BR2 Scan format Interlaced or progressive Max input data resolution 1920x1200 60Hz WUXGA 60Hz Bit depth 8bit EDID Supported HDCP Not Supported 5 1 2 3 HDMI 1 4 No 3D functionallity Specifications Parameter Value Connector Standard HDMI Signal characteristics Digital TMDS Max cable length 15 m 24 AWG Max pixel rate 594MHz Scan format Interlaced or progressive Max input data resolution 1920x1200 60H...

Page 41: ...h Yes from Source to Projector CEC Pass Through Yes from Source to Projector IR Extension Not Supported RS 232 Extension Not Supported 10 100Mbps Ethernet Pass Through Not Supported Fallback to 100BaseTx IEEE 802 3u Not Supported USB Over Centre Tap Not Supported Power Over Ethernet Not Supported Audio Not Supported LEDs HD Base Status Operation Green Left Link Mode Yellow Right 5 1 3 Control inte...

Page 42: ...or using the keypad or remote 1 Connect the line cord to the projector 2 Plug the 3 pronged cord into a grounded AC outlet The projector will begin warming up 3 Press the power button on the keypad or remote to bring the projector up to standby mode The power button backlight on the keypad will flash blue while the projector is warming up 4 When the power button backlight is steady blue the projec...

Page 43: ... access for certified Service personnel A standard user has access to all projector functionality and OSD menu items A power user has in addition to access to all projector functionality and OSD menu items access to a number of advanced functions Access to power user features is password protected Contact your projector supplier for more information Navigation You can navigate the OSD using the lo...

Page 44: ... the total value To enter the value as a direct number press ENTER input the digit s and then Press ENTER again to execute and exit cursor mode e g ENTER 79 ENTER Changes to values are implemented dynamically Menu memory The OSD menu remembers the last selected sub item as long as the projector is running The menu memory is reset when restarting the projector from standby 40 601 0400 00 F90 W13 18...

Page 45: ... connectors The default selection of connectors displayed is DVI 1 DVI 2 DP 1 DP 2 HDBaseT HDMI SDI 6 2 Source configure About Source Configure This submenu allows users to review and configure advanced source settings Source Configure Edit source The Edit source submenu enables configuration of source composition Edit Source will be available for future SW upgrade The connectors can be arranged i...

Page 46: ...6 Source menu DVI 1 DVI 2 DP 1 DP 2 HDBaseT HDMI SDI 42 601 0400 00 F90 W13 18 08 2016 ...

Page 47: ...00 to 1 00 Default value 0 00 7 3 Saturation About Image Saturation Saturation levels impact on the white levels and the intensity of the color display the higher the value the more vivid the color display will be Available range 1 00 to 1 00 Default value 0 00 7 4 Advanced image adjustments About Image Advanced Advanced image adjustment settings that enable greater control particularly during cal...

Page 48: ... moved according to the specified desired coordinates White White point only No changes to RGBCMY Default White Native Native Colors Color Correction Off Native values System Setting Service Color Measured values The current measured values WRGB used for RealColor processing These values must be accurate for RealColor to perform correctly Current values are presented in the color gamut diagram Mea...

Page 49: ... to adjust zoom Use the navigational arrows left and right to adjust focus Shift Installation Lens Shift Use the left right up and down navigational arrows to adjust the lens shift in four directions 8 2 Orientation About Installation Orientation Rotate the image on the imaging device in table or ceiling and front or rear There are four options as illustrated below table front table rear ceiling f...

Page 50: ...o have a successful Warp correction the size of the screen must be entered The size are expressed in the X and Y measured values independent of the term of the measurement mm inches yards or whatever but must be expressed in whole numbers without decimals This means that the accuracy are higher when given in mm than in inches The projector then calculate the aspect ratio All four corners can be ad...

Page 51: ...c ON DHCP enabled OFF Static IP version 4 Static mode Set address subnet maks and default gateway according to network specification DHCP mode Assigned IP address subnet mask and gateway 9 2 Apply a menu theme About System settings Themes Themes are used to apply a predefined functionality to the OSD display There are two options light default or dark 9 3 Service About System settings Service The ...

Page 52: ...9 Settings menu 48 601 0400 00 F90 W13 18 08 2016 ...

Page 53: ... information Article number Projector article part number Serial number Projector serial number Firmware Projector software package version Model name Projector model name This is a status menu only No changes can be made to settings from this menu 10 3 Illumination About Status Illumination Shows the current laser power and laser runtime This is a status menu only No changes can be made to settin...

Page 54: ...10 Status menu Lists the projector IP address 50 601 0400 00 F90 W13 18 08 2016 ...

Page 55: ... Reset Enter Reset menu Select Factory Reset and confirm This will turn back all settings to factory standard 11 2 Selectable Reset Reset Enter the Reset Menu Select the items to be reset and Confirm This will turn the selected items to factory standard 601 0400 00 F90 W13 18 08 2016 51 ...

Page 56: ...11 Reset Menu 52 601 0400 00 F90 W13 18 08 2016 ...

Page 57: ...cloth then polish again with a dry cloth If smears occur when cleaning lenses replace the cloth Smears are the first indication of a dirty cloth 12 2 Projector cabinet WARNING Always disconnect the projector from the mains power net before attempting to clean the projec tor cabinet General guidelines for cleaning the projector cabinet exterior only Clean the housing of the projector with a damp cl...

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