Ricoh KW5708 Service Training Download Page 48 | Manualshive

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Slide 48

Terms and Definitions - 1



Aspect Ratio



This is the ratio of the horizontal to vertical dimensions of
the screen. For a normal television, the aspect vratio is 4:3.
For HDTV, it is 16:9. For SXGA, it is 5:4.



Resolution



This is expressed as the number of dots across the image
versus the number of dots down the image. the larger the
number, the higher the resolution.



Here are the resolutions of some common video graphic
standards.

» VGA (Video Graphic Array): 40 x 480
» SVGA (Super VGA): 800 x 600
» XGA (Extended Graphic Array): 1024 x 768
» WXGA (Wide VGA): 1280 x 800
» SXGA (Super XGA): 1280 x 1024
» UXGA (Ultra XGA): 1600 x 1200

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Summary of Contents for KW5708

Page 1: ...Slide 1 Y0AS Y0AT Y0AV Y0AY Y0AZ Y0B0 Y0BC Service Training Mizar PJ2 Version 1 0...

Page 2: ...PJ WX5461 PJ KW5700 KW5708 4100 lumens WXGA resolution Mizar PJ2 cx Y0AS Y0AY PJ X5461 PJ X5300 4000 lumens XGA resolution Mizar PJ2 HD Y0AV Y0B0 PJ HD5451 PJ HD5900 3800 lumens 1080P resolution It i...

Page 3: ...4000 3500lm Resolution WXGA XGA 1080P XGA WXGA 1080P Contrast Dynamic eco 10000 1 Dynamic eco 10000 1 Weight 3 0kg 3 0kg Lamp life 3000H 4000H eco 3000H 4000H eco Keystone Vertical horizontal vertical...

Page 4: ...when mounted on a ceiling This product is designed for user maintenance Regular on site maintenance is not needed There is no display panel but LEDs show the symptoms for troubleshooting blinking lit...

Page 5: ...Slide 5 Low Energy Consumption 3 000 hour lamp life in normal mode and 4 000 hour in Eco mode 0 5W power consumption in standby mode...

Page 6: ...with Mizar PJ1 260W mercury lamp Life 3 000 hours normal mode 4 000 hours Eco mode There may be a 50 decrease in brightness at the end of the lamp s life 3D glasses Y107 Will also be usable with other...

Page 7: ...ailure Rate 1st year 0 0024 cases unit month 2nd year 0 0029 cases unit month 3rd year 0 0036 cases unit month The failure rate of a projector increases with its total power up time This is due in par...

Page 8: ...ccurs when the machine calculates that the life time has expired End alert will appear 30 hours in Normal mode before suggested replacement of lamp If the user switches between modes the machine calcu...

Page 9: ...vapour These lamps can rupture due to impact or being used longer than their life expectancy The time that the breakage will occur differs widely for each lamp and its circumstances of use These lamp...

Page 10: ...Slide 10 10 Overview External View...

Page 11: ...Slide 11 11 Overview Connection Ports...

Page 12: ...Slide 12 Operation Panel...

Page 13: ...Slide 13 Connection Ports PJ hdl 1 2 3 4 5 6 7 8 9 10 1 S Video IN 2 Computer IN 3 HDMI 2 4 HDMI 1 5 Service port 6 PC Control D sub 9 pin 7 LAN 8 Audio Out 9 Audio IN 10 Video IN...

Page 14: ...nductor chip Light shone on the DMD chip is reflected by all these tiny mirrors For a chip with 1024 x 768 resolution there are 786 432 small mirrors Light is shone onto the chip through a fast spinni...

Page 15: ...the beam path and similarly for the green and blue signals The DMD chip generates the R G and B images by re positioning the micromirrors using micromachined hinges to make different pixelated images...

Page 16: ...nd processing DMD board DMD BD Image signal processing and DMD control LVPS DC DC Power supply passes signals between boards LVPS means Low Voltage Power Supply Lamp driver Ballast Starts the lamp Whe...

Page 17: ...Slide 17 Service Training Basic Points about Service...

Page 18: ...Slide 18 Swap and Repair This product is intended for swap and repair If the projector needs repairs it is taken away from the customer site and a temporary replacement is provided to the customer...

Page 19: ...Slide 19 Antistatic Clothing To protect the components from damage wear anti static clothing when you disassemble the machine...

Page 20: ...d vice versa w_y058m0152 Keypad board Top cover unit Lens cap Lamp cover Adjustable foot Lamp module Lamp housing Optical system unit Speaker Start IR sensor board Control panel Zoom ring Lamp cable T...

Page 21: ...er the service mode press Power Left Left Menu Note You can use the remote controller for this For the list of functions in the service mode see System Maintenance Test Inspection Service Mode Service...

Page 22: ...Slide 22 LED Display...

Page 23: ...eplaced Whenever you replace a component check this table to see if you have to do any of these procedures The text in the Replacement and Adjustments procedures does not always refer to this table Ac...

Page 24: ...Slide 24 Replacing the Lamp To replace the lamp unplug the power cord and then wait for 60 minutes...

Page 25: ...board contains a record of the lamp usage hours If you have to change the main board make a note of the lamp hours before you remove the board Then use Rewrite Lamp Hours after you install the new bo...

Page 26: ...e for each model The lenses are different for a start Make sure that you have the correct assembly for the model that you are working on The optics engine contains the DMD board DMD chip lens and rod...

Page 27: ...Slide 27 Replacing the Color Wheel Avoid touching the glass parts of the color wheel...

Page 28: ...Slide 28 Color Wheel Index Adjustment Do this after replacing the color wheel Also do this adjustment if color appears abnormal after changing the main board...

Page 29: ...Slide 29 Rod Adjustment Adjust if there are yellowish or bluish parts in the image...

Page 30: ...Slide 30 OSD Reset Select the 3rd button from the top in the main menu Then select Reset in the sub menu This returns all adjustments and settings to the factory settings Main Menu Sub Menu Settings...

Page 31: ...n the service mode For the procedure see System Maintenance Functional Tests Burn in Test in the service manual The lamp on and off durations can be set before starting the test This procedure takes a...

Page 32: ...Slide 32 Service Training Updating Firmware...

Page 33: ...Slide 33 Updating the System Firmware 1 Equipment needed Software DLP Composer Lite 11 2 Firmware img 11 2 FlashDeviceParameters Hardware Projector Power cord USB Cable mini USB to USB A PC or Laptop...

Page 34: ...Power LED lights pink and Lamp Temp LEDs light red release the Power button Connect the Projector to the PC Use a mini USB cable Update the firmware Use DLP Composer Lite The procedure takes several...

Page 35: ...Slide 35 Background Information Types of Projectors...

Page 36: ...red LCD projectors These use three LCD filters to create red green and blue images DLP projectors DLP Digital Light Processing was developed by Texas Instruments It uses micro mirror devices and rota...

Page 37: ...37 CRT Projectors These use three cathode ray tubes blue green and red They have better contrast than LCD and DLP projectors They also have good resolution But they are bulky heavy and difficult to a...

Page 38: ...red part of the image one the green and one the blue In this way each LCD holds a pattern of pixels Then red light is shone through the LCD with the red part of the image and green and blue light are...

Page 39: ...ight shone on the DLP chip is reflected by all these tiny mirrors For a chip with 1024 x 768 resolution there are 786 432 small mirrors Light is shone onto the chip through a fast spinning wheel that...

Page 40: ...rates the R G and B images by re positioning the micromirrors using micromachined hinges to make different pixelated images for each colour meaning that each micromirror has an ON and an OFF position...

Page 41: ...hese semiconductors and beams of light are reflected off these and recombined before being projected to the screen LCD projectors give bright high resolution high contrast output and they are easy to...

Page 42: ...Slide 42 Background Information Polarization...

Page 43: ...of the electric field It is convenient to think in terms of up down vertical and left right horizontal If the polarization is at an angle then this polarization can be thought of as having up down and...

Page 44: ...ent to pass through but not the left right component Think of a rope passing through a picket fence with vertical slits If you vibrate the rope in a horizontal direction the fence will block the vibra...

Page 45: ...larized parallel to the plane of incidence in other words horizontal it is said to be p polarized If the field is polarized perpendicularly to the plane of incidence vertical it is said to be s polari...

Page 46: ...ances can polarize light If the angle is correct different for each mineral depends on the arrangement of molecules in the mineral the reflected light will be completely s polarized The refracted ligh...

Page 47: ...Slide 47 Background Information Terms and Definitions...

Page 48: ...s 5 4 Resolution This is expressed as the number of dots across the image versus the number of dots down the image the larger the number the higher the resolution Here are the resolutions of some comm...

Page 49: ...ght waves oscillate in the same way as sound waves If the waves oscillate in one plane only the light is said to be polarized Light reflected by a polarizing screen is polarized and is brighter than l...

Page 50: ...n the air filter Do not operate the projector without the filter The message will appear the first time the user switches the power on after the 100 hour limit has been reached The message will stay o...

Page 51: ...rts are not supplied with the projector Changing the Lamp The first time that the power is turned on after the lamp has been used for 3000 hours a message is displayed for the user The message disappe...

Page 52: ...s measured The average of these is taken to be the brightness of the source in lumens Lux lx This is a measure of the intensity of illumination It can be expressed as lumens square meter Outside on a...

Page 53: ...between white and black are called gradations The higher the number of gradations the greater effect on the image but if the contrast is not high this effect is cancelled Color Separation A computer v...

Page 54: ...al light source is unaffected by external light sources gives a high contrast image that is clear Jitter Flickering Jitter is noise in the image that is mainly caused by temporary fluctuations in the...

Page 55: ...LCD panel The image settings reverse ceiling depend on how the projector is set up The following settings from the image adjustment menu can be used to adjust the projected image Contrast weak strong...

Page 56: ...tion the projected image will be distorted into a trapezoidal shape instead of a rectangular shape The projector contains a sensor that detects the angle of projection in 15 degree increments and the...

Page 57: ...he screen the darker it is If you choose a screen with a higher gain the brightness is preserved to some extent Also choose a screen to suit the room In a long room use a high luminance screen In a wi...

Page 58: ...s is a compression technology to facilitate the storage and transmission of still colour images The data is reduced in a manner that is not visible to the eye but a compression of 1 100 is achieved MP...

Page 59: ...Slide 59 Throw Ratio Throw Ratio PD SW...

Page 60: ...Slide 60 Optical Axis Projection Screen DMD Active Area a b B A Projection Lens Offset Offset A B B x100 a b b x100...

Page 61: ...Slide 61...

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