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3M



Multimedia Projector MP8610

Troubleshooting



3M 1999

3-9

3-3-8.

Humming Noise. Slowly Passing Horizontal Bars

Probable causes are:

•

Signal sources are connected to different power sources.

•

VCR connected to aerial system and to projector.

•

Bad signal.

Possible solutions are:

•

Locate the source of disturbance. Disconnect the sources one after another from the projector.

Connect all

sources to a common power source.

•

Remove antenna connection from VCR. If the disturbance disappears, use a bypass filter (isolating
transformer) to connect the antenna to the VCR.

•

Try different input source.

3-3-9.

No Power. Power Shuts Off During Presentation

Probable causes are:

•

Power switch OFF.

•

Projector overheated.

Possible solutions are:

•

Turn on Power switch to projector.

•

Remove any objects blocking ventilation and allow projector to cool down. Power will return and projector
will be in Standby mode.MP8610 Message Table

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Содержание Multimedia Projector MP8610

Страница 1: ...MP8610 Multimedia Projector Service Manual 3M Visual Systems Division Printed in U S A 6801 River Place Boulevard 3M 5 99 78 6970 8987 4 Rev A Austin Texas 78726 9000 ...

Страница 2: ...ion 1 6 1 8 Lamp Alignment 1 7 1 9 Lamp Timer Information 1 9 1 10 Image Adustments 1 10 SECTION 2 DISASSEMBLY REASSEMBLY 2 1 Overview 2 1 2 2 Required Tools 2 1 2 3 Steps for Removing Projector Components 2 1 2 3 1 Remove Lens Cover 2 2 2 3 2 Remove Top Cover 2 3 2 3 3 Remove Fan Plenum 2 4 2 3 4 Remove Lamp Assembly 2 5 2 3 5 Remove Power Supply 2 6 2 3 6 Remove Interface Housing Assembly 2 7 2 ...

Страница 3: ... 3 3 3 No Video Image Projected 3 7 3 3 4 Mouse Does Not Work 3 8 3 3 5 Image Off Center 3 8 3 3 6 Cannot Get Entire Image on the Screen 3 8 3 3 7 Washed Out Image 3 8 3 3 8 Humming Noise Slowly Passing Horizontal Bars 3 9 3 3 9 No Power Power Shuts Off During Presentation 3 9 SECTION 4 THEORY AND DIAGRAMS 4 1 Overview 4 1 4 2 Section Contents 4 1 4 3 Theory of Operation 4 1 4 4 Color Theory 4 2 4...

Страница 4: ...P8610 are very sensitive to static energy A simple static charge can ruin a circuit board instantly Because of this it is essential that you complete all repairs in a static safe work environment 1 2 1 Static Safe Work Environment A properly grounded floor mat table mat and adjustable wrist strap with grounding cord are needed for complete static protection 3M recommends any of the following works...

Страница 5: ...to connect the original disassembled power supply with the interface board LCD Alignment Tool Used to check that the LCD alignment is at an 8 degree angle Backlight Light Source Used to check the disassembled LCD unit without the original machine lamp source Voltmeter Used to measure the voltage at particular test points 3M recommends the Fluke model 87 Oscilloscope 100 MHz Used to check the video...

Страница 6: ...ress and hold both the Enter button and the Down Arrow button on the control panel 2 Turn the main power switch to on The default settings are restored and the following message appears Parameter Factory Settings Restored Resetting a projector to its default factory setting may resolve a no input detected error message for an RGB or video input device ...

Страница 7: ...ion image Remove any dust from the outside of the projection lens with a lint free cloth If dust remains on the projection image the LCD panel needs to be cleaned 1 6 2 Cleaning the Dust from LCD If dust particles can be seen on your projection image 1 Turn off the main power switch of the projector and unplug the power cord 2 Remove the LCD module assembly Refer to the appropriate Disassembly Rea...

Страница 8: ...ng up 3 Insert the other end of the new ribbon cable into the interface board connector The blue side of the cable should be facing down 4 Lock the white plastic clamps into place on both the LCD connector and the interface board connector 5 Use the old cable as a pattern to place the appropriate bends in the new cable If a connector clamp is broken 1 Order a complete connector DY 0205 1512 7 2 Re...

Страница 9: ...ct the interface board to the power board with the Service Interface Cable DY 205 1500 1 7 Place a cover over the power supply board to prevent damage or injury Because the power supply board is fully energized in the next step it is essential that a cover is placed over the board to prevent injury 8 Power up the projector 9 Measure the voltage of pin 9 on the test block This connector is nearest ...

Страница 10: ...endicular to the condenser lens 3 The lamp should be aligned using the reflection image on the lamp reflector The image of the lamp should be slightly above or slightly below the lamp 4 If not this position can be changed by turning the two adjustment screws below the lamp sockets 5 Verify the lamp alignment by powering up the projector and viewing the image of the lamp on the screen This can be d...

Страница 11: ...rings under the lamp socket If the arcs are too close the lumen output will be reduced If the arcs are to far apart the image uniformity will be affected 2 Verify the lamp alignment by powering up the projector and viewing the image of the lamp on the screen by holding a triplet lens in front of the projector lens 3 Repeat the above two steps until the lamp is aligned correctly ...

Страница 12: ...menu item Lamp is Green the lamp is good When the bar turns red or the projection image appears dark the lamp and air filter should be replaced 1 9 1 Reset the Lamp Timer 1 Under the Option sub menu select the sub menu item Lamp and press Enter 4 Follow the instructions in the Help Window 5 Press the Enter button and the Up Arrow button on the control panel for confirmation ...

Страница 13: ...ntrol Stick on the remote control to select the Palette sub menu item 12 Press the left right Arrow buttons on the projector or the Control Stick on the remote control left right to reduce the chromatic resolution from the default that is 16 7 million colors to 64 13 Press the up down Arrow buttons on the projector or move the Control Stick on the remote control to select the Pixels sub menu item ...

Страница 14: ...s the up down Arrow buttons on the projector or move the Control Stick on the remote control to select the Tracking sub menu item 6 Press the left right Arrow buttons on the projector or move the Control Stick on the remote control left right to reduce the amount of interference 7 The direction of adjustment is correct when the number of lines decreases The setting is optimal when no interference ...

Страница 15: ...Press the left right Arrow buttons on the projector or move the Control Stick on the remote control left right to reduce the amount of fuzziness or flicker in the projection image An automatic setting of synchronization can be called up by pressing the Enter button 7 Complete fine adjustments to the brightness and contrast settings if minor interference still remains Press the Menu button to exit ...

Страница 16: ...rd before performing any maintenance to electrical components To avoid burns to fingers allow projector lamp and internal projector components to cool off prior to lamp removal or disassembly 2 2 Required Tools An entire disassembly and reassembly can be completed with the following tools Phillips screwdriver 1 magnetic long shaft Standard screwdriver 3 16 in or in blade T 15 Torx Driver T 20 Torx...

Страница 17: ... before performing any maintenance to electrical components To avoid burns to fingers allow projector lamp and internal projector components to cool off prior to lamp removal or disassembly 1 Remove two 2 screws from the bottom of projector 2 Remove the lens cap 3 Slide the lens housing forward to remove 4 Reassemble in reverse order Caution WARNING ...

Страница 18: ...ff prior to lamp removal or disassembly Remove the lens cover 1 Remove two 2 screws from the top cover 2 Lower the carrying handle for screw access 3 Remove two 2 screws 4 Pry out the small cap from the top cover hinge assembly 5 Loosen the hinge screw 2 full revolutions 6 Pull out the hinge assembly while pushing against the loosened hinge screw 7 Repeat steps 4 5 6 for the top cover hinge assemb...

Страница 19: ...nts to cool off prior to lamp removal or disassembly Remove the lens cover and top cover 1 Disconnect the fan connector 2 Remove two 2 screws securing the temperature sensor 3 Remove the screws for the fan plenum A To remove the lamp cooling fan only Remove the screws shown as 3A two 2 per side B To remove the fan plenum Remove the fan screws shown as 3A and the plenum screws shown as 3B two 2 per...

Страница 20: ...op cover and fan plenum Note Use gloves when handling optical components to prevent finger printing 1 Remove two 2 screws from the lamp housing cover and remove cover Lamp cover is already removed in photo 2 Remove the two 2 light shields by pulling them up and out of the lamp assembly 3 Remove two 2 connectors from the power supply 4 Remove the ground wire 5 Remove four 4 torx head screws from th...

Страница 21: ...e the lens cover top cover and fan plenum 1 Remove two 2 lamp leads from the power supply board at the fan end 2 Disconnect three 3 fan connectors in a block at the end opposite the cooling fan Note The three fan cables are parallel connected and do not need to be placed back into the exact same connector 3 Disconnect the 10 pin PCB interface connector 4 Disconnect two 2 ground cables attached to ...

Страница 22: ... projector components to cool off prior to lamp removal or disassembly Remove the lens cover top cover lamp assembly fan plenum and power supply 1 Remove two 2 interlocks 2 Remove three 3 screws from the interface housing assembly cover 3 Remove the cover 4 Disconnect three 3 cable connectors 5 Slide the ribbon cable back and release the connector gold tab side up for ribbon cable reassembly 6 Rem...

Страница 23: ...embly Reassembly 3M 1999 2 8 8 7 7 Disconnect the ribbon cable from the control panel 8 Remove one 1 screw from the upper left corner of the interface housing assembly 9 Remove the interface housing assembly 10 Reassemble in reverse order ...

Страница 24: ...projector lamp and internal projector components to cool off prior to lamp removal or disassembly Remove the lens cover top cover lamp assembly fan plenum and power supply 11 Disconnect the ground connector 12 Remove three 3 screws from the interface housing assembly cover 13 Remove the cover 14 Disconnect three 3 cable connectors 15 Slide the ribbon cable back and release the connector gold tab s...

Страница 25: ...7 8 9 16 Remove two 2 screws from the LCD assembly on the fan assembly side 17 Remove two 2 screws from the other end of the LCD assembly 18 Lift up the LCD assembly and thread the ribbon cable through the ferrit 19 Remove the LCD assembly 20 Reassemble in reverse order ...

Страница 26: ...the lens cover and top cover 1 Remove one 1 screw to remove the light cover from the LCD assembly 2 Remove three 3 screws to remove the LCD bracket from the LCD assembly 3 Remove the front and rear fresnel lens by pulling straight up Handle each fresnel lens with extreme care 4 Lift out the polarization filter the glass component between lamp side fresnel lens and LCD Note When installing a new po...

Страница 27: ...ior to lamp removal or disassembly Remove the lens cover and top cover 1 Place a protective cover over the lens 2 Disconnect two 2 speaker wires 3 Loosen the nut and thread the setscrew out 4 Slide the speaker up and remove a magnet is holding the speaker to the bracket Note When reinstalling the speaker there are two 2 screws on the side of the bracket for speaker alignment 5 Disconnect the cable...

Страница 28: ... general problems section 3 2 Direct Failure Troubleshooting Flow Charts The troubleshooting flow charts listed in this section start with the basics and move forward They are designed to be used for solving direct failure problems The following problems can be resolved using the troubleshooting flow charts Projector Does Not Power Up Lamp Does Not Light Projection Image Problems LCD Not Functioni...

Страница 29: ...Is the LCD switch fully engaged Is the fuse on the power supply functioning properly Is the lamp access door closed completely Projector Does Not Power Up Close the lamp access door Close top cover reopen completely Adjust switch position replace switch if faulty Replace fuse Replace the power supply Yes Yes Yes Yes Yes No No No No ...

Страница 30: ...3M Multimedia Projector MP8610 Troubleshooting 3M 1999 3 3 3 2 2 Lamp Does Not Light ...

Страница 31: ...3M Multimedia Projector MP8610 Troubleshooting 3M 1999 3 4 3 2 3 Projector Image Problem ...

Страница 32: ... properly functioning Is the interface board powering the LCD Does the menu screen appear when the projector is powered on LCD Not Functioning Refer to Projector Does Not Power Up Check input device and cabling Replace pinched or broken ribbon cables Check connections Replace interface board if needed Replace the LCD unit Yes Yes Yes Yes Yes No No No No ...

Страница 33: ... wires connected and functioning Is the audio board receiving power from the power supply Is the audio input device connected properly No Sound Check input device cabling and input device Replace speaker Reconnect repair or replace wires as needed Check connections and cabling Replace the audio board Yes Yes Yes Yes Yes No No No No ...

Страница 34: ...tup menu for optimum performance 3 3 2 No Computer Image Projected Message No input detected is shown Probable causes are Loose cable No power to computer Wrong synchronization mode Possible solutions are Check and secure cable connections Turn on computer Adjust synchronization mode of the projector to the synchronization mode of the computer via Option menu 3 3 3 No Video Image Projected Probabl...

Страница 35: ...formance 3 3 6 Cannot Get Entire Image on the Screen Probable causes are Wrong Tracking value Compatibility problem Wrong pixel setting Possible solutions are Refer to the documentation of your graphic card The projector supports the resolutions that can be found under Pixel in the Setup menu Adjust the Pixel setting in the Setup menu to the resolution of the video mode output from the computer gr...

Страница 36: ...om the projector Connect all sources to a common power source Remove antenna connection from VCR If the disturbance disappears use a bypass filter isolating transformer to connect the antenna to the VCR Try different input source 3 3 9 No Power Power Shuts Off During Presentation Probable causes are Power switch OFF Projector overheated Possible solutions are Turn on Power switch to projector Remo...

Страница 37: ...s to light Low voltage DC current is sent to the power unit circuit then to the Micro processor to power the rest of the projector 4 3 2 MP8610 Video Input and AD Conversion There are two sets of video inputs Switching between them is done using the input button on the top of the projector or the Video1 2 button on the remote control Signal Board The video signal passes though the video signal sel...

Страница 38: ...trol Signal Board The RGB signal goes through a RGB1 2 signal selector then the chroma signal C information is sent to the video RGB selector and the luminal signal Y information is sent to sync selection Driver Board Refer to driver board information for video RGB Out RGB out simply takes the information in its analog state and passes it through an amplifier to the terminal out Additional electro...

Страница 39: ... measurable wavelength or combination of wavelengths The wavelengths of light are not colored but produce the sensation of color 4 4 2 Electromagnetic Spectrum All wavelengths of light are part of the electromagnetic energy spectrum The spectrum is a continuous sequence of energy waves that vary in length from short to long Visible light the wavelength that our eyes can detect is only a small port...

Страница 40: ...ht to pass through the pixels Shades of gray are obtained by inputting voltages that fall between full off no voltage and full on full voltage The cells are refreshed at the speed of 1 60th of a second and are sensitive to high temperatures 4 5 2 How Light Passes Through An LCD Polarized light entering the cells from the rear is aligned so that it will pass the light through the polarizer on the o...

Страница 41: ...e bulb is capable of producing 550 lumens of uniform brightness across the entire projection image The metal halide bulbs should never be touched When oil from your skin touches the bulb it provides a focal point for the lamp energy The lamp burns hotter at that location and eventually burns through the bulb prematurely ...

Страница 42: ...angle is greater than sixteen degrees As the front of the projector is raised the projection angle increases At sixteen degrees the projection image is still square and in focus at nineteen degrees keystoning can be seen The MP8610 is keystone corrected at a ratio of 3 9 to 1 to provide a square focused image as shown Restated for every 3 9 feet of projection distance the image is raised 1 foot Th...

Страница 43: ...ows light waves at the right angle to pass through Hot Mirror Heat management device that passes the light and reflects heat IR and UV light Cold Mirror Reflector Heat management device that reflects the light and passes heat IR and UV light LCD Panel Positions the liquid crystal cells that form an image Cold Mirror IR and UV Light Lamp Condenser Lens Lamp Side Fresnel Hot Mirror LCD Lens Side Fre...

Страница 44: ...3M Multimedia Projector MP8610 Theory and Diagrams 3M 1999 4 8 4 9 Connection Diagrams Electrical diagrams provide a visual representation of how the projector circuitry is connected ...

Страница 45: ...3M Multimedia Projector MP8610 Theory and Diagrams 3M 1999 4 9 4 10 Wiring Diagrams Wiring diagrams provide a visual representation of how the projector is wired ...

Страница 46: ...rnal cable failure problems 4 11 1 Interface Board Connector Locations Power Supply Connector J10 Pin 1 of the connector is the black cable and pin 10 of the connector is the red cable 1 2 5 Volt 3 5 Volt 4 12 Volt 5 12 Volt 6 7 Ground 8 Lamp on 5Volt TTL high Lamp off 0 Volt TTL Low 9 Dimmer Standard 0 Volt TTL low Economy 5 Volt 10 Fan on 5Volt TTL high Fan off 0 Volts TTL low ...

Страница 47: ...r MP8610 Theory and Diagrams 3M 1999 4 11 4 11 2 Audio Board Connector Locations Video Out J1 This connector joins the audio and interface boards Video In J2 Allows for video input from the interface board to the audio board ...

Страница 48: ...media Projector MP8610 Theory and Diagrams 3M 1999 4 12 4 12 Computer Video Audio Connections The information provided in this section is for reference purposes Each type of cable is shown with a pinout diagram ...

Страница 49: ...3M Multimedia Projector MP8610 Theory and Diagrams 3M 1999 4 13 ...

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