3M MP8670l Service Manual
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3M MP8670l Service Manual

3M MP8670l Service Manual

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Service Manual

MP8670/8745/8755/8770 Multimedia
Projector
Warranty and Limited Remedy. This product will be free from defects in material and manufacture for a period of
two years from the date of purchase. 3M MAKES NO OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective
within the warranty period stated above, your exclusive remedy shall be, at 3M's option, to replace or repair the 3M product or
refund the purchase price of the 3M product.
Limitation of Liability. Except where prohibited by law, 3M will not be liable for any loss or damage arising from this
3M product, whether direct, indirect, special, incidental or consequential regardless of the legal theory asserted.
3M Visual Systems Division
6801 River Place Boulevard
Austin, Texas 78726-9000
_______________________________________________________________
E. P. S. Service Documentation
Copyright © 2000, 3M IPC. All Rights Reserved.
78-6970-8985-8

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Summary of Contents for 3M MP8670l

  • Page 1: Service Manual

    IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or refund the purchase price of the 3M product.

  • Page 2: Table Of Contents

    Theory of Operation............................ 4-1 Color Theory ............................... 4-3 LCD Structure Theory ..........................4-4 Lamp Theory............................... 4-5 Optical System Layout..........................4-6 Block Diagram ............................4-7 Main PWB Wiring Diagram ........................4-8 Optical Unit Wiring Diagram........................4-9 Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 3: Section 1 Adjustments

    To avoid incorrect adjustments, verify the model MP8670/8745 is located on the back of the and version of the projector prior to making any projector. adjustments. Different versions have unique adjustment requirements. The serial number for Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 4: Technical Tools

    Generator be used for all advanced adjustment procedures. Use for white balance adjustments. 1-4-2. Chroma Meter 3M recommends the Minolta™ CL100 Chroma Meter or equivalent. Use for white balance adjustments. 1-4-3. Phillips Screw Drivers (#1 Magnetic Long Shaft) Use for component disassembly and reassembly.

  • Page 5: Cleaning Lcd Panels

    If dust still remains complete steps 1-4 again. 40 PSI. 3. If dust is still visible wipe the LCD panels with a chamois swab or a lint-free cloth from the 3M LCD cleaning kit. Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 6: Convergence

    5. Position the projector so that the projection image is approximately 70 inches diagonally with the W-Zoom button on the remote control set to Max. 6. Press the Menu button on the remote Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 7 5. If convergence is outside acceptable tolerance, the entire assembly must be replaced. No convergence adjustment is possible. Acceptable Tolerance is: • 1 pixel off at center of screen, • 1.25 pixels off at outside edge of screen. Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 8: White Balance

    5. Turn off the projector, then plug in the video test generator to the RGB terminal jack. 6. Program the voltage settings for each input color into the video test generator. Refer to the video test generator user's guide for further assistance. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 9 No. are adjustment points from 1 to 33 • In each point you can adjust W, R, G, & B • Once selected, the list appears at the bottom of the screen. 6. Under DAC-P the following will appear. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 10 3M™ Multimedia Projector MP8670/8745/8755/8770 Adjustments 7. Under S/H, the following will appear. 8. Under SPECIAL, the following will appear. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 11 3. If there is jitter, change S/H – S/H POL, in the adjustment Menu, from POSI to NEGA or NEGA to POSI. 4. Return S/H – S/H TIMING to the value obtained in step 1. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 12 √ √ Note The frame is displayed in three steps at this stage. Adjust only the center step. Colors may appear in vertical stripes in some cased. Copyright © 2000, 3M IPC. All Rights Reserved. 1-10...
  • Page 13 Alignment Adjustment Procedure: 4. Display Ghost Test Pattern. 5. Use S/H – GHOST (R) to adjust so that the Red Ghost is at a minimum. Copyright © 2000, 3M IPC. All Rights Reserved. 1-11...
  • Page 14 3M™ Multimedia Projector MP8670/8745/8755/8770 Adjustments 6. Display Ghost Test Pattern. 7. Use S/H – GHOST (G) to adjust so that the Green Ghost is at a minimum. Copyright © 2000, 3M IPC. All Rights Reserved. 1-12...
  • Page 15 3M™ Multimedia Projector MP8670/8745/8755/8770 Adjustments 8. Display Ghost Test Pattern. 9. Use S/H – GHOST (B) to adjust so that the Blue Ghost is at a minimum. Copyright © 2000, 3M IPC. All Rights Reserved. 1-13...
  • Page 16 (60) timing sugnal to input a 0.35V p-p , G primary color Signal for every other line. 5. Use DAC-P – V.COM-G from the adjustment Menu to adjust Flicker to a minimum. 6. Use a SVGA (MP8670) or XGA (MP8745) VESA Copyright © 2000, 3M IPC. All Rights Reserved. 1-14...
  • Page 17 (60) timing signal to input a 0.35V p-p , B primary color Signal for every other line. 7. Use DAC-P – V.COM-B from the adjustment Menu to adjust Flicker to a minimum. Copyright © 2000, 3M IPC. All Rights Reserved. 1-15...
  • Page 18 6 or 12 dots. 4. If streaks are still displayed, use S/H – S/H TIMING in the adjustment menu until vertical streaks are at a minimum. Copyright © 2000, 3M IPC. All Rights Reserved. 1-16...
  • Page 19 SUB BRIGHT – B in the adjustment menu to adjust color coordinates in the center of the screen to the following: X = 0.280 ± ± 0.005 Y = 0.340 ± ± 0.01 (Low brightness white level) Copyright © 2000, 3M IPC. All Rights Reserved. 1-17...
  • Page 20 BLACK2 GAIN – B in the adjustment menu to adjust color coordinates in the center of the screen to the following: X = 0.270 ± ± 0.03 Y = 0.320 ± ± 0.03 (Black white balance) Copyright © 2000, 3M IPC. All Rights Reserved. 1-18...
  • Page 21 3. Do not adjust point #1 because the brightness of the entire screen will be changed. 4. Only adjustment points #2 and #3 can be adjusted for the color green (G). Copyright © 2000, 3M IPC. All Rights Reserved. 1-19...
  • Page 22 • x = x1 • y = y1 √ √ Notes x value is adjusted with “R” y value is adjusted with “B” Adjust “B” first then “R” for each Value Copyright © 2000, 3M IPC. All Rights Reserved. 1-20...
  • Page 23 9. Measure and adjust the color coordinates of Points 3 through 9 in the same way. • x3 - x9 = x1 ± 0.01 • y3 - y9 = y1 ± 0.01 Copyright © 2000, 3M IPC. All Rights Reserved. 1-21...
  • Page 24 Points 11 through 17 in the same way. • x11 – x17 = x1 ± 0.01 • y11 – y17 = y1 ± 0.02 13. This completes the normal color uniformity adjustment. Copyright © 2000, 3M IPC. All Rights Reserved. 1-22...
  • Page 25 The following are visual color uniformity checks and adjustments for color uniformity of the periphery. 15. Adjust points 18 through 21 to achieve color uniformity. Copyright © 2000, 3M IPC. All Rights Reserved. 1-23...
  • Page 26 The following are visual color uniformity checks and adjustments for color uniformity of the corners. 17. Adjust points 22 through 33 to visually achieve color uniformity in the corners. Copyright © 2000, 3M IPC. All Rights Reserved. 1-24...

  • Page 27: Section 2 Disassembly/Reassembly

    RGB Input Board • Lens LCD Assembly • Dichroic Optics Unit • Ballast • PWB Signal Board • DC Power Fan • Exhaust Fan If performing a complete disassembly, record lamp time. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 28 3. Remove one (1) black screw on side of projector. 4. Remove two (2) screws above the carry handle on side of projector. 5. Open air filter door and remove one (1) screw in upper left corner of fan bracket. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 29 3M ™ Multimedia Projector MP8670/8745/8755/8770 Disassembly/Reassembly 6. Carefully lift front of top cover to the open position. 7. Remove ribbon cable at circuit board and release wire from plastic wire manager. 8. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 30 14. Carefully lift main board upward to remove. √ √ Note The main board has a plug-in type connector that inserts Driver Board into the driver board below. 15. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 31 Remove top cover and main drive board. 1. Locate the service board. 2. Remove one (1) wire connector. 3. Remove one (1) screw securing board. 4. Remove plastic spark shield located under board. 5. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 32 2. Remove one (1) screw securing circuit board. 3. Remove two (2) screws securing metal brace and circuit board. 4. Carefully lift board upward to remove from base. 5. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 33 RGB input board bracket to bottom of projector base. 4. Press down on signal circuit board (4a) and carefully lift RGB input board (4b) upward to disconnect and remove. 5. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 34 1. Remove three (3) screws securing dichroic unit to projector base. 2. Disconnect wire connector. 3. Carefully lift upward to remove dichroic unit from projector base. 4. Reassemble in reverse order. D ichroic U n it Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 35 2. Remove six (6) screws securing lens to the projector base. 3. Carefully lift the lens assembly upward to separate it from the dichroic unit. 4. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 36 3. Remove one (1) screw securing metal clip. 4. Remove metal clip and unplug wire connector leading to the lamp module. 5. Carefully remove ballast from projector body. 6. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved. 2-10...
  • Page 37 1. Remove RGB input board. See Section 2-3-5. 2. Disconnect white wire connectors. 3. Remove one (1) screw securing signal board. 4. Carefully remove signal board. 5. Reasemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved. 2-11...
  • Page 38 These screws are different sizes. The short screw (1a) is on the left and the longer screw (1b) is on the right. 2. Carefully remove fan. 3. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved. 2-12...
  • Page 39 Remove top cover. 1. Remove one (1) screw securing metal bracket. 2. Remove bracket. 3. Remove fan wire connector and remove fan 4. Reassemble in reverse order. Copyright © 2000, 3M IPC. All Rights Reserved. 2-13...

  • Page 40: Section 3. Troubleshooting

    3M™ Multimedia Projector MP8670/8745/8755/8770 Troubleshooting 3. Troubleshooting This section provides flowcharts to aid in troubleshooting the 3M™ MP8670/8745 Multimedia Projector. 3-1. Troubleshooting Checkpoints The following troubleshooting checkpoints that will help you diagnose problems. Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 41: Power Cannot Be Turned On Flowchart

    Disconnect CHK0023 = L EDI1 on the Main PWB Main PWB ETEP from Main PWB. at Standby Retry Turn On? Mode. 28 : (CHK0023) = H (H = 2.5V) Temperature Main PWB Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 42: Lamp Does Not Light Flowchart

    Try again. LIMIT SWITCH (LAMP) Continued on Next LIMIT SWITCH Page (LAMP DOOR) Measure Voltage at the CHK0082 (EDS1) on the Main PWB Standby Mode. Power More Than 12.5V Unit (Circuit) Main PWB Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 43 EBAF on the Main PWB and Retry. DC FAN (EXHAUST) Short between Pin 1 and 3 of EINF on the Main PWB and Retry. DC FAN (INTAKE) Main 3 Fans have Rotation Sensors Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 44 6, 7 : (CHK0035) : G signal 2, 3 : (CHK0037) : B signal : (CHK010) : H sync : (CHK011) : V sync Signal RGB Input Power Unit Terminal PWB (Circuit) Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 45 49 : (CHK002) : VIDEO. R signal 47 : (CHK004) : VIDEO. G signal 45 : (CHK006) : VIDEO. B signal 36 : (CHK012) : VIDEO. H sync 35 : (CHK013) : VIDEO. V sync Main PWB Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 46 : (CHK075) : H sync : (CHK074) : V sync 15, 66 : (CHK055) : CLK Drive LCD Module Assembly 1 - Signal PWB generates separate 5V reg for Main PWB and RGB PWB Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 47 Output at Pins 8, 10 of EVS1 PWB Input Terminal VIDEO on the Main PWB VIDEO Input Terminal? Audio L 10 Audio R Signal No Sound - Both RGB and VIDEO Signal Input Signal Power Unit Speaker (Circuit) Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 48: Cannot Control Mouse Or Rs232C Flowchart

    Main PWB? 26 (CHK0019) : Mouse 24 (CHK0020) : TXD 23 (CHK0021) : RXD Main PWB RS232C PS/2 Serial Pin No. DATA DATA SEL0 SEL0 SEL0 SEL0 SEL1 SEL1 SEL1 SEL1 Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 49 Can Not Control USB Mouse Can Not Control USB Mouse Is the Voltage at Pin 26 Main PWB (CHK0019) of EDI1 on the Main PWB set to "H"? RGB Input Terminal PWB Copyright © 2000, 3M IPC. All Rights Reserved. 3-10...

  • Page 50: Signal Waveforms Of P501, P601, And P704

    2 1 ~ p i n 2 8 H C P 100nS V D A T A 100nS p in 30, 31 SIG 1,2 2V ~ 5V p in 8 VCP, pin 9 VCP 7.5V 2C ~ 5V 12.5V Copyright © 2000, 3M IPC. All Rights Reserved. 3-11...
  • Page 51 3M™ Multimedia Projector MP8670/8745/8755/8770 Troubleshooting Signal Waveforms of P501, P601, and P701 (Input Signal is VGA3), Continued pin 30, 31 SIG 1,2 4.5V 7.5V 4.5V Copyright © 2000, 3M IPC. All Rights Reserved. 3-12...

  • Page 52: Section 4 Theory And Diagrams

    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. Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 53 RGB out simply takes the information in its analog state and passes it through an amplifier to the terminal out. Additional electronic image smoothing occurs in the gate array of the MP8670/8745. 4-1-3. MP8670/8745 Circuitry Diagram Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 54: Color Theory

    At the other end of the visible spectrum are the longer wavelengths of light we perceive as red. All other colors are found somewhere along the spectrum between blue and red. Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 55: Lcd Structure Theory

    If 100% of the red light is emitted through the blue light is blocked entirely, a light brown red LCD panel and 50% of the green light screen is projected. makes it through the green LCD panel and the Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 56: Lamp Theory

    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. Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 57: Optical System Layout

    Allows both horizontal and vertical light waves, at the right angles, to (Polarizer) pass through. LCD Panel Positions the liquid crystal cells that form an image. Multi-Lens One lens divided into sections to act as many. Copyright © 2000, 3M IPC. All Rights Reserved.

  • Page 58: Block Diagram

    3M™ Multimedia Projector MP8670/8745/8755/8770 Theory and Diagrams 4-6. Block Diagram Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 59 4-7. Wire Diagrams Copyright © 2000, 3M IPC. All Rights Reserved.
  • Page 60 4-7. Wire Diagrams Copyright © 2000, 3M IPC. All Rights Reserved.

This manual is also suitable for:

Mp8745Mp8770Mp8755Mp8670

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