Service Manuals, User Guides, Schematic Diagrams or docs for : MITSUBISHI Proj TV V16 chassis V16_Chassis

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V16_Chassis


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                             Chapter 1
                        Service Procedures
Servicing models in the V16 chassis family is similar to previous Mitsubishi projection
televisions. This chapter will familarize the service technician with:

                                 Cabinet Disassembly Procedures
                                 Lightbox Removal Procedures
                                 PCB Functions
                                 PCB and Major Parts Locations

For actual service, please refer to the Service Manual for more complete information, in-
cluding the Safety Precautions and Product Safety Notice.




                                        Page 1-1
Page 1-2
                        CABINET DISASSEMBLY (FRONT VIEW)

VS-50805 / VS-60805 / WS-55805




                                               Figure 1-1
   1. Front Cabinet Disassembly
    1.   Remove the Speaker Grille by pulling forward.
    2.   Remove the Board Front by removing 4 screws (a).
    3.   Remove the 3 screws (b) holding the Screen Assembly.
    4.   Lift the Screen Assembly up and away from the cabinet.




                                                 Page 1-3
                        CABINET DISASSEMBLY (FRONT VIEW)

WS-55905 / WS-65905 / WS-73905




                                               Figure 1-2

   1a. Front Cabinet Disassembly
    1.   Remove the Cover Front and the two Speaker Grilles by pulling forward.
    2.   Remove 2 screws (a) to remove the Control Panel.
    3.   Remove the Board Front by removing 4 screws (b).
    4.   Remove the 4 screws (c) holding the Screen Assembly.
    5.   Lift the Screen Assembly up and away from the cabinet.




                                                 Page 1-4
                        CABINET DISASSEMBLY (FRONT VIEW)

WT-46805




                                               Figure 1-3

   1b. Front Cabinet Disassembly
    1.   Remove the Speaker Grille by pulling forward.
    2.   Remove 2 screws (b) to remove the Control Panel.
    3.   Remove the Board Front by removing 4 screws (a).
    4.   Remove the 4 screws (c) holding the Screen Assembly.
    5.   Lift the Screen Assembly up and away from the cabinet.




                                                 Page 1-5
                          CABINET DISASSEMBLY (REAR VIEW)

VS-50805 / VS-60805 / WS-55805 / WS-55905 / WS-65905 / WS-73905




                                               Figure 1-4
 2. Rear Cabinet Disassembly
  1.   Remove 12 screws (a) holding the Back Board.
  2.   Remove the 4 screws (c) holding each Board Shelf.
  3.   Remove the 4 screws (b) securing the Light Box Assembly.
  4.   Slide the Light Box out the rear of the Cabinet.




                                                 Page 1-6
                         CABINET DISASSEMBLY (REAR VIEW)

WT-46805




                                              Figure 1-5
   2a. Rear Cabinet Disassembly
    1.   Remove 15 screws (a) holding the Back Board.
    2.   Remove the 13 screws (b) holding the Back Cover.
    3.   Remove the 3 screws (d) securing each Board Shelf.
    3.   Remove the 4 screws (c) securing the Light Box Assembly.
    4.   Slide the Light Box out the rear of the Cabinet.




                                                Page 1-7
    PCB Functions and Locations                                        PCB-RGB
Figure 1-6 shows the location of all PCBs attached        Red, Green and Blue Signal Processing
to the main chassis. The primary functions of each        DTV/DVD Signal Selection
PCB are listed below.
                                                                       PCB-POWER
                  PCB-SIGNAL                              Standby Power Supply
     NTSC Tuning                                          Convergence Output Amps
     uPC Control                                          Vertical Output Amp
     Low Voltage Regulation                               Interface for stand up PCBs
     NTSC/SDTV Switching
     Interface for stand-up PCBs.                                PCB-DEFL-JUNGLE
                                                          Horizontal and Vertical Deflection Drive
              PCB-TERMINAL
     Audio and Video Inputs                                        PCB-CONV-GEN
     DTV Interface                                        Convergence and Raster Geometry Correction
     Audio/Video Switch                                   Signal Generation
     Audio signal processing                              High Voltage Adjustment Generation
                                                          Dynamic Focus Signal Generation
                PCB-AUDIO                                 Cross Hatch OSD Generation
     Audio Output Amplifier
                                                                        PCB-MAIN
            PCB-YCS / DECODER                             On-Off Power Switching
     NTSC Luminance/Chroma Separation                     Switched Power Supply
     NTSC Chrominance Demodulation                        Horizontal Deflection
     Matrix to YCrCb                                      High Voltage
                                                          Interface for stand up PCBs
               PCB-PIP/SCALAR
     PIP Processing                                                PCB-DEFL-MINI
     Picture Size and Aspect Ratio Control                High Voltage Regulation Comparison
                                                          X-Ray Protection Comparison
              PCB-DOUBLER
     Line Doubling                                                     PCB-DBF
                                                          Corner Focus Correction




                                               Page 1-8
     Figure 1-6: PCB Locations




Figure 1-7: Main Component Locations

              Page 1-9
Page 1-10



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