Marquee Anamorphic Modification

Discussion in 'Projectors, Screens & Video Processors' started by Mad Mr H, Dec 28, 2006.

  1. Mad Mr H

    Mad Mr H
    Well-known Member

    Joined:
    Jun 10, 2005
    Messages:
    4,460
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    106
    Location:
    London
    Ratings:
    +280
    As always if you decide to do these modifications yourself , you must be happy you know what you are doing and accept that there is a risk of damage to your projector if not correctly modified.

    This document was written by "Tim in Phoenix" - Many thanks for the information.

    You can all add your thanks to Tim using the "Thanks" button at the bottom of post 3 in this thread.

    I consider this modification to have a difficulty rating of 1/10 - Easy basic electronic and soldering skills required.


    Marquee Anamorphic Mods

    On newer Marquees, the Vertical Deflection Module is located on the rear heat sink behind the blue CRT (see PIC 1). The mod requires a phillips screwdriver, soldering tools, and three 56k ohms, 1/4w, 5% resistors. Remove the Marquee's top gray metal covers and remove four phillips screws across the top of the rear heat sink, which should permit you to open the rear heat sink on its' hinge; do not allow the yoke wires to be pulled or stressed. Locate R704, R804, and R904 on the vertical board, they are close to the yoke molex pins and should be marked orange, black, orange to denote 30k ohms. Remove these three resistors (see PIC 2), this can usually be done without pulling the board from the heat sink. Take care not to damage the foil traces of the PC board. Form he 56k resistors into U shapes with short leads (see PIC 3), and solder them into the places where the 30k ohm resistors were located (see PIC 4). Reassemble the unit with covers, and power up the unit. Next, go into UTIL, 9 and enter the passcode 0901 for the Service menu, select 3, and match red and blue raster heights to green so as to place the least load on dynamic convergence. Touch up geometry and convergence as needed and the mod is complete.
     

    Attached Files:

  2. Mad Mr H

    Mad Mr H
    Well-known Member

    Joined:
    Jun 10, 2005
    Messages:
    4,460
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    106
    Location:
    London
    Ratings:
    +280
    Here is another version of this I found on the web,I can not credit the original Aurthor as I dont know who it was...............

    Replace the existing resistors (30KOhm) on the Vertical Deflection Board marked R704, R804 and R904. The Vertical Deflection Board is placed at the back of the PJ.

    To access it you have to;

    1. Remove the front top cover
    2. Undo the two screws that hold the top cover
    3. Push the top cover back a few centimeters (from the lenses) and lift the top cover
    4. Undo the the two screws on top of the back panel and four screws under the back panel and remove the back panel.
    5. Then undo the two screws on top of the aluminium thermal sink and turn the sink back.
    6. If you now stand behind the projector the Vertical Deflection Board is the one on your right side in the sink.

    If you inspect the board you see that, to dismount the board you have to;

    1. Dismount two flatcables
    2. Dismount three 4-connectors that comes from each of the tubes
    3. Dismount three 4-connectors that comes from the right side of the PJ
    4. Dismount the Earth
    5. Dismount four metal clamps (or springs) that holds the board against the aluminium sink

    Before you dismount, take notes on every connector where it sits and oriention (I wrote an simple drawing to be safe)

    6. Push the board carefully to the right (separate it from the left board). Be careful to not damage the vertical components on the side of the sink and take it out

    Before you replace them check this first to be on the safe side;

    1. Doublecheck that you have a Vertical Deflection Board marked BD 50-2330-02P.
    2. Doublecheck that you localized the three 30 KOhm resistors marked R704, R804 and R904 on the board. They should be marked with the following colorcode; Orange/Black/Orange/Silver that means they are 30 KOhm (Orange=3, Black=0, Orange=3 zeros = 30000 Ohm and the last color of silver means 10% tolerance)

    After you have have desoldered and replaced the resistors. just reverse the order for mounting the board
     
  3. Tim in Phoenix

    Tim in Phoenix
    Active Member

    Joined:
    Dec 2, 2005
    Messages:
    82
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    8
    Location:
    Phoenix Arizona
    Ratings:
    +8
    Hello

    The first (top) version is from the E-Tech website, in Tech Tips. Wrote it meself.
     
  4. Mad Mr H

    Mad Mr H
    Well-known Member

    Joined:
    Jun 10, 2005
    Messages:
    4,460
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    106
    Location:
    London
    Ratings:
    +280
    Hi Thanks for that info Tim,

    Im not that up to speed with Marquee Projectors.........

    Tims Site can be found here

    http://www.etechvideo.com/techtips.htm

    There are other Marquee related items there well worth reading.

    Credit will be added to Original post :smashin: .
     

Share This Page

Loading...