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Sony 1270Q CRT Setup And Operation Manual

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Sony 1270Q Setup and Operation Manual
Wes Hill
February, 2002
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  • Page 1 Sony 1270Q Setup and Operation Manual Wes Hill February, 2002...

  • Page 2: Table Of Contents

    Sony 1270Q CRT Projector Setup Manual. Table of Contents: 1. Thoughts and Experiences with the Sony 1270Q 1.1. Scan Lines and Resolving Power 1.2. Refresh Rate 1.3. Screen Size 2. Projector Setup 2.1. Mechanical Setup 2.1.1. Throw Distance 2.1.2. Mount Setup 2.1.3.

  • Page 3: Scan Lines And Resolving Power

    Sony 1270Q, or the entire 12xx series, can resolve. The resolving power of a CRT PJ is controlled by a lot of factors, but the principal factor on the Sony 1270Q is the electron beam focus. The electron beam is focused by 2 sets of magnets, a 2 pole set and 4 pole set.
  • Page 4 Ideal Situation (0 overlap, 0 gaps) Scan Line Excessive Scan lines (overlap) Scan Line Overlap Some people prefer this “soft” picture, but I have found that 600P-666P looks very sharp and 3 dimensional. Keep in mind that when displaying 16:9 material, you are using a smaller phosphor area than a 4:3 image and therefore can resolve 25% less scan lines.

  • Page 5: Refresh Rate

    When I first ran my Sony 1270Q at 48Hz, it was the first time I had really seen the 3D effect that I hear people with higher end projectors speak of.

  • Page 6: Screen Size

    Screen Size The output of the Sony 1270Q is noted to be 650 lumens, or about 200 ANSI lumens. ANSI refers to a measurement standard, eliminating the bogus values you sometimes see in literature. I’ve read that a screen brightness of 10-12 foot lamberts is a good value to shoot for, giving good brightness in a light controlled environment.

  • Page 7: Mechanical Setup

    PJ for whatever screen width you desire. The consensus with most Sony 12xx owners, the people who set them up and me is that 80” wide is about as big as you should go, without sacrificing brightness and sharpness.

  • Page 8: Mount Setup

    Measure the distance from the green tube to the screen or wall, this is your projection distance. 2.1.2. Mount Setup This second order of business is to get the projector pointing in the right direction. There are a few parameters which need to be addressed. The PJ needs to be pointing perpendicular to the screen horizontally and vertically, if a standard setup is being used.

  • Page 9: Crt Mechanical Setup

    2.1.3. CRT Mechanical Setup An important part of the setup process is getting the CRT’s all centered at the same point on the screen. My method of doing this is to pull all of the lenses off of the PJ. Next, place some scotch tape on the CRT face along the center of the face in both directions.

  • Page 10: 2/4 Pole Adjustment

    likely see that the tubes do not line up at all. The green tube is your point of reference and should not be moved at any time. The red and blue tubes need to be pointed so that the centers of the cross hairs line up as closely as possible.
  • Page 11 The 2 – Pole Magnet Adjustment select an input with nothing attached get in service man mode press RESET and set contrast to max and brightness to 50 press test and get to the crosshair pattern cut off the CRT’s that you aren’t adjusting rotate the focus slightly counter clock wise from perfect focus adjust the 2 –...
  • Page 12 CRT PJ Focus by Me, Wes Hill I’ve focused my PJ as best as I can…well for a while anyway. I’ve gotten it so that I can distinguish the individual dots of the internal focus test pattern (little H’s) on all tubes and in all corners. This has translated into seeing scan lines at 1184 x 666, even in the corners.
  • Page 13 The idea is to more accurately point the Red and Blue CRT’s (CRT Angle) so that these crosshairs line up without any electrical adjustments. Second, the optical assembly must be placed at such an angle (Lens Angle) that the light travels equidistant to the screen from left to right. Top to bottom adjustment is handled within the optical assembly but we can improve on that too.
  • Page 14 What I have done is replace the spacer with bolts and nuts at each corner. The drawing above should give a good graphical description of this. Essentially, by turning these bolts in and out you can adjust each corner of the lens individually.
  • Page 15 The following is a drawing of the “Goggle Flappers”. Sony 1270Q Lens Flapping Adjusters (Scheimpflug) "Goggle Flappers" 25.00 5mm. Lock Nut (Teflon insert) The thickness of the nut must be somewhat less than the spacer you removed. This will ensure that the proper amount of adjustment is possible.
  • Page 16 2. With all of the lenses removed, install the nuts and bolts. Install them on the lens, leaving the tiniest bit of play so that the lens case tabs can move slightly without having to flex. 3. Start with the installation of the green tube. Have someone help you install these as you’ll only be able to thread each bolt in a few turns at a time.

  • Page 17: Convergence

    PJ. The second is for a particular input/bandwidth. The memory structure of the Sony PJ’s is such that it automatically saves the convergence for a range of bandwidths, for example 21 – 31 kHz. Any image refresh /...
  • Page 18 resolution combination that results in a bandwidth in this range will have that convergence information applied to it. It is very important to get as good of an initial convergence as possible without using the zone controls. This will lead to a more stable convergence in the long run.
  • Page 19 Make about 6 or 8 marks with a sharpy on each of the lines, measured a constant distance from the edge of the screen. It’s really hard to see your blue test pattern on blue tape, hence the marks ;-) Since you have the crosshairs test pattern up, hit the cut off for red and blue.
  • Page 20 red tube are on, cutoff the blue. Now adjust the red in the same order you did the green. You want to have a yellow grid. If you find that you can’t get a corner, try to balance that with another corner, you know, try to split up the problem over two areas, this way you require less ZONE convergence.

  • Page 21: Setting The G2 Adjustments

    Setting the G2 Adjustments I’ve taken these notes from 2 threads b/w Eric van Ballegoie and Chuck Williams. With this set up properly my picture got a lot better. It’ amazing how black the blacks can be with the screen still being bright. Sure makes DLP’s look funny ;-) Keep in mind that your grey scale will be messed up after you do this so continue knowing that it’ll have to be reset.

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