1. Join Now

    AVForums.com uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Vertical Banding on Sony CX1 with ROMv1.01

Discussion in 'Projectors, Screens & Video Processors' started by SoftLion, Nov 12, 2001.

  1. SoftLion

    SoftLion
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    Can this be a ROM version issue ?

    I have the same banding problem since the first day
    (august 2001).
    Is it a "settings" problem ?

    The Factory menu says the ROM version is 1.01
    Someone on the uk.media.home-cinema newsgroup told me
    he has no banding problem but ROM version 1.02.

    I've asked Sony for the differences between these versions
    but currently have no reply.

    What ROM version do you have ?
    What should I do to get rid of these bands ?
    Anyone had the pb and found a solution ?

    Thanks,
    B
     
  2. samwiley

    samwiley
    Standard Member

    Joined:
    Mar 15, 2001
    Messages:
    84
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    6
    Location:
    London
    Ratings:
    +0
    My ROM version is 1.02 - so that can't be the problem.

    I have managed to minimise the banding by playing aroung with the RGB settings.

    I've only just started to play with these so I doubt if I have found the optimum settings, but these are my current setting for what it's worth!.

    Try them and see if your projector image is improved.

    Contrast - 63
    Brightness - 33
    Sharp - Min

    GAIN
    R - 71
    G - 66
    B - 64

    BIAS
    R - 132
    G - 125
    B - 128

    If anyone has any comments/suggestions on other values they have tried I'd be really grateful :)
     
  3. Timh

    Timh
    Well-known Member

    Joined:
    Sep 14, 2000
    Messages:
    4,817
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    86
    Location:
    Altair-4
    Ratings:
    +140
    I remember someone discussing this problem on an earlier post, someone commented that it could be reduced by using a mains conditioned power cable, see here the YellO power cable maybe the one you are after, maybe someone else could comment.

    My Brother had a CX1 for a short while and his suffered from the vertical banding.
     
  4. jrwood

    jrwood
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    Sounds like the problem with the power supply cable, try changing it?. I have no types of problem that you describe (rom 1.02 btw).

    Sam did you take a note of the default settings of the CX1 as I seem to have misplaced both the low/high settings I wrote down grr.

    I'll try your settings and I`ll post some settings probably tomorrow which you could try out, although the way I tweaked it Im not sure if it gives a better picture or not really!. However it does help with dark scenes alot.

    James
     
  5. jrwood

    jrwood
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    Ok Ive posted my settings in a different thread so the many other CX1 owners here can try it out :)

    James
     
  6. SoftLion

    SoftLion
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    I'm becoming to think it's a hidden default
    on some easly versions of this projector,
    and that I should make Sony replace it.

    It's nothing to do with the power cord nor the inputs
    (I tried all 3 types of inputs).
    The "bands" do not move, are vertical,
    1 cm large, are visible only for colors that
    have a RGB component near 128
    ie: 0,128,0 128,0,0 0,128,0 128,128,0 ...
    The effect decreases and disappears completely
    for plain colors (255,255,255).

    A "band" is a vertical space where the color is
    darker than its neighbour band (which seems lighter).
    There are only 2 tints for the bands on the whole image,
    and the darker bands are interlaced with the lighter ones.

    It seems that the effect shows progressively while
    the projector is heating, but I have to verify that.
     
  7. jrwood

    jrwood
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    Are you using the little stand at the back of the projector?, if you are putting the projector flat on the floor with no ventilation, you will start to see a yellow blob!.

    Can you post a picture/examples?, but it sounds like you have a faulty unit and should speak to your local supplier about a replacement.

    James
     
  8. SoftLion

    SoftLion
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    I'm using the little thing at the back
    so the projector should not overheat.

    I've also some fan noise.
    Can I replace it with some computer-like silent fan ?
    Is it a standard 12V one ?

    Thks,
    SL.
     
  9. jrwood

    jrwood
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    Someone posted a while ago that you could change the fan, in fact he gave information about the fans which come from france so maybe a particular type of fan will work.

    However when I get some time I might build a hush box although to be honest the noise doesnt bother me the the large room I view in and the sound drowns the projector out completely!.

    James


    p.s are you using a grey screen?, you get far better blacks with this projector using a grey screen or buying some MDF (£15 or so) and some ICESTORM 5 paint from say B&Q (see DIY section) or here for previous discussions on this type of screen. Saves paying a fortune for a commercial screen when the results are just as good.
     

Share This Page

Loading...