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    Moderated By: claudio
    Agoraquest Forum Index Television Configuration
      
    Brightness difference, DVI vs Component on KV34XBR910 Dashboard
    Replies: 5 | Views: 1,398
    Last Reply: June 4, 2005, 9:27 pm

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    rjih | jehill | andyross | SummitHDTV | kentech |
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    Author Brightness difference, DVI vs Component on KV34XBR910
    rjih

    Rank: Sony Buff


    Joined: Jan 02, 2003
    Posts: 23
    From: Atlanta, GA

      Posted: 2005-06-03 08:52

    I have noticed that when using the DVI input the displayed brightness of the picture is significantly higher than with component cables. The comparison was made using the DVI and component outputs on a Dish Network DVR921 and a LG LST4200A HD tuner. Different DVI and component cables were tested and the results were the same. There are no separate adjustments for DVI (Video7) and Component (Video 5 & 6) in the user menu.


    Does anyone know if there is a separate adjustment in the service menu that would allow me to reduce the brightness only on the DVI input?



       


    andyross

    Rank: Sony Legend


    Joined: Mar 09, 2004
    Posts: 1093
    From: Schaumburg, IL

      Posted: 2005-06-03 17:01

    There are separate sub-adjustments in the service menu.

    2170P-3/UBOF is brightness (black-level) and is separate for different video modes (480i, 480p, etc..), in addition to inputs (sorted RF, Vid1-4, Vid5-6, DVI, MemStick) It is further broken down by picture mode (Vivid, Standard, Movie, Pro). This is an 'offset' adjustment, allowing you to fine tune. It doesn't offer alot of adjustment. UCOF and UHOF are related Color and Hue offsets.

    2170P-4/SPIC is Picture (white level) offset. It's only set per input as above (I think all 480i may use the same setting), not per video/picture mode. There is also SCOL and SHUE, which allow you to adjust color and hue per input, without all the super-fine tuning in 2170P-3.


    -----------------
    Sony KDL-46EX700, Onkyo TX-NR609, Sony BDP-S370, WDTV Live Streaming, Motorola DCT-6412, RCA RCRP05B.


         
    kentech

    Rank: Sony Enthusiant


    Joined: Mar 11, 2005
    Posts: 45
    From: Portland, OR

      Posted: 2005-06-03 20:58


    • Member Quote

    On 2005-06-03 17:01, andyross wrote:
    2170P-4/SPIC is Picture (white level) offset. It's only set per input as above (I think all 480i may use the same setting), not per video/picture mode. There is also SCOL and SHUE, which allow you to adjust color and hue per input, without all the super-fine tuning in 2170P-3.





    rjih: by "brightness" I assume you mean the total picture brightness (what is varied by the Picture slider, not the Brightness slider), not just black level.

    It seems to me that 2170P-4 #1 SPIC might be the best place to start, as it neatly isolates HDMI from other input sources (MS/Tuner, component, and DRC-processed sources). If the implication of its name is correct (sub-Picture), then it uniquely adjusts the video gain for that input, modifying the scope of the Picture slider. The brightness offset adjustment in 2170P-3 #13 UBOF shold be avoided unless it's the *black level* you wish to adjust; it doesn't affect Picture (how bright the whites are).

    (Note: I haven't had to do this yet.)

    Don't switch to a different input after making an SPIC change without first saving the setting, as you may lose the setting. That's usually what happens when you switch "columns" in the service-data table, here one column representing one input-type.


    -----------------
    KenTech


       
    rjih

    Rank: Sony Buff


    Joined: Jan 02, 2003
    Posts: 23
    From: Atlanta, GA

      Posted: 2005-06-04 09:40

    Thanks for the information. I decreased 2170P-3/UBOF from 1 to 0 and increased 2170P-4/SPIC from 7 to 10.
     
    There was an ISF calibration done on the set shortly after purhase. At the time all of my devices used component connections and those are the inputs the technician used for the calibration. I wonder if that is what created the disparity between Component and DVI.


       
    jehill
    Premium Member

    Rank: Sony Senior Advisor


    Joined: Mar 13, 2003
    Posts: 14283
    From: Sewell, NJ

      Posted: 2005-06-04 14:38

    That would be a resonable assumption.

    -----------------
    -John

    Sony A/V System: KDL-55XBR8, BDP-S550 and AVD-LA2500PKG, consisting of AVD-C70ES Super Audio CD/DVD Receiver, 4 SS-LA500ED surround speakers, 1 SS-LAC505ED center channel speaker and 1 SA-WD200 Active Subwoofer


       
    SummitHDTV

    Rank: Sony Enthusiant


    Joined: Feb 26, 2005
    Posts: 27
    From: Southeast Michigan

      Posted: 2005-06-04 21:27






    On 2005-06-04 09:40, rjih wrote:
    Thanks for the information. I decreased 2170P-3/UBOF from 1 to 0 and increased 2170P-4/SPIC from 7 to 10.
     
    There was an ISF calibration done on the set shortly after purhase. At the time all of my devices used component connections and those are the inputs the technician used for the calibration. I wonder if that is what created the disparity between Component and DVI.


    Since you were only using component video at the time of the ISF calibation, the tech likely didn't calibrate the DVI input.  The disparity was created OOB by Sony.  It's knowledgeable users and ISF Techs that calibrate all the used inputs. 

    Although I own a different Sony set, there was a huge difference in the user controls (brightness, contast, color, etc) between component video and DVI.

    -----------------
    Summit HDTV
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