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    Identifying a panel

    My KDS K-22MDWB monitor went belly up last week. It wasn't a big surprise, for the last month when it came out of standby the lower part of the screen had a pinkish glow. When it started 'Two Seconds to Black', it was time to swap in another monitor.

    Opening up the KDS wasn't too hard, getting into the LCD panel was a different matter but eventually I succeeded. Sure enough, one of the CCFLs has an unhealthy pink glow, the other three are pure white. After some measurements it seems the CCFLs are 2.2 mm in diameter and 475 mm long. CCFLwarehouse has them at $9.95 each ($8.00 if I order through eBay). Of course, I'm going to need kapton tape, o-rings, wire, etc. The problem is while my mechanical skills are adequate at the macro level, they are lacking at this level. I'd have to order at least 6 CCFLs to have a chance of getting 4 in. Or I could have them rebuild the assemblies; that would cost about $90, probably more than a 22" monitor is worth; certainly when I can buy a new 22" wide screen monitor for $129.

    The LCD panel has the following information: Proview Technology Company Limited. Model PV220WLCM Product # M220Z1-P01. Googling that information led me to the information that M220Z1-P01 is a Chi Mei (AKA CMO) part number, and the panel is also used in an Element TV. Further digging found this auction on eBay, which would be an acceptable solution. The picture appears to match the CCFL assemblies in the KDS monitor. I have contacted the seller for information on the dimensions of the assemblies; he has not responded. Not his guarantee isn't very good - the CCFLs are guaranteed to work in any monitor they work in.

    Questions: From the picture below, is this a CMO panel? What panel is used in the HP W22 monitor?

    Details not obvious in the pictures: The channel is 19.25" long, 9/16" wide, and 5/16 high.

    PlainBill
    Attached Files
    For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

    #2
    Re: Identifying a panel

    Originally posted by PlainBill View Post
    What panel is used in the HP W22 monitor?
    Funny, I fixed a HP w2207 on May 11, 2010 exactly one year ago (the date code on my pics). Unfortunately, out of all the pics I took, only 1 shows the panel and it is at an angle. It isn't quite legible, but I included it for the people who can manipulate it and get better focus.

    The best I can make out is

    LM220WE1 (that 0 could also be a 6)
    LG Philips LCD
    Made in Korea

    Hope that helps.

    I remember taking it apart was a real PITA so I would rather not do it again unless you really need a better picture.

    For bonus points, here is the datasheet from

    Attached Files
    Last edited by retiredcaps; 05-11-2011, 10:30 PM.
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    Comment


      #3
      Re: Identifying a panel

      panels in LCD monitors are usually interchangeable, as long as the resolution and connector matches. did this dozens of times and replaced cracked panels with completely different models, but the same resolution. Physical panel size isn't even important for it to function.

      i'm currently looking at my Samsung Syncmaster 2233BW which had a bad LG-Philips LM220WE1 22" 1680x1050 panel (really bad yellow tint in the lower right corner.. size affected was about as big as a hand). Replaced the panel with a Chungwha CLAA220WA out of a noname (Fukato ?!) LCD monitor with fried electronics (previous owner used the wrong external PSU brick) and everything works fine

      Comment


        #4
        Re: Identifying a panel

        I am reading between the lines a little bit,But I am thinking you may have an HP panel that's broken?
        Any way as far as CCFLs go it's the length and thickness of the panel that is going to be the big difference.
        A lot of older monitors use a really thick panel, while newer monitors use a thin panel.
        You obviously could replace a smaller diameter CCFL in the cannels of the thicker panel.
        I have done this without any problems
        Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!

        Comment


          #5
          Re: Identifying a panel

          Originally posted by alexanna View Post
          I am reading between the lines a little bit,But I am thinking you may have an HP panel that's broken?
          Any way as far as CCFLs go it's the length and thickness of the panel that is going to be the big difference.
          A lot of older monitors use a really thick panel, while newer monitors use a thin panel.
          You obviously could replace a smaller diameter CCFL in the cannels of the thicker panel.
          I have done this without any problems
          Obviously I'm not communicating well.

          I have a 22" KDS monitor with one bad CCFL. The only problem with the panel in this monitor is one CCFL is bad. I have identified the CCFL, but lack the mechanical aptitude to replace it. (The 2.2 mm x 475mm CCFLs are small and fragile. I'm large and clumsy.) It is uneconomical to have CCFL warehouse replace the CCFLs.

          The label on the panel indicates it was made by Proview, but the product number matches a panel manufactured by Chi Mei (CMO). I am aware that the label on a panel does not necessarily mean that company manufactured it.

          Question 1. Is this panel actually made by CMO? (See pictures)

          Someone on eBay is selling a set of 4 CCFLs with holders (brackets, mounting channels). These came from a CMO 22" panel. If they fit, they would allow me to repair my panel without dealing with tiny CCFLs.

          Question 2. Is anyone familiar with the CCFL assemblies in the 22" HP monitors? Do they look like the pictures I have attached.

          PlainBill
          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

          Comment


            #6
            Re: Identifying a panel

            Originally posted by PlainBill View Post
            The label on the panel indicates it was made by Proview, but the product number matches a panel manufactured by Chi Mei (CMO). I am aware that the label on a panel does not necessarily mean that company manufactured it.

            Question 1. Is this panel actually made by CMO? (See pictures)
            M220Z1-P01 and -L01 are Chi Mei panels.

            the fact that the serial number (?) sticker on the t-con pcb actually starts with "CM" is another indicator. The IC on there might also be labelled as Chi Mei (i can't tell from the picture though..)

            edit: hah.. i just went looking.. i've got a Chi Mei M220Z1-L01 panel here.

            label (serial number (?) also starts with "CM")
            http://bambooz.pytalhost.net/badcaps/chimei/chimei1.jpg

            IC on the t-con is labelled as CHI MEI
            http://bambooz.pytalhost.net/badcaps/chimei/chimei2.jpg

            Chi Mei logo and model number silkscreened (exactly where the white sticker on your panel is)
            http://bambooz.pytalhost.net/badcaps/chimei/chimei3.jpg
            http://bambooz.pytalhost.net/badcaps/chimei/chimei4.jpg
            Last edited by Scenic; 05-12-2011, 12:37 PM.

            Comment


              #7
              Re: Identifying a panel

              Originally posted by Scenic View Post
              M220Z1-P01 and -L01 are Chi Mei panels.

              the fact that the serial number (?) sticker on the t-con pcb actually starts with "CM" is another indicator. The IC on there might also be labelled as Chi Mei (i can't tell from the picture though..)

              edit: hah.. i just went looking.. i've got a Chi Mei M220Z1-L01 panel here.

              label (serial number (?) also starts with "CM")
              http://bambooz.pytalhost.net/badcaps/chimei/chimei1.jpg

              IC on the t-con is labelled as CHI MEI
              http://bambooz.pytalhost.net/badcaps/chimei/chimei2.jpg

              Chi Mei logo and model number silkscreened (exactly where the white sticker on your panel is)
              http://bambooz.pytalhost.net/badcaps/chimei/chimei3.jpg
              http://bambooz.pytalhost.net/badcaps/chimei/chimei4.jpg
              Thank you! Armed with that information I looked at the IC on the panel card. Indeed, it does say Chi Mei. So this is a (crudely) re-branded Chi Mei LCD panel.
              NOW, the question is, how likely is it that the CCFL bracket (channel? holder? reflector?) from another 22" Chi Mei LCD panel will fit this one?

              PlainBill
              For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

              Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

              Comment


                #8
                Re: Identifying a panel

                Hi PlainBill found this whilst looking for something else
                Dony know if any use to you

                http://mylcdboard.com/2010_12/ZD100369.html

                Comment


                  #9
                  Re: Identifying a panel

                  Originally posted by sabre504 View Post
                  Hi PlainBill found this whilst looking for something else
                  Dony know if any use to you

                  http://mylcdboard.com/2010_12/ZD100369.html
                  Well, I have two thoughts about that. The prices certainly are excellent. The question is 'would they be delivered?' Most of the links for 'About us', FAQ, etc lead to a stock page with no information. I've already ordered the assemblies from the eBay auction. If it wasn't for that, I would be tempted.

                  PlainBill
                  For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                  Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                  Comment


                    #10
                    Re: Identifying a panel

                    HI well looked a bit deeper and their delivery prices seem a bit steep so maybe not as good as i first thought .

                    Comment

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