Sharp LC-32SD1E - green shadowing in black parts of picture

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #1

    Sharp LC-32SD1E - green shadowing in black parts of picture

    Picked up two TVs from Portsmouth today, this one is an interesting one. Has a picture, but basically anything which should be black is green tinted. Picture is otherwise okay; the tinting seems to be quite variable.

    I looked on the internet and was able to get a copy of the service manual in about 20 parts which I've now uploaded. One of them is a technical bulletin for this very issue - along with red and blue tinting which appears to be the same issue.

    http://www.tgohome.com/ServiceManual...&Search=Submit


    Now it claims that I need to do a software update, unfortunately that means I need a DB-9 to MiniDIN-9 connector, a DB-9 to USB, and the firmware for the TV, none of which I have... So, it may end up being a £43 board swap; but I'll mess around in the service menu to see if I can do it without a board swap.

    Camera's on charge, I'll upload pictures later. About to do the teardown. Never repaired a "real" Sharp before. The newer Sharp TVs are mostly crappy Vestel sets, along with Toshiba... seems there are very few good brands left in the market place.
    Last edited by tom66; 07-15-2012, 03:11 PM.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Sharp LC-32SD1E - green shadowing in black parts of picture

    Well, just stripped it down. Owner was obviously a smoker, covered everything in hideous beige dust. Cleaned most of that off - smoke-infested electronics is enough to put me off smoking! Then, I noticed the LVDS cable was not seated properly on one side, quite badly in fact; but that still didn't fix it. I didn't think it would, because the green noise doesn't appear to affect the OSD, so it must be a main board issue. Still trying to figure out if this thing has a service menu and if so how to access it.
    Last edited by tom66; 07-15-2012, 03:41 PM.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • scokljat
      Badcaps Veteran
      • May 2012
      • 275
      • Croatia

      #3
      Re: Sharp LC-32SD1E - green shadowing in black parts of picture

      Originally posted by tom66
      Now it claims that I need to do a software update, unfortunately that means I need a DB-9 to MiniDIN-9 connector, a DB-9 to USB, and the firmware for the TV, none of which I have... So, it may end up being a £43 board swap; but I'll mess around in the service menu to see if I can do it without a board swap.
      Does it mean that firmware just got corrupted? Code changes a bit just like that by itself? Or there is a bug in firmware which sometimes manifest like you described and at the end produce firmware corruption. Perhaps a spike in PSU voltage corrupted the firmware. A mystery... Wish you luck.

      Cheers,

      S

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Sharp LC-32SD1E - green shadowing in black parts of picture

        Awesome! I just fixed it. Here's how, it's really easy:

        With the set in STANDBY (RED LED lit) press and hold on the top controls CH- and INPUT.

        Then press POWER switch down and wait 10 seconds. Release CH- and input. The set will them power up normally. A small "K" will shortly appear in the top corner of the screen.

        Then press VOL- and CH- on the top controls, the service menu should come up.

        Scan through the menu pages using the UP and DOWN d-pad controls. Scan through until you find the page with "EEP CLEARB". Select it using the channel buttons. Do not select "EEP CLEAR"; it must be the "B" variant. Press volume up to select and then enter, wait a few seconds and it should be done.

        Then scroll through the rest of the menus and select "FACTORY INI"; select Euro for European version, haven't tried other things yet. Execute the option and wait about 10 seconds. Then power off the TV, and power it back on again. You'll need to retune it, but it should work fine.

        Fixed.
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • scokljat
          Badcaps Veteran
          • May 2012
          • 275
          • Croatia

          #5
          Re: Sharp LC-32SD1E - green shadowing in black parts of picture

          So definitely a bug in firmware that produced a mess in some internal settings stored in eeprom. Right? Congratulations on a quick fix!

          Cheers!

          S

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Sharp LC-32SD1E - green shadowing in black parts of picture

            Originally posted by scokljat
            So definitely a bug in firmware that produced a mess in some internal settings stored in eeprom. Right? Congratulations on a quick fix!

            Cheers!

            S
            Yeah, I guess so. Possibly also the owner messing around with things he shouldn't, or a power glitch causing issues as you mentioned.

            I'm going to print out the instructions and include them inside the TV next time for any future techs who need to fix it.

            Added it to my tips list

            http://www.tgohome.com/ServiceManual...epair_tips.txt
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: Sharp LC-32SD1E - green shadowing in black parts of picture

              Here's some pictures of the teardown, although the repair can be completed without undoing a single screw...

              Overall very high build quality, better than the two Toshiba sets I have repaired, formerly would have put them on a level playing field as 7/10... but the Sharp is definitely better, approaching 10/10 on build. Deduct one point for ridiculous use of odd screws for stand but you don't need to take stand off to work on it. Has a Sharp LCD panel as well as Sharp main stuff. PSU is Sharp too, with Rubycon and Nichicon exclusively, and all black anodised heatsinks. Very nice.

              Seems the only things that bring down these well built TVs are obscure main board issues and software issues, rarely PSU issues.

              You can see the note included inside the TV - should save someone time if this happens to be an issue although from reading up it seems to be fairly uncommon so may be a rare situation which causes it. (There's nothing on the side I've taped the note to, so there are no cooling issues...)
              Attached Files
              Last edited by tom66; 07-15-2012, 05:06 PM.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • japlytic
                Badcaps Legend
                • Oct 2005
                • 2086
                • Australia

                #8
                Re: Sharp LC-32SD1E - green shadowing in black parts of picture

                I've seen Chemi-Con electrolytics in Sharp TVs too.
                Talking about the note attached to the chassis, I saw a bulletin dated from the mid-70s regarding a fault with a particular Philips TV chassis (rectifiers), which had a note to label a piece of copper wire as a fuse link to assist in future repairs.

                I think firmware updates should be provided for at least 5 years after the particular chassis has been discontinued.
                My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

                Comment

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