toshiba regza no picture

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  • sienoki
    sienoki
    • Jan 2012
    • 314

    #1

    toshiba regza no picture

    hey guys n gals..ive a toshiba 32AV555D that will not display any picture..it has audio & the backlights are on..it will display programme guide & menu etc but no picture.. ive tried downloading schematics from electrotanya but no pdf in rar filesthx
  • vinceroger69
    Badcaps Legend
    • Mar 2012
    • 6714
    • uk

    #2
    Re: toshiba regza no picture

    does it play a dvd etc through scart ok

    Comment

    • sienoki
      sienoki
      • Jan 2012
      • 314

      #3
      Re: toshiba regza no picture

      Originally posted by vinceroger69
      does it play a dvd etc through scart ok
      Hi fella..no picture displayed through scarts only audio aswell..thx
      Attached Files

      Comment

      • sienoki
        sienoki
        • Jan 2012
        • 314

        #4
        Re: toshiba regza no picture

        Originally posted by sienoki
        Hi fella..no picture displayed through scarts only audio aswell..thx
        these are best pics as no natural light..heres 1 of t-con..is the smd with 202 the fuse if so that tested ok on continuity..thx
        Attached Files

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: toshiba regza no picture

          If it displays the OSD overlay - i.e. menus - then the problem is with the main board.

          Check all LDOs on the main board, and any fuses you can see.
          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

          • sienoki
            sienoki
            • Jan 2012
            • 314

            #6
            Re: toshiba regza no picture

            Originally posted by tom66
            If it displays the OSD overlay - i.e. menus - then the problem is with the main board.

            Check all LDOs on the main board, and any fuses you can see.
            Cheers tom..will start looking over mainboard..thx fella

            Comment

            • sienoki
              sienoki
              • Jan 2012
              • 314

              #7
              Re: toshiba regza no picture

              Originally posted by sienoki
              Cheers tom..will start looking over mainboard..thx fella
              I cant find any schematics for this mainboard & there is no available replacement so im gonna have to put it away till i get some more time as i dont know where to start probing etc..thx

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: toshiba regza no picture

                Originally posted by sienoki
                I cant find any schematics for this mainboard & there is no available replacement so im gonna have to put it away till i get some more time as i dont know where to start probing etc..thx
                You know what an LDO looks like?

                I'm going to Leeds Uni in about 5 months so keep a stash of TVs you can't fix for me .
                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

                • sienoki
                  sienoki
                  • Jan 2012
                  • 314

                  #9
                  Re: toshiba regza no picture

                  Originally posted by tom66
                  You know what an LDO looks like?

                  I'm going to Leeds Uni in about 5 months so keep a stash of TVs you can't fix for me .
                  PM me when you going to leeds uni & i will see what ive got to rid of as they are taking over my place & r lass is going nuts

                  Comment

                  • sienoki
                    sienoki
                    • Jan 2012
                    • 314

                    #10
                    Re: toshiba regza no picture

                    Originally posted by sienoki
                    PM me when you going to leeds uni & i will see what ive got to rid of as they are taking over my place & r lass is going nuts
                    R these the LDO,s..thx
                    Attached Files

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: toshiba regza no picture

                      Originally posted by sienoki
                      R these the LDO,s..thx
                      1,2 and 5 yep. Check all pins and note part # down.
                      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

                      • sienoki
                        sienoki
                        • Jan 2012
                        • 314

                        #12
                        Re: toshiba regza no picture

                        Originally posted by tom66
                        1,2 and 5 yep. Check all pins and note part # down.
                        IC951=033ENA1=SHARP..thats topside
                        1. 5.02vdc
                        2. 4.88vdc
                        3. .045vdc
                        4. .041vdc
                        IC950 same part no & brand..bottomside
                        1. 4.81vdc
                        2. 4.88vdc
                        3. .027vdc
                        4. .018vdc
                        IC602=033DNA1=SHARP..bottomside
                        1. 18.07vdc
                        2. 10.14vdc
                        3. .029vdc
                        4. -.002vdc
                        all measured with power on black probe to chassis screw & red probes to each legs..thx
                        Attached Files

                        Comment

                        • sienoki
                          sienoki
                          • Jan 2012
                          • 314

                          #13
                          Re: toshiba regza no picture

                          Originally posted by sienoki
                          IC951=033ENA1=SHARP..thats topside
                          1. 5.02vdc
                          2. 4.88vdc
                          3. .045vdc
                          4. .041vdc
                          IC950 same part no & brand..bottomside
                          1. 4.81vdc
                          2. 4.88vdc
                          3. .027vdc
                          4. .018vdc
                          IC602=033DNA1=SHARP..bottomside
                          1. 18.07vdc
                          2. 10.14vdc
                          3. .029vdc
                          4. -.002vdc
                          all measured with power on black probe to chassis screw & red probes to each legs..thx
                          Ive taken 1/4 pics of both sides
                          Attached Files

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #14
                            Re: toshiba regza no picture

                            Can you check the tab pin?
                            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

                            • sienoki
                              sienoki
                              • Jan 2012
                              • 314

                              #15
                              Re: toshiba regza no picture

                              Originally posted by tom66
                              Can you check the tab pin?
                              The wire pin outs?

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #16
                                Re: toshiba regza no picture

                                Originally posted by sienoki
                                The wire pin outs?
                                You've got 4 pins on the bottom plus a fat tab on the top. The fat tab is probably the LDO output voltage. It is also used to heatsink the regulator.
                                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

                                • sienoki
                                  sienoki
                                  • Jan 2012
                                  • 314

                                  #17
                                  Re: toshiba regza no picture

                                  Originally posted by sienoki
                                  Ive taken 1/4 pics of both sides
                                  the tab pins readings..
                                  IC951=from OL to 3.27vdc
                                  IC950=same reading as IC951
                                  IC602=from OL to 3.28vdc

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #18
                                    Re: toshiba regza no picture

                                    Originally posted by sienoki
                                    the tab pins readings..
                                    IC951=from OL to 3.27vdc
                                    IC950=same reading as IC951
                                    IC602=from OL to 3.28vdc
                                    What do you mean by OL, what range did you have meter on?
                                    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

                                    • sienoki
                                      sienoki
                                      • Jan 2012
                                      • 314

                                      #19
                                      Re: toshiba regza no picture

                                      Originally posted by tom66
                                      What do you mean by OL, what range did you have meter on?
                                      Got fluke77 on VDC quick O.L on display then the reading..thx

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #20
                                        Re: toshiba regza no picture

                                        Originally posted by sienoki
                                        Got fluke77 on VDC quick O.L on display then the reading..thx
                                        That is normal for an autoranging meter. Assuming those regulators contain "33" in their part #, they are fine.

                                        Are there any other regulators? Like these:
                                        http://www.ictradenet.com/models_pic...PAK,TO-252.jpg
                                        http://upload.wikimedia.org/wikipedi...4/4f/D2PAK.JPG
                                        http://www.national.com/images/pkg/mp04a.jpg
                                        http://media.digikey.com/photos/Rohm...B1132T100R.JPG

                                        Anything you see that looks like those could be a regulator, so note down the part # and test the pins.
                                        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

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