Source for IC 0Z9938GN - Toshiba 22CV100U

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  • dignome
    New Member
    • Sep 2011
    • 3
    #1

    Source for IC 0Z9938GN - Toshiba 22CV100U

    Hi forum. I'm Looking for the IC that drives the ccfl flyback circuit on this tv. It is marked "0Z9938GN" and is a 16 pin smd.

    The unit was dead when I got it. No activity on the primary side as in the reservoir capacitor had a good charge but the pwm chip was not running and the npn fet was leaking. Purchased the pwm chip from digikey (SG6742MRSYCT-ND), a replacement fet (TK8A65D(STA4QM)-ND), and a replacement diode for D101 (shorted) which restored most of the smps. Standby voltage and main board are working great and there is an image on the screen but no backlight. The smd chip described above has shorted VDD to Ground. Also one of the two FETs that drive the flyback transformer for the backlight was giving low ohms reading from drain to source. Replaced both of these parts as well (using FDD8424HCT-ND). After removing the 0Z9938GN IC I measured vdd pin which gave ~6 volts so I'm confident replacing this IC will restore the backlight function.

    If you have this part or know of an alternative or where to source this part I'd appreciate your reply.

    Thank you.
    Tags: None
    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Source for IC 0Z9938GN - Toshiba 22CV100U

      Originally posted by dignome
      If you have this part or know of an alternative or where to source this part I'd appreciate your reply.
      Ebay.com has several if you search for OZ instead of 0Z (i.e. letter O). Under $5 with free shipping.
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        Comment

        • dignome
          New Member
          • Sep 2011
          • 3
          #3
          Re: Source for IC 0Z9938GN - Toshiba 22CV100U

          Thanks! Once I have it installed I'll update the thread as to whether or not it is working correctly. Not sure what happened to the board to cause soo much damage. Again, thank you.

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271
              #4
              Re: Source for IC 0Z9938GN - Toshiba 22CV100U

              findchips.com is another way to search all the major distributors, but when I used it, there was no supplier for your chip.

              We have seen variations of this chip used in lcd monitors.
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              We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

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                Comment

                • dignome
                  New Member
                  • Sep 2011
                  • 3
                  #5
                  Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                  The part arrived yesterday and has been installed. The tv is now fully functional. Sorry there are no pictures. Thanks for your help.

                    Comment

                    • retiredcaps
                      Badcaps Legend
                      • Apr 2010
                      • 9271
                      #6
                      Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                      Originally posted by dignome
                      The tv is now fully functional.
                      Good to hear that fixed the problem. Congrats.
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                      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                      Please do not post inline and offsite as they slow down the loading of pages.

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                        Comment

                        • fierce
                          Member
                          • Nov 2012
                          • 14
                          • us
                          #7
                          Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                          Where was the ic you replaced? I'm having the same problem with the same model TV. Thank you

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA
                              #8
                              Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                              Post the pictures of the back of the TV, then we can tell you which one is the inverter board.
                              Never stop learning
                              Basic LCD TV and Monitor troubleshooting guides.
                              http://www.badcaps.net/forum/showthr...956#post305956

                              Voltage Regulator (LDO) testing:
                              http://www.badcaps.net/forum/showthr...999#post300999

                              Inverter testing using old CFL:
                              http://www.badcaps.net/forum/showthr...er+testing+cfl

                              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                              http://s807.photobucket.com/user/budm/library/

                              TV Factory reset codes listing:
                              http://www.badcaps.net/forum/showthread.php?t=24809

                                Comment

                                • fierce
                                  Member
                                  • Nov 2012
                                  • 14
                                  • us
                                  #9
                                  Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                                  Nevermind I found it

                                    Comment

                                    • fierce
                                      Member
                                      • Nov 2012
                                      • 14
                                      • us
                                      #10
                                      Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                                      I have a few other tvs,is there another part that can be used there? Or does it have to be the OZ9938GN ?

                                        Comment

                                        • budm
                                          Badcaps Legend
                                          • Feb 2010
                                          • 40746
                                          • USA
                                          #11
                                          Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                                          It has to be the same since the circuits are built based on that IC design, there is no second source for the IC made by O2 Micro.
                                          Never stop learning
                                          Basic LCD TV and Monitor troubleshooting guides.
                                          http://www.badcaps.net/forum/showthr...956#post305956

                                          Voltage Regulator (LDO) testing:
                                          http://www.badcaps.net/forum/showthr...999#post300999

                                          Inverter testing using old CFL:
                                          http://www.badcaps.net/forum/showthr...er+testing+cfl

                                          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                          http://s807.photobucket.com/user/budm/library/

                                          TV Factory reset codes listing:
                                          http://www.badcaps.net/forum/showthread.php?t=24809

                                            Comment

                                            • fierce
                                              Member
                                              • Nov 2012
                                              • 14
                                              • us
                                              #12
                                              Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                                              And the other two parts he replaced,a Fet and the PWM,what are those? What do they look like? I'm pretty new to fixing Tvs,so far I've had good luck and fixed a few,I just don't know the names of everything yet. Thanks for the help and info

                                                Comment

                                                • fierce
                                                  Member
                                                  • Nov 2012
                                                  • 14
                                                  • us
                                                  #13
                                                  Re: Source for IC 0Z9938GN - Toshiba 22CV100U

                                                  Ok so I replaced that IC and now if I shine a light on it I can see what's on the screen,so im guessing its a backlight issue,what do I need to replace now to solve the backlight problem? Thanks

                                                    Comment

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