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    Toshiba 32L1350UD

    Hi All.
    Does anyone have a service manual for this TV?
    It is dead, but there is voltage from PS to main board.

    Why is Toshiba such a hard find for service manual? Everything else is out there.

    Thanks in advance,

    Tim

    #2
    Re: Toshiba 32L1350UD

    TOSHIBA didn't own their TV design or SW or HW too the most they bought licenses brand from Vestel so it will help when you post photos on the back side of the boards how they connected together and the label of MB and PSU

    Comment


      #3
      Re: Toshiba 32L1350UD

      Originally posted by timbit View Post
      Hi All.
      Does anyone have a service manual for this TV?
      It is dead, but there is voltage from PS to main board.

      Why is Toshiba such a hard find for service manual? Everything else is out there.

      Thanks in advance,

      Tim
      There are many Voltages and Control Voltages on the power supply connector, you need to show pictures and the Voltage readings of each pins of the power supply connector that goes to the main board, right now we have no idea as to what we are dealing with without seeing the pictures.
      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


        #4
        Re: Toshiba 32L1350UD

        After reporting those voltages. With tv unplugged from power, unhook cable from powerboard to mainboard, plug tv into power, see if backlight comes on and stays on.

        Comment


          #5
          Re: Toshiba 32L1350UD

          Originally posted by nomoresonys View Post
          After reporting those voltages. With tv unplugged from power, unhook cable from powerboard to mainboard, plug tv into power, see if backlight comes on and stays on.
          Meter
          pin 1 - 12Vcc - 12.67Vcc
          pin 2 - 12Vcc - 12.67Vcc
          pin 3 - 12Vcc - 12.67Vcc
          pin 4 - GND - 0
          pin 5 - GND - 0
          pin 6 - 12_AUD - 12.67Vcc
          pin 7 - GND - 0
          pin 8 - 12V_LNB - 0
          pin 9 - GND - 0
          pin10 - 5V1 - 5.17
          pin11 - AC_DETECT - 3.53
          pin12 - POWER_TV - 3.32
          pin13 - BL_On/off - 0
          pin14 - 5V1 - 5.18
          pin15 - PWM - 0.11

          I did a tear down and tested the LEDs (3 strips) with a dc power supply and doing a continuity test. All three strips are dead.
          Attached Files

          Comment


            #6
            Re: Toshiba 32L1350UD

            How much dc voltage did you supply to test the led strips? Looks like there are 8 led's per strip. I doubt all 3 strings are open.
            What did you test doing the "continuity test" ? the led strips?
            Last edited by R_J; 08-23-2019, 09:50 PM.

            Comment


              #7
              Re: Toshiba 32L1350UD

              pin13 - BL_On/off - 0
              pin15 - PWM - 0.11

              It looks like you do not have Backlights on command or the PWM (Dimming) command from the Main 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


                #8
                Re: Toshiba 32L1350UD

                Originally posted by R_J View Post
                How much dc voltage did you supply to test the led strips? Looks like there are 8 led's per strip. I doubt all 3 strings are open.
                What did you test doing the "continuity test" ? the led strips?

                Did the continuity test with a meter and a continuity setting. ( and checked to make sure it worked first.) And did it on the LED strips one at time.
                I applied about 20vdc .5 amp

                Comment


                  #9
                  Re: Toshiba 32L1350UD

                  Originally posted by budm View Post
                  pin13 - BL_On/off - 0
                  pin15 - PWM - 0.11

                  It looks like you do not have Backlights on command or the PWM (Dimming) command from the Main board.
                  So...ps or main is having the issue?

                  Tim

                  Comment


                    #10
                    Re: Toshiba 32L1350UD

                    With tv unplugged from power, unhook cable from powerboard to mainboard, plug tv into power, see if backlight comes on and stays on. Post #4, did you do this, it's a process, directions need to be followed or it just takes longer to get to the issue.
                    Last edited by nomoresonys; 08-24-2019, 03:01 PM.

                    Comment


                      #11
                      Re: Toshiba 32L1350UD

                      There is no BL-ON/OFF and PWM signals from the Main Bd. The BGA Chip could need some heating to fix this issue.

                      Comment


                        #12
                        Re: Toshiba 32L1350UD

                        Originally posted by nomoresonys View Post
                        With tv unplugged from power, unhook cable from powerboard to mainboard, plug tv into power, see if backlight comes on and stays on. Post #4, did you do this, it's a process, directions need to be followed or it just takes longer to get to the issue.
                        Sorry. Yes I did. Nothing.

                        Comment


                          #13
                          Re: Toshiba 32L1350UD

                          Originally posted by timbit View Post
                          So...ps or main is having the issue?

                          Tim
                          Main board issue.
                          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


                            #14
                            Re: Toshiba 32L1350UD

                            So I have ordered a new main board. I will post a reply after it arrives. Thanks for all the help to all of you.

                            Tim

                            Comment


                              #15
                              Re: Toshiba 32L1350UD

                              So, I guess OP finally repaired his TV? I have the exact same model and symptoms only I couldn't test the LED strips as I've got no PSU able to push 20V.

                              Comment


                                #16
                                Re: Toshiba 32L1350UD

                                Test the voltages at the connector on the powerboard with EVERYTHING hooked up, it's the connector that the cable from powerboard to mainboard hooks into, most times there's a legend/map nearby that gives the expected voltages, you measure them with your mutimeter, set meter to 20 vdc then report them, put neg probe on chassis metal ground, pos probe on pin of connector, measure in standby take note, leave probes where they are then power on tv and again take note of voltages, report them here, example pin 1-ps-on-0 volts standby-power on-3.3 volts.

                                Comment


                                  #17
                                  Re: Toshiba 32L1350UD

                                  Video example there, measure all the pins and report: https://www.youtube.com/watch?v=EQ4hWflmjEw

                                  Comment


                                    #18
                                    Re: Toshiba 32L1350UD

                                    Be careful what you touch on the powerboard, the HOT/DEADLY side has voltages in places that can easily kill, the measurements we are doing here are on the cold side.
                                    Last edited by nomoresonys; 03-18-2021, 07:11 AM.

                                    Comment


                                      #19
                                      Re: Toshiba 32L1350UD

                                      I took OP's list and updated with my values:

                                      Meter
                                      pin 1 - 12Vcc - 11.31Vcc
                                      pin 2 - 12Vcc - 11.31Vcc
                                      pin 3 - 12Vcc - 11.31Vcc
                                      pin 4 - GND - 0
                                      pin 5 - GND - 0
                                      pin 6 - 12_AUD - 11.31Vcc
                                      pin 7 - GND - 0
                                      pin 8 - 12V_LNB - 0
                                      pin 9 - GND - 0
                                      pin10 - 5V1 - 4.86Vcc
                                      pin11 - AC_DETECT - 3.13Vcc
                                      pin12 - POWER_TV - 3.13Vcc
                                      pin13 - BL_On/off - 0
                                      pin14 - 5V1 - 4.86Vcc
                                      pin15 - PWM - 0.1Vcc

                                      This is from the cold side obviously, but the way the power board is made, the hot side is still very close and accessible.

                                      Comment


                                        #20
                                        Re: Toshiba 32L1350UD

                                        "pin13 - BL_On/off - 0" Sure looks like you have the same issue, no bl_on signal coming from the mainboard, replacement mainboard should do the trick.

                                        Comment

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