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Sharp Aquos LC-32GD8E

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    #21
    Re: Sharp Aquos LC-32GD8E

    Maybe. Check all voltage regulators, power supplies on main board.
    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.

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      #22
      Re: Sharp Aquos LC-32GD8E

      I can get the relay to click when i put 3.3v on both pcons1&2, This then gives me a nice speaker pop like a normal tv would do and i get 24v going to the inverters, but no lights yet.

      Checked all diodes and transistors on the mainboard but all seem ok.
      Do NOT touch heatsinks when testing for voltages as they may be LIVE!

      Comment


        #23
        Re: Sharp Aquos LC-32GD8E

        Jump INV-ON to get backlights to fire up.

        If screen is good then (not cracked) replace main board I guess... Or hunt down a set with a cracked LCD.
        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.

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          #24
          Re: Sharp Aquos LC-32GD8E

          what voltage should blon be? tried jumping all 3 coz they are next to each other with the same 3.3v but relay clicked off.
          Do NOT touch heatsinks when testing for voltages as they may be LIVE!

          Comment


            #25
            Re: Sharp Aquos LC-32GD8E

            Hmm, that is strange, but try using a 1kohm resistor instead between 3.3V and BLON/INV ON.

            If that does not work you will have to break out the wire from the inverter and feed 3.3V in that way.
            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.

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              #26
              Re: Sharp Aquos LC-32GD8E

              Can i use the 3.3v from a pc psu to do this or should i carry on using a 3.3v source from the tv mainboard?

              Would the inv_brt be jumped too? I am guessing this controls the brightness.

              Thanks Tom.

              EDIT,

              Woops, just noticed that BLON is actually pin 4, and not 3. Pic included.
              Attached Files
              Last edited by gilly1984; 12-05-2012, 08:01 AM.
              Do NOT touch heatsinks when testing for voltages as they may be LIVE!

              Comment


                #27
                Re: Sharp Aquos LC-32GD8E

                Just remember one thing about trigerring the PS_ON, BL_ON, these signals are generated by the main board, the output are from the Collector of the transistors on the main board that is normally on so the output will be low until the micro controller turns off the transistors so that the transistors will switched off causing the signals to go high. If the transistors are on, when yoy try to jump the PS_ON or BL_ON Pin, nothing will happen since the transistors are on (stay in LOW state). You should disconnect the BL_ON, PS_ON lines that go back to the main board before using the resistor to force on the inverter and the power supply.
                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


                  #28
                  Re: Sharp Aquos LC-32GD8E

                  I have got the screen to come on by jumping pcon1, pcon2, inv_on and inv_brt, all whilst connected to the main board. The screen lit up but had lines down it, they started from about halfway down the screen then to the bottom of the screen, dont think it it tab bond issue as it wasnt all the way down the screen.

                  Here is some pics of the mainboard, in the service manual it says BU5V goes to 2 voltage regs, a 3.3v and 1.8v reg but i cant find them to test them?
                  Attached Files
                  Do NOT touch heatsinks when testing for voltages as they may be LIVE!

                  Comment


                    #29
                    Re: Sharp Aquos LC-32GD8E

                    Sounds more like a T-con not getting proper power or main board crashing -- may be quite normal... I have seen weird patterns before when getting screen to light up with main board dead.
                    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


                      #30
                      Re: Sharp Aquos LC-32GD8E

                      Can you spot any voltage regs to test Tom? Or point me in a direction to test something.

                      I dont like to give up on things

                      Just throwing a null modem together but read that you can only send commands to a tv that is on? Is this true, if it is i am doomed.

                      Thank for input budm.
                      Last edited by gilly1984; 12-05-2012, 11:20 AM. Reason: Added thanks to budm
                      Do NOT touch heatsinks when testing for voltages as they may be LIVE!

                      Comment


                        #31
                        Re: Sharp Aquos LC-32GD8E

                        The 5 pin plus tab devices in this pic are all regulators.
                        https://www.badcaps.net/forum/attach...0&d=1354726268

                        I have never seen a bad Sharp regulator, but I would not rule it out.
                        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


                          #32
                          Re: Sharp Aquos LC-32GD8E

                          How do i test them, one has 3.3v on the tab, but the other 2 have 0v

                          2 have 5.2v on pin 1 and the 3rd one has 15.6v on pin 1.
                          Do NOT touch heatsinks when testing for voltages as they may be LIVE!

                          Comment


                            #33
                            Re: Sharp Aquos LC-32GD8E

                            Test all pins & list part number... test relative to chassis of TV with TV plugged in.
                            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.

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                              #34
                              Re: Sharp Aquos LC-32GD8E

                              I cant use chassis ground as regs are on the underside of the mainboard, i used the screw hole on the hdmi instead.

                              Datasheet http://pdf1.alldatasheet.com/datashe...0WZ11J00H.html

                              Reg 1 (ic1702) Tab at top,

                              pin 1 = 5.14v
                              pin 2 = 3.71v
                              pin 3 = 3.29v
                              pin 4 = 2.62v
                              pin 5 = 0.00v

                              Reg 2 (ic1707) Tab at top,

                              pin 1 = 5.23v
                              pin 2 = 0.00v
                              pin 3 = 0.00v
                              pin 4 = 0.00v
                              pin 5 = 0.00v

                              reg 3 (ic1703) Tab at top,

                              pin 1 = 15.67v
                              pin 2 = 0.00v
                              pin 3 = 0.00v
                              pin 4 = 0.00v
                              pin 5 = 0.00v

                              Also there is a 5 pin smd too, it is marked with ZG6F35, google doesnt help with that one.

                              I will give readings anyway,

                              Location, ic1701

                              pin 1 = 3.73v
                              pin 2 = 5.19v
                              pin 3 = 0.00v
                              pin 4 = 0.00v
                              pin 5 = starts off at 1.70v ish then quickly drops to 0.46v, it does that every I i touch it with the probe, its like the probe is putting a drain on it?





                              rs232 lead is no good, the link you sent me says that it only works on a tv that switches on
                              Do NOT touch heatsinks when testing for voltages as they may be LIVE!

                              Comment


                                #35
                                Re: Sharp Aquos LC-32GD8E

                                OK, thanks for readings.

                                Pin #1 is input.
                                Pin #2 is enable control for output (>2V, output on)
                                Pin #3 is output.
                                Pin #4 is adjustment terminal (should be 2.64V, relative to GROUND)
                                Pin #5 is ground.

                                pin 1 = 5.14v
                                pin 2 = 3.71v
                                pin 3 = 3.29v
                                pin 4 = 2.62v
                                pin 5 = 0.00v
                                Working: Output is enabled, 3.3V out, with adjustment at ~2.64V.

                                pin 1 = 5.23v
                                pin 2 = 0.00v
                                pin 3 = 0.00v
                                pin 4 = 0.00v
                                pin 5 = 0.00v
                                Working: Output is disabled.

                                pin 1 = 15.67v
                                pin 2 = 0.00v
                                pin 3 = 0.00v
                                pin 4 = 0.00v
                                pin 5 = 0.00v
                                Working: Output is disabled.

                                For other regulator, the readings seem odd. Picture?
                                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.

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                                  #36
                                  Re: Sharp Aquos LC-32GD8E

                                  Ok, thank you.

                                  Here is pic. Not sure what it is so gave readings anyway.

                                  What is it that tells the regs to switch on?

                                  Can i switch them on by jumping or will that kill something.
                                  Attached Files
                                  Do NOT touch heatsinks when testing for voltages as they may be LIVE!

                                  Comment


                                    #37
                                    Re: Sharp Aquos LC-32GD8E

                                    When i jump the blon/pcon 1 &2 the other regs start working. ic1707 gives 3.3v on the outpu, and ic1703 gives 8.00v on the output.

                                    Is there a way to reset the bios chip? (Not bios but you no what i mean).

                                    There is 2 solder points on the mainboard too that say "TP RESET" but this does nothing.
                                    Do NOT touch heatsinks when testing for voltages as they may be LIVE!

                                    Comment


                                      #38
                                      Re: Sharp Aquos LC-32GD8E

                                      Probably not a regulator.
                                      I think firmware may be corrupt, no reset will cure that. The "I2C" method may be necessary...
                                      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


                                        #39
                                        Re: Sharp Aquos LC-32GD8E

                                        Can i make my own interface?
                                        Do NOT touch heatsinks when testing for voltages as they may be LIVE!

                                        Comment


                                          #40
                                          Re: Sharp Aquos LC-32GD8E

                                          It looks like the Sharp board has custom IC on it, so probably not, plus you would need new firmware. Right now I think you should look for a new main board.
                                          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.

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