RCA 32 lcd tv

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  • nelfig
    Member
    • Jan 2013
    • 23
    • canada

    #1

    RCA 32 lcd tv

    Ok so im new at fixing lcd tv's i just received a rca 32 inch lcd tv what it does it turns on i can see the back light on and then 5 seconds later it shuts off back into stand by mode ive opened it up but see no caps bulging or blown so what could it be inverter board or power board or tuner board the model is rlc3273a-b
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Need help with rca 32 lcd tv

    I'd suggest a mod move this to the TV forum.

    A good start is to let us know what equipment you have: soldering iron, digital multimeter, etc.

    Second step is to post pictures, clear and in focus, of the TV's boards and one of the overall layout. Pictures up to 2000x2000 are supported; keep them around that size so we can clearly see the layout and the components.
    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

    • nelfig
      Member
      • Jan 2013
      • 23
      • canada

      #3
      Re: Need help with rca 32 lcd tv

      sorry for posting in wrong forum and yes i do have a multimeter and soldering gun magnafineglass and such here are some pics i hope it helps






      model for power board cv318h-x
      model for tuner board mp116a rev 1.0
      model for inverter board v327-101 made by darfon
      Last edited by nelfig; 01-09-2013, 12:31 PM.

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Need help with rca 32 lcd tv

        OK, do you see a pin marked 24V on the power supply?

        Check the voltage here, using DC200V, black probe on chassis, red probe in pin area.
        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

        • nelfig
          Member
          • Jan 2013
          • 23
          • canada

          #5
          Re: Need help with rca 32 lcd tv

          only one i seen on the power board was this one i did what you said and the reading i got was 35.4 but that cable goes from the power board to the inverter board

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Need help with rca 32 lcd tv

            Your meter needs to be set to DC volts, not AC volts.
            If reading is still high replace meter battery.
            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

            • nelfig
              Member
              • Jan 2013
              • 23
              • canada

              #7
              Re: Need help with rca 32 lcd tv

              thats what it was set at and realized my batterywas no good now its reading 23.5
              Last edited by nelfig; 01-09-2013, 09:33 PM.

              Comment

              • nelfig
                Member
                • Jan 2013
                • 23
                • canada

                #8
                Re: Need help with rca 32 lcd tv

                so my guess is the inverter board is not working then

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: Need help with rca 32 lcd tv

                  That would be a possible suspect. Is there a pin marked ON/OFF, BLON or BLON/OFF on the power supply?
                  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

                  • ratdude747
                    Black Sheep
                    • Nov 2008
                    • 17136
                    • USA

                    #10
                    Re: RCA 32 lcd tv

                    Moved as requested.
                    sigpic

                    (Insert witty quote here)

                    Comment

                    • nelfig
                      Member
                      • Jan 2013
                      • 23
                      • canada

                      #11
                      Re: RCA 32 lcd tv

                      no just where the cable connects there is just ps on

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #12
                        Re: RCA 32 lcd tv

                        OK, that is unrelated for now. PSU is switched on (PSON) because 24V is present. Can we have a close picture of the inverter board?
                        Last edited by tom66; 01-10-2013, 01:48 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

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: RCA 32 lcd tv

                          Please post a good closed up pictures of the area around the white connector (the one that the 24v from power supply is connected to) on the inverter board. Darfon!
                          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

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #14
                            Re: RCA 32 lcd tv

                            Darfon?
                            Run! Although, often easy fix...
                            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

                            • nelfig
                              Member
                              • Jan 2013
                              • 23
                              • canada

                              #15
                              Re: RCA 32 lcd tv

                              power supply connectors


                              right side


                              middle


                              left side

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #16
                                Re: RCA 32 lcd tv

                                OK, thanks for the pictures, but please edit the post and use GO ADVANCED, MANAGE ATTACHMENT to up load the pictures instead of posting them in line which takes a long time to display the pictures.
                                If you look to the right of that multi-pin connector on the inverter board, there are printings that show the pin outs of the connector, check the DC voltage between the BL_ON pin and the chassis ground to see if you still have >3VDC when the screen black out.
                                See if this PANASONIC has the same dimensions:
                                http://www.digikey.com/product-detai...0759-ND/285441

                                Digikey does not have it in stock but you can check other place like MOUSER.
                                Last edited by budm; 01-10-2013, 03:05 PM.
                                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

                                • nelfig
                                  Member
                                  • Jan 2013
                                  • 23
                                  • canada

                                  #17
                                  Re: RCA 32 lcd tv

                                  it comes up as 5v

                                  Comment

                                  • budm
                                    Badcaps Legend
                                    • Feb 2010
                                    • 40746
                                    • USA

                                    #18
                                    Re: RCA 32 lcd tv

                                    OK, so when the backlights go out, the required voltage (24VDC) is present, the turn on command (BL_ON) is also present, but the lamps still go into shutdown. Then you need to look at the inverter board.
                                    1) Check all the fuses (Fx) using 200 Ohm scale, they should show less than 1 Ohm.
                                    2) I would check the transformer secondary high voltage winding of all the transformers to see if they are all within 3% of each other.
                                    P/ as printed on the inverter transformer?

                                    Notes: also check pin 14 (??? PWM) to see what you have.
                                    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

                                    • gopher
                                      New Member
                                      • Jan 2013
                                      • 3
                                      • Canada

                                      #19
                                      Re: RCA 32 lcd tv

                                      Hey there nelfig,
                                      I just got the same tv with the same problem, were you able to find the problem?

                                      Comment

                                      • gopher
                                        New Member
                                        • Jan 2013
                                        • 3
                                        • Canada

                                        #20
                                        Re: RCA 32 lcd tv

                                        Originally posted by budm
                                        OK, so when the backlights go out, the required voltage (24VDC) is present, the turn on command (BL_ON) is also present, but the lamps still go into shutdown. Then you need to look at the inverter board.
                                        1) Check all the fuses (Fx) using 200 Ohm scale, they should show less than 1 Ohm.
                                        2) I would check the transformer secondary high voltage winding of all the transformers to see if they are all within 3% of each other.
                                        P/ as printed on the inverter transformer?

                                        Notes: also check pin 14 (??? PWM) to see what you have.
                                        What should i have on pin 14?

                                        Comment

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