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Polaroid TLA-04641c no stand by power

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    #1

    Polaroid TLA-04641c no stand by power

    I have a Polaroid TLA-04641c with no stand by power. Caps look fine and pulled and tested a few , (have a atlas ESR70) pics attached any ideas/
    thanks mike
    Attached Files
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    #2
    Re: Polaroid TLA-04641c no stand by power

    The big cap reads 152 v with power on

    Comment

      #3
      Re: Polaroid TLA-04641c no stand by power

      I am new here but very good with soldering and have meter. If any has a place for me to start on the i would be very thankfull

      Comment

        #4
        Re: Polaroid TLA-04641c no stand by power

        What is your line voltage? 152 volts is rather low for the voltage across the large cap; that implies a line voltage of about 110VAC.

        There are three ICs on the back side of the board; two toward the top, one near the bottom. What are the part number of those ICs.

        PlainBill
        For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

        Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

        Comment

          #5
          Re: Polaroid TLA-04641c no stand by power

          big 1 top is = L6548D
          small tp = 1653a
          bottom small = 358 ez535 if i see them right

          Comment

            #6
            Re: Polaroid TLA-04641c no stand by power

            yes 110 line volts

            Comment

              #7
              Re: Polaroid TLA-04641c no stand by power

              Originally posted by mcross View Post
              small tp = 1653a
              This looks like the right chip.

              http://pdf1.alldatasheet.com/datashe...P1653ADR2.html

              From the datasheet, it looks like pin 8 is your VCC and startup threshold is min = 12.25, typical = 13.25, and max = 14.5 V DC.
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              Comment

                #8
                Re: Polaroid TLA-04641c no stand by power

                Thanks for the reply, will check those in the morning thank you very much

                Comment

                  #9
                  Re: Polaroid TLA-04641c no stand by power

                  Originally posted by retiredcaps View Post
                  This looks like the right chip.

                  http://pdf1.alldatasheet.com/datashe...P1653ADR2.html

                  From the datasheet, it looks like pin 8 is your VCC and startup threshold is min = 12.25, typical = 13.25, and max = 14.5 V DC.
                  No. That's the PFC controller. I'd have expected it to be the small IC near the bottom of the picture, but '358' would be an LM358 dual op-amp.

                  PlainBill
                  For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                  Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                  Comment

                    #10
                    Re: Polaroid TLA-04641c no stand by power

                    Originally posted by PlainBill View Post
                    No. That's the PFC controller.
                    Of the 3, that looked the most promising since the other is an ACPI regulator for DDR memory.
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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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                      #11
                      Re: Polaroid TLA-04641c no stand by power

                      The service manual is at



                      but the schematic diagram is all fuzzy (page 33) that I can't make out any detail (plus it is sideways).
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                        #12
                        Re: Polaroid TLA-04641c no stand by power

                        Originally posted by retiredcaps View Post
                        The service manual is at



                        but the schematic diagram is all fuzzy (page 33) that I can't make out any detail (plus it is sideways).
                        And it doesn't show the power supply.

                        PlainBill
                        For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                        Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                        Comment

                          #13
                          Re: Polaroid TLA-04641c no stand by power

                          Better picture guys
                          Attached Files

                          Comment

                            #14
                            Re: found dead disc cap 331k 1kv

                            found dead disc cap 331k 1kv near transformer, i can i replace it with?

                            Comment

                              #15
                              Re: found dead disc cap 331k 1kv

                              Originally posted by mcross View Post
                              found dead disc cap 331k 1kv near transformer, i can i replace it with?
                              A 330pF, 10% 1000 Volt ceramic capacitor, such as TDK CK45-R3AD331K-NR; Murata DEHR33A331KA2B, or Vishay F331K29Y5RN63J5R.

                              PlainBill
                              For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                              Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                              Comment

                                #16
                                Re: Polaroid TLA-04641c no stand by power

                                still no stand by , time to look for new ps i think

                                Comment

                                  #17
                                  Re: Polaroid TLA-04641c no stand by power

                                  Did you ever get the TV to work?

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