Temic/Telefunken 1890DFC module pinout?

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  • eccerr0r
    Solder Sloth
    • Nov 2012
    • 8695
    • USA
    #1

    Temic/Telefunken 1890DFC module pinout?

    Anyone happen to know of a datasheet for the Temic/Telefunken 1890DFC FM module pinout? Perhaps any radio schematic that uses this module is sufficient, I might be able to pick out what I need.

    Supposedly this is a fairly common FM module that includes RF front end through stereo multiplex decoder. Only has a piece of the PLL - just the VCO as far as I can guess. It has a metal shield and is a surface mount and epoxied Chip On Board's on it.

    Googling has resulted in a bunch of people talking about it, but no specific data...

    Trying to debug a radio that has custom IC designations and no schematics, which thwarts me from figuring out what goes where. This 1890DFC is the only thing, minus perhaps the output amplifiers, that have anything that may have researchable data on it. The output amplifiers are working as AM works, so I need to go upstream to figure out why FM is not working in my other thread ...
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Temic/Telefunken 1890DFC module pinout?

      Try this guy: https://www.pauls-roehren.de/bastelk...paulus-ukw.php
      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

        • eccerr0r
          Solder Sloth
          • Nov 2012
          • 8695
          • USA
          #3
          Re: Temic/Telefunken 1890DFC module pinout?

          Cool, thanks this will get me somewhere I hope... Dang I saw the ad but didn't keep scrolling down, and there it is... a sample...

          Just that I thought I counted 18 pins...

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: Temic/Telefunken 1890DFC module pinout?

              It is amazing what that guy made.
              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

                • eccerr0r
                  Solder Sloth
                  • Nov 2012
                  • 8695
                  • USA
                  #5
                  Re: Temic/Telefunken 1890DFC module pinout?

                  Well, as the smarts of the radio is all in this module I have to admit that though the exterior is fairly interesting, the electronics on the other hand is kind of "yawn" ...

                  Thanks again, going back to the other thread now that this mystery is solved.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA
                      #6
                      Re: Temic/Telefunken 1890DFC module pinout?

                      From what I read, it is from 1965 design and used a lot in Chrysler cars radio.
                      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

                        • eccerr0r
                          Solder Sloth
                          • Nov 2012
                          • 8695
                          • USA
                          #7
                          Re: Temic/Telefunken 1890DFC module pinout?

                          Supposedly the TEMIC 1890DFC is a very sensitive FM receiver (and it indeed was, when it was working) so it's a nice module. However the module does have surface mount devices along with the chips on board, it must be of fairly recent design (1990s).

                          Copied from the other thread, this module appears to have failed so I either need to locate another module or toss this whole radio...

                            Comment

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