Beocenter 9000 motors slow

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

Home Forums Product Discussion & Questions BeoCenter Beocenter 9000 motors slow

Viewing 8 posts - 1 through 8 (of 8 total)
  • Author
    Posts
  • #35106
    brianlaing
    GOLD Member
      • Topics Started 3
      • Total Posts 9

      Hello all!
      I got a donor amplifier / power board from Denmark to replace the faulty on I have in the US.
      I now have regular audio but have noticed that while the CD player works fine, the doors and the cassette are slow. The doors don’t open or close all the way (a relay towards the back shuts the motors down) and the cassette sounds about 1/3 too slow.

      One other thing – when I installed the donor / amp board there was no power to the cassette or door motors  I noticed that there was a T1A fuse missing from the donor board  I pulled one from the original board (checking it first to make sure it worked) and the audio came on as it should  I tested the other fuse and it was fine.  Just mentioning this since the fuses are fine on the board.  Muting works fine too

      Any thoughts on why the motors seem to be slow (they were fine with the previous amp/power board)?

       

      #35107
      Mark-sf
      BRONZE Member
        • Topics Started 0
        • Total Posts 297

        I would check the 7V power supply section around TR19 and C10. If the fuse that was bad was T1A for the 5v supply there may be and issue with IC4 circuit or its zener.

        #35108
        brianlaing
        GOLD Member
          • Topics Started 3
          • Total Posts 9

          Thanks for the tip! I actually decided to locate the parts on the original board (the one that controls the motor speeds correctly but only sound when you turn it up all the way). I noticed a missing resistor! So, tomorrow I’ll replace the missing resistor and swap back in the original board. Worth a try! B40FE599-2A03-44DF-9BE2-19F4265EF2E3

          #35109
          brianlaing
          GOLD Member
            • Topics Started 3
            • Total Posts 9

            Actually the missing resistor wasn’t the issue. In the original board the same resistor was removed, so not a coincidence. What ended up being the issue was a loose connector on a capacitor. The trace had lifted from the board for one of the legs on the capacitor, so I just added a jumper wire. Problem solved. The doors and cassette motors work at the proper speed. Always seems like something minor. 😉

            #35110
            johnparker99
            BRONZE Member
              • Topics Started 0
              • Total Posts 1

              I have the same problem with CD motor going slowly. Tape door motor is good. Do you recall where you found the loose connection @brianlang ?

              #35111
              Dillen
              Moderator
                • Topics Started 3
                • Total Posts 610

                Lubricate motor bearings.
                Replace belt.
                Clean door tracks.

                Martin

                #35112
                auric
                BRONZE Member
                  • Topics Started 15
                  • Total Posts 87

                  PCB 60 which is the board mounted across the heat sink on the back of the unit.

                  There is one connector with a pair of wires. P80 or P81. Those powers the motors.

                  The traces on that PCB are very thin and fragile. Lots of cold solder joints and cracked/peeling traces especially where the connectors terminate and speaker muting relay.

                  Reflow the connectors and make sure the traces are not cracked.

                  #35113
                  pepps
                  GOLD Member
                    • Kent, UK
                    • Topics Started 21
                    • Total Posts 145

                    Actually the missing resistor wasn’t the issue. In the original board the same resistor was removed, so not a coincidence. What ended up being the issue was a loose connector on a capacitor. The trace had lifted from the board for one of the legs on the capacitor, so I just added a jumper wire. Problem solved. The doors and cassette motors work at the proper speed. Always seems like something minor. ?

                    Fantastic well deduced!

                  Viewing 8 posts - 1 through 8 (of 8 total)
                  • You must be logged in to reply to this topic.