Anyone familiar with a Model 6100 Turntable?? See pics!!

Discussion in 'Marantz Audio' started by Tom D, Mar 16, 2017.

  1. Tom D

    Tom D New Member

    Messages:
    41
    Recently got a Marantz 6100 Turntable. It was missing the belt and the stylus was bad so I ordered a belt and new stylus for the empire tc40 cartridge that was on there.... Now here is where I'm stumped.

    The motor shaft seems to sit too low for the belt to properly fit the platter and shaft. The lever next to the shaft adjusts the belt to move from 33 to 45. The top is 33 and the bottom 45. Here are some pics to help describe what I'm talking about.

    Here is a pic of the shaft as it sits with the lever set for 33rpm.
    IMAG3735.jpg

    Here is me lifting it up.
    IMAG3736.jpg

    Wider shot as it sits.
    IMAG3738.jpg

    Wider shot with me lifting.
    IMAG3737.jpg

    Underneath.
    IMAG3739.jpg

    Underneath again showing how much space it moves.
    IMAG3740.jpg

    What am I missing????

    Thanks

    Tom
     
  2. VintageMad89

    VintageMad89 Active Member

    Messages:
    209
    Location:
    Scotland
    Hi Tom, it could a combination of two things. Either the motor mounts are worn and sagging or the shaft itself has slipped down on the motor spindle.

    You can adjust the height of the shaft with the little flat head screw on the side of the shaft. More than often that cures the problem!

    Hope this helps
     
  3. Tim64

    Tim64 Well-Known Member

    Messages:
    782
    Location:
    North Central West Coast
    I would wait for the belt to arrive before adjusting anything and would clean the belt residue off the shaft. I have used a magic eraser to clean the shaft with good results. Also the way the motor sits on the guide pins is perfectly normal.
     
  4. Tom D

    Tom D New Member

    Messages:
    41
    I have the belt, it will not fit properly. Its supposed to fit around the platter and be adjusted up and down with that lever. Ok I see the little flat head screw. Looks like it has red lock tight on it. Ill see what adjustments this gives me.
     
  5. Tom D

    Tom D New Member

    Messages:
    41
    yea that little screw won't budge... if i crank on it more i might strip it... :no:

    never mind i kept at it, finally got it to break free
     
  6. Tom D

    Tom D New Member

    Messages:
    41
    its closer to where it needs to be now but i think if i just put another rubber grommet on the underside it will give me just a smidge more that i need.
     
  7. Lavane

    Lavane AK Subscriber Subscriber

    Messages:
    5,891
    Location:
    northern cal.
    The mounts dont look that bad. Maybe try thin washers between the c clips and red washer. Add an other washer if needed. If you change the mounts make sure they are rubber and not plastic. The last assortment of grommets I bought were still flexible but stiffer than what I usually get, might transmit more noise
     
  8. Tom D

    Tom D New Member

    Messages:
    41
    Yea I think I'll leave the rubber that's on there and you're right, just add a washer between the red one and the c clip, that should be enough. Thanks!
     
  9. Bert 1100

    Bert 1100 Super Member

    Messages:
    1,064
    Location:
    Planquiri, Switzerland
    Does the arm that moves the belt up and down have an adjustment ? Maybe the arm is the one that needs readjusting, and not the shaft ?
    Check where the belt is riding on the platter, for both 33 and 45 rpm.
     
  10. Tom D

    Tom D New Member

    Messages:
    41
    No adjustments on the arm from what i can tell. Service manual doesn't say anything about it either. I managed to get everything working by using a couple nylon spacers between the red washer and c clamp. Only problem now is I'm spinning too slow at high 29s low 30s. Using an app on my phone, my pro-ject table spins at a perfect 33.3 so it would seem the app is pretty close. Gonna go through the service manual again to see if there is a fine adjustment for speed???? Maybe i stretched my belt out from messing with it so much? Hoping my motor isn't completely worn out but that may be it too.
     
  11. Tom D

    Tom D New Member

    Messages:
    41
    well if i start spinning it and give it a little nudge in the right direction, i can get it to spin at a steady 32.7, so the record is tolerable and not warbling.... i think i read in the service manual it has a tolerance of like +-1.3 rpms for speed... hrmmmm
     
  12. Tom D

    Tom D New Member

    Messages:
    41
    hmmmm.... i used the reject lever to return the tone arm and that worked... also, it seems to be spinning at 32.7 all on its own... which is promising but still a little slow
     
  13. Tom D

    Tom D New Member

    Messages:
    41
    ordered another belt just incase i stretched this one... playing the waiting game :banana:
     
  14. Electone

    Electone Well-Known Member

    Messages:
    671
    Location:
    London, Ontario, Canada
    Try painting the spindle with a little nail polish. It will be just thick enough to get you to 33 1/3. I had to do this on a Yamaha YP-B4 - tried several belts, just never fast enough - a little smear of paint did the trick.
     
  15. Bob

    Bob Super Member

    Messages:
    1,062
    Location:
    West coast
    the thickness of the belt can affect the speed. if you do buy a second belt, use a different vendor
    or ask specifically the thickness. alternatively, go to a Marantz specialist/supplier.
     

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