dual 721 tonearm

[handa]

I have a problem adjusting the vertical movement of the tonearm. something stops the tonearm to lift more than 1-2 mm from the rest position. Can somebody help?

[audioorigami]

can you post a picture or 2 of the arm close up?

[handa]

I don't have a working camera at the moment, but I can try to get it later.
A closer description of the problem:
I had to get inside the turntable to fix the arm rest. After that the arm don't lift more than max 1-2mm over the arm rest, and that is max 0,5mm over the record. On the other hand the arm can be lowered much more than necessary. The adjustment knob adjusted to max hight of the arm.

[lini]

(...) The adjustment knob adjusted to max hight of the arm.

Would that refer to the lift height adjustment knob on the left side of the antiskating dial - or rather to the tonearm height adjustment knob behind the antiskating dial? And is the locking lever of the latter in locked position?

Greetings from Munich!

Manfred / lini

[handa]

Tanks for answer.
The tonearm hight adjustment behind the antiskating dial, is adjusted to max hight. The lift hight knob at the left of the antiskating dial is also adjusted to max lift hight. This happens in the middle of the knobs working aria.

[mscili]

My 721 has exactly the same problem handa's has. Anyone has an idea about how to make the movemente of the tonearm lift bigger? That would be great... The turntable is unusable like this (the stylus and record would be destroyed by the auto-return not lifting the arm enough...).

Thanks!!!

[mscili]

Problem solved! Tomorrow with more time I will explain how I did it... Very good service manual!

[handa]

Nice,looking forward to it.

[mscili]

Here I am! Sorry, it took a long time. Very busy days...

Basycally, you just have to follow the instruction in the service manual, page 15, were it discusses the "Adjustment points" for the "Replacement of cue control plate". Of course we don't replace anything, but we need to adjust following that procedure.
On the tonearm lift itself, you need to turn the bush "206". You will see it in the Fig. 13 at page 13 in the manual. By turning that you can set the highest point the tonearm lift will reach. Try doing one 360° turn in one direction and turn manually the platter as described - you'll immediately find out the right direction, I forgot it. The automatic start and stop will alway raise the tonearm up to that point. This may be a bit too high for selecting a sigle song, that's why you have the "official" tonearm lift adjustment as described in the user manual. That's useful for having a lower height when placing the stylus manually somewhere on the record, but it will never go higher as the maximum height set for the automatic function.

I hope it helps... I'm really happy that I could fix it. It's a wonderful turntable, you need a lot of money to get something better souning!

Italian greetings from Switzerland!

Marco

[handa]

Thank you for your answer, but it is not a solution for me. I can turn the bush 206 so high that the arm reach it's top position. This is not high enough, I can't tip the arm more up. I think may be the whole tone arm system should be lifted.

[mscili]

That's very strange... On my 721 it's no problem to have the arm high enough, even with the tonearm in the lowest possible position. Do you have some expecially "tall" cartridge?

[handa]

I have an old sonus blue pick-up, normal hight I suppose. Something stops the arm to move more than 2 mm over the rest, and that is not enough to come above the vinyl record. I'm posting some pictures to make it a bit clearer. If somebody want a specific picture, I will post that. I can't find why it stops there so any suggestion is welcome. Maybe it is something simple I have not thought of.

[audioorigami]

could it be that the arm lifter is not coming down low enough?

or could it be that the cartridge is missing a spacer about 4mm thick above the cartridge?


bw
j7

[handa]

Thank you for answering. The arm lifter let the arm come down fare more than necessary. If I put a spacer between the pick-up and the shell the pick-up will come lower, if I understand correct. If there are something you would like to have a closer look at, I could take some more pictures.