Hi Craig,

Thanks so much for the reply. I can only usually answer intermittently as I am not very well, put that down to old age. Anyhow, so far I will upgrade as you suggested. I used to be a fully paid up member of the previous edition of this site and also helped many people in my younger and more adept past. So far I have the following: The 6v live shows 4.7 volts, the 24 V line shows 24V at all times. On start the platter motor spins, the record dector lights up as expected. Now comes the silly part. If I have the arm/motor belt connected and manually drive the arm to the extreme right (as it wont drive there electrically) it does as it should on power up (the arm moves a few mm left to the rest position as I observed it to do when working correctly, it used to go all the way to the right, stop and move a few mm left to stop). If I the press 'on' it moves a few mm more to the left and then stops without making any contact to tell it to.. If I remove the arm drive belt and rewind the arm mechanism back far right then re-connect the power the arm movement motor will sit spinning happily until I manually move the arm to the 'SO' contact position. The motor then stops as it should. Then I press ON and the motor runs for a second and simply stops on its own. Also the 4.7 V (6V) line has been 4.7 V since I fixed an old issue of the arm movement/ record detector lamp intermittently stopping (this was a reed realy issue and after a poor connection on the 6V line to the board), now fixed.

Hi Craig,

Now I have re done the checks all Power Supply Voltages are as they should be. In fact the 6V line is a little above, so quite robust. I have upgraded my membership to silver and will down load the full service info you recommended. Thanks for your help thus far. Regards, Steve F

No worries Steve…..we like a bit of a challenge in here, 4.7vdc is very low for the supply to the logic IC’s I can’t remember the actual min voltage for them but 5.something comes to mind for reliable operation send pics 👍

Hi Craig,

Sorry for the 'non-action' on my part, was in hospital for a few days, nothing serious but necessary. I have downloaded the service training manual and am presently studying it to get a better understanding of how it all comes together. Also noted in that publication is that the cct diagrams and other small details do not correspond to my 4000 unit and some information is missing between following pages but still useable with a bit of 'imagination and past experience of this deck'. Thank you so far for the input. I will do some pictures to indicate what I am doing and some more information and measurements a bit later. If I eventually give up on it I will offer it to someone one here for a pittance for them to play with. In the meantime I will persevere and see. Cheers, Steve.

Hi Mark,

Thanks so much for the input, I am currently going through the 'training manual' which, whilst not exactly the same as my own 4000, is still very useful. I can see it is for a very early or even prototype version. Sorry for the late 'thanks' but I have ben ill recently and am slow sometimes to respond. I still think it is a 'logic cct' issue as ALL of the mechanical reasons have been eliminated thus far. I will, out of respect, keep you and Craig up to speed as to what I find. More importantly will keep a log of the ever more tortuous path I am currently walking with this deck and post here the results for anyone to refer to. Thanks Mark and have a good day there. Kind Regards, Steve.

Stephen

where are you located….

craig