[Stephen Farmery]

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 Farmery]

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.

[Stephen Farmery]

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

[Stephen Farmery]

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.

• This reply was modified 1 week, 3 days ago by Stephen Farmery.
• This reply was modified 1 week, 3 days ago by Stephen Farmery.

[Stephen Farmery]

Hi Craig, and Mark if you are reading this, thank you so much for the imput.

I know that the logic CCTS are very reliable but the problem is that the logic board is, as you say extremley complicated to understand as a whole. I have tried for a few months now to work it all out. The issue I have is that for some reason the fault gets worse every time I simply re start the deck to fault find. I have cleaned ALL switches on the ctrl panel and all work as they should. ALL of the switches under the arm travel board work as they should, cleaned and checked. The initial problem was that the arm would play normally, lift at record end and then nothing, no arm return. When I re started the deck after manually re winding the arm back it went almost to the record and stopped before actuating any of the switches. Then again after doing it all again the arm simply went fwd about a few cm and stopped with the motor running and no drop or anything. The situation now is this: I have the control panel set with ALL of the switches in their ‘pre start mode’ with bits of cable between the springs and the switches, the board is out of the deck and panel switches removed. I removed the arm drive belt to watch the arm motor. When I plug the deck in and press start with a screwdriver blade to initiate, the motor runs for about a second and stops with no drop. If I unplug the deck and do it again it does exactly the same thing. The fact that the motor runs tells me the fwd drive all works, the fact that the motor stops on its own without any switch actuation tells me that something is stopping the arm drive motor on its own without any switch driven command. I really am having trouble totally understanding that logic CCT to competently fault find in this complex maze. I do understand how NAND gates work, just not this logic board.

[Stephen Farmery]

Can someone point me to a supplier of the logic chips used on my Beogram 4000 deck please? In particular the FCH 131/ FCH 111 and FCY 101. My google search pulls up data sheets and not much else. Thanks.

• This reply was modified 2 weeks ago by Stephen Farmery.

[Stephen Farmery]

No worries, I found it all on page 3-3 of the service manual. Me being the village idiot today I think.

[Stephen Farmery]

Just a quick question, can anyone point me to information regarding either the correct transistors for my beogram 4000 mainboard or equivalents please. The numbers, such as 8320232 bring up nothing on a google search. Thanks people. 🙂

[Stephen Farmery]

Thanks so much Craig, I have no issue with you finding it funny at all, so no probs there. I appreciate you taking the time and will start again with your recommendations. Will start with a few piccies later on. Have a good weekend there.

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