Behsen

Forum Replies Created

Viewing 4 posts - 1 through 4 (of 4 total)
  • Author
    Posts
  • in reply to: Beogram 4002 (5511) – turns on when it is turned off #9151
    Behsen
    BRONZE Member
    • Topics Started 1
    • Total Posts 5

    To Mark: You mentioning that d1 is grounding the base of tr1 is the kind of support that I could need right now – but unfortunately the schematics for 4002/type 5511 is completely different than for 5501/5502

    Things has changed since the first versions of “4002”. Type 5511 has a resistor (R6/82K) in connection with base of TR1 – and following R6 there is another resistor (R7/18K). So there is no diode D1 in connection with base of TR1. But diode D5 and D8 has connection to the collector of TR1. D5 is furthermore in serial with the resistor you have mentioned 2.2K (R1). I’m not used to look into schematics – so it’s not easy for me to figure out ¬†– but I’m still trying to find out. The switch I have cleaned Is the SO switch and I’m sure It is not faulty.

    To Martin. It is not my intention to replace everything in one time – but in small steps – and after each step follow up with testing – that things is working. This turntable will soon be 50 years old. Are there not some of the components that should be replaced now (no matter what).

     

    BR Benny

    in reply to: Beogram 4002 (5511) – turns on when it is turned off #9106
    Behsen
    BRONZE Member
    • Topics Started 1
    • Total Posts 5

    No help possible ??? /  Unfortunately I have not found the reason for the issue yet.

    Are none of the experienced members familiar with the issue I have described.

    Obvious it is an electrical issue on the PCB board (main board). I’m not sure what to check next. I have measured on all the transistors – and diodes and they looks to be fine. I might decide partly to replace more or less all components on the pcb until the faulty component shows up. I could do so because I have a correct working 4002 also. But I assume that there might be 150 components or more on the pcb – so that is going to be a big task anyway – and I think there also might be a risk that something could go wrong – so I might end up with two turntables with issues instead of one.

    However if I begin to exchange components – what would most likely need to be replaced now. (cylindrical caps are replaced – and as mentioned transistors and diodes seams to be ok).

     

    BR Behsen

    in reply to: Beogram 4002 (5511) – turns on when it is turned off #8941
    Behsen
    BRONZE Member
    • Topics Started 1
    • Total Posts 5

    Thanks Mark.

    I have now replaced all of the cylindrical capacitors – and actually also TR1. If the switch you’re mentioning is the on/off switch – I have cleaned it several times. ¬†Nothing has helped so far.

    Concerning diode D1 – I think that what you write is according to and earlier version off the turntable (type 5501 or 5502). I have type 5511 – so I might have to look upon D5 instead (but I’m not sure because I don’t have the right version of the service manual).

    BR Behsen

    in reply to: Beogram 4002 (5511) – turns on when it is turned off #8912
    Behsen
    BRONZE Member
    • Topics Started 1
    • Total Posts 5

    Actually I had a few (6-7) capacitor’s and I did solder them onto the pcb. Apart from that I’m not sure about how many components I would have to replace. Is it only capacitors – or would it also be transistors etc. And if it would I would need some help in finding the correct ones.

    Could there be other reasons for the issue I have described. Broken lamp – /week censor light etc. ??

     

     

     

     

Viewing 4 posts - 1 through 4 (of 4 total)