alf

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Viewing 16 posts - 1 through 16 (of 16 total)
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  • in reply to: Beogram 4000 record detection issue #6742
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi Craig,

    it worked before the original bulb went dead.

    The “replacement bulb” has a different filament type – it lights up but does not produce

    the correct light circle.p through the lense.

    the correct bulb has been ordered from Beoparts shop yesterday – now its the waiting game until it arrives.

    ALF

     

    in reply to: Beogram 4000 record detection issue #6729
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi Christian,

    thanks for the input, very much appreciated.

    R30 measured 14.9 ohm !

    i revisited that detector bulb, definitely not lighting up, so I put a “replacement” that lit up straight away as expected when 6.3V are present.

    However that “replacement” is not the correct bulb – my hope is Martin (Dillen) can supply a correct one ?!

    ALF

    in reply to: Beogram TX2 solenoid flatter #5949
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi All,

    I played not too bad, scored some nice goals but you can not beat the

    “team of knowledge & experience”.

    A big thank you to Martin who pointed out a potential problem with the white tumbler bar and its free movement. One small spring, kind of embedded in the chassis, attached to that bar was obstructed in its free movement by a particle and so was the bar’s movement.

    the solenoid”s piston had to work overtime and only just overcame that extra force after some rattling forth and back.

    all is well now, everything is recapped, lubricated and ready for playing some nice records again 🙏🏼😁😁😁🙏🏼

    thank you also to all interested followers – it was a great new chapter to learn.

    ALF

     

    in reply to: Beogram TX2 solenoid flatter #5943
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi,

    well, C3 and C4 on #2 board have been replaced but no change in the lifter issue.

    i like to exclude the lifter/lower gear wheel as it performs basically the same task at the run-out groove of a record without any drama – no stuttering or rattling of anything!

    same thing goes for the piston of the solenoid – leaves me with testing TR4/5.

    As I see it : when the lifter function is activated a fluctuating power supply is fed to the solenoid……what else could it be ?!

    ALF

    in reply to: Beogram TX2 solenoid flatter #5921
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi Mark,

    I  can verify 12.1 VDC at P3-2 and 12.09 VDC at the solenoid. So far I haven’t checked

    C3 and C4 which are easy enough to replace. It had been suggested to replace those two caps but am almost certain both are fine  ?!

    will repirt back once they have been replaced. Thank you for your contribution 👍

    ALF

     

    in reply to: Beogram TX2 solenoid flatter #5913
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hello,

    no, its not what you are referring to !
    A bit tricky to describe but the piston moves freely when it moves.

    what however happens when the lift is activated is that the piston moves forwards and backwards very quickly which generates a rattling noise via the lever arm “connected” to the gear wheel that operates the up/down lift.

    does that explain it any clearer ?

    ALF

    in reply to: Beogram TX2 solenoid flatter #5904
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    hi,

    perhaps a better word to describe the solenoid issue is ‘solenoid rattling’ ?!

    which only occurs when the lift is engaged (< or >)

    ALF

    in reply to: Beomaster 8000 ghost turn-on #5896
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi John,

    yes, I will do that after all those turntables are off the workbench and will repost the findings – wish me luck 👍🤞

    ALF

     

    in reply to: Beogram 8002 motor control issues #5832
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi All,

    still waiting for the Beoparts order…..in the meantime after some research I decided to replace the faulty 92PU51 transistor with a M BD 508 type which is working fine.

    The motor control function is now fully restored and the Beogram is back in business

    thanks to all interested members.

    ALF

    in reply to: Beogram 4002 speed issues #5831
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi All,

    Just a brief summary since I started that post regarding speed issues on my 4002 table.

    replaced were the old speed trimmers with 25-turn Bourns trimmer, a modern speed-switching relay was installed and finally the DC platter motor received new bearing, which in the end settled the issue !!

    all playing nicely again 👍 or should I say “beolovely” ?!

    ALF

     

    in reply to: Beogram 8002 motor control issues #5623
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Thank you for the info – part has been ordered 3 weeks ago – still waiting……!

    ALf

    in reply to: Beogram 8002 motor control issues #5124
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Thanks Mark,

    i will take that on board (if I can find one!!!)

    perth isn’t exactly a semiconductor hub.

    ALF

     

    in reply to: Beogram 4002 speed issues #3859
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    I guess I don’t  have to answer Q3 &Q4 ………

    not something I suspected, but the shop sold me two 2 KOhm trimmers instead of

    5 kOhm trimmers 😡😡

    too much trust is not often rewarded – now both speeds can be set and are in fact

    set now.
    The W/F is very minimal and will improve further after the DC motor has new bearings.

    ALF

    in reply to: Beogram 4002 speed issues #3813
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    My thoughts exactly, the motor should not run faster with a worn bearing !

    running faster is not so much the problem because there are trimmer pots to adjust.

    the issue is that I can not regulate sufficiently down the 33rpm speed – I can do that with the 45rpm speed though.

    i only have one 45 single and can adjust that by ear as I know Bonos voice. To my ears

    the speed sounds correct and steady.

    the same applies to the 33rpm setting apart from the regulating down issue, which I seem unable to do…it is just a tick too fast, which I can see on a strobo disc and hear – I know McCartneys voice.

    both trimmer pots are 5kOhm 25-turn Bourne trimmers.

    Both 2R2 and 1R15 are on the edge of their range but it is still too fast spinning.

    not sure if that is helping a diagnose ?

    ALF

    in reply to: BEOCORD 5000/5500 #3809
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi Lanola,

    sounds like you need to fit new belts.

    see Beoparts shop !

    good luck

    ALF

    in reply to: BeogramCD 6500 focus issues #1658
    alf
    BRONZE Member
    • Topics Started 8
    • Total Posts 24

    Hi All,

    I replaced IC 6104, readjusted the Focus Offset (=410mV), checked the laser current (=48mV) , replaced the drawer belt with an interims one until the original one will arrive.

    so far the player works fine again, although I am not entirely sure what impact exactly

    the new IC6104 caused ?!

    For now ‘case closed’

    ALF

Viewing 16 posts - 1 through 16 (of 16 total)