November 21, 2023 at 1:55 am #26436
Just starting a BG 4002 5721 restoration
at turn on the motor for the sliding carriage starts and moves it to extreme right (stopped position)
The carriage motor just keeps on running try to move carriage – (which cant do any further)
Looking for suggestions to possible cause..
The lamp for the carriage position sensor is blown…(the one that shines through the plastic ruler thing)– Could this be the problem? -I intend to replace with LED
The Lamp for tone arm position is also blown and will replace with LED- this is the lamp to help tonearm follow grooves..
Need to also find STL file to 3Dprint lamp holder
Transformer , power cap(4000uF ) and solenoid all appear ok
Speed control lamps also blown
No items on PCB placed yet.
Dont know condition of main motor yet.
Can anybody poss help with Carriage motor problem?
Many thanks in advance
GeorgeNovember 21, 2023 at 2:20 am #26437auricBRONZE Member
Check out beolover’s videos on BG 400X turntables:November 22, 2023 at 3:37 am #26452
Will have a look through– lots of good stuff there..
After further investigation I ma suspecting that a total recap of the control board may be required…..
Cheers and thanks
GeorgeNovember 23, 2023 at 1:29 pm #26481
Just to add further inof The carriage motor has a constant 18v applied to it when the turntable is plugged into the wall and power is available..
GeorgeNovember 23, 2023 at 2:55 pm #26485
And further discovery..
my BG4002 5521 seems to have an output board from a BG4004 5526…? underneath control switch panel
I wonder what effect this would have..???November 23, 2023 at 3:14 pm #26486DillenFOUNDER Member
Does it say Beogram 4002 or 4004 on the operating panel?
Does the panel have a connector to the “output” board?
MartinNovember 24, 2023 at 8:41 am #26492
i pulled out the pcb’s and sprayed all connections / pins etc with contact cleaner
All required now (hopefully ) is a general clean and following issues
a) speed indicator lamp relay etc- 33 not lighting up 45 (45 is lighting up)- both globes measure ok..
b) adjust Arm position sensor so grooves are tracked more accurately – at this time the pickup arm needs to move excessive distance for carriage motor to activate..
c) General lube
d) Lid repair and polish (big job- may look at making a new one in clear acrylic
some measure of relief now
Thanks to those who have offered comments
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