Hi All
I have just commenced restoration of a BG 4002 5721
Problems so far
at turn on the carriage/ slide is pushed to the off /right hand side position and the motor for the carriage keeps running.....trying to find out why...
Issues identified so far:
a) Lamp for carriage position (the lamp that shines through the plastic ruler) appears to be blown and intend to replace with LED---could this affect motor shutoff and be my main problem???
b) Tone arm position lamp blown (the one which helps register whether to move carriage lft or right while playing) need to replace with LED and file STL file to print new housing..
c)2 speed control lamps blown (to replace with LED)
d) speed control panel retaining plastic broken on one side..
I haven't had the main motor working yet - condition unknown
on the positive side:
a) Transformer OK
b) 4000uF capacitor for power supply measures at 4700uF
c) Tone arm Solenoid Measures abt 9.1 ohms
d) lamp on beam illuminating B&O logo working (i wonder if is new enough to be led?)
I have not replaced any components on any pcb yet
Can anybody possibly offer a suggestion for the carriage motor issue?
Many thanks in Advance
George
Thank you to our Sponsors
BG 4002 new restoration Start
7 replies
Check out beolover's videos on BG 400X turntables:
https://www.youtube.com/@beolovervideos
thanks Auric
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
George
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..
Any ideas
TIA
George
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..???
Does it say Beogram 4002 or 4004 on the operating panel?
Does the panel have a connector to the "output" board?
Martin
Hi All
i pulled out the pcb's and sprayed all connections / pins etc with contact cleaner
-SHE LIVES!!
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
e)replace cartridge
some measure of relief now
Thanks to those who have offered comments
George
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