I have a newly acquired Dual 621, when moving the auto play lever to ‘play’, The strobe light illuminates, but the motor does not start. When I spin the platter manually, the tone arm cycles properly, so no issues there. I assume this is a capacitor issue. I can solder ok, I have replaced caps on speaker crossovers, but I don’t know how to troubleshoot the power supply issue here.
Any help appreciated!
Thanks
Any help appreciated!
Thanks
The circuit diagram is available on vinyl engine and there is a 47uf capacitor ( C13 )across the motor but as it controlled by 2 chips they might need checking .
Check T3=BC238C & T4=BD415 in series with the motor .
You should get 20.5 volts DC from the power supply ( or there abouts ).
Check T3=BC238C & T4=BD415 in series with the motor .
You should get 20.5 volts DC from the power supply ( or there abouts ).