HOW DOES THE MAIN SILVER PLATE COME OFF. I CANT SEE ANYMORE SCREWS HOLDING IT ON? ANY ADVISE OUT THERE??

just inherited a beogram4002. everything works beautifully on it but one thing. the stylus will not drop onto the record?....every button works on it except the up/down arrows button.i live in So. Indiana but know of no one that services them..Any advice out there......