197577 ⎘
Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor; Arrangements of heads; Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using automatic means; Control of drive of the head for pivoting pick-up arms using optical detecting means
OPTICAL PICKUP MODULE AND MANUFACTURING METHOD THEREOF
#2Optical pickup module and manufacturing method thereof
#3Light monitoring circuit for a manual to automatic turntable conversion
#4Manual to automatic turntable player conversion