Looking at the data sheet for a contemporary Sony CD-ROM mechanism ◆ Service life of feed motor The current consumption of feed motor must be less than initia

Looking at the data sheet for a contemporary Sony CD-ROM mechanism ◆ Service life of feed motor The current consumption of feed motor must be less than initial value plus 30% after 50,000 cycles. (1cycle : innermost track → outermost track → innermost track) ◆ Service life of limit switch The contact resistance must be less than 100mΩ after 50,000 cycles. (1cycle : innermost track → outermost track → innermost track) ◆ Pick-up slide operation The pick-up should operate perfectly after 50,000 cycles. (1cycle : innermost track → outermost track → innermost track)