The mechanism moves the heads off the platters and parks them on loading ramps whenever the drive is powered down or not is the active mode. The heads are lifted off the platters to a detent position, where they are prevented from slapping the disk or eachother in the event of a linear shock. A 168-pin DIMM has two parallel rows of 64 connectors. Diodes An electrical component. Rectifier diode and Zener rectifier diode.
Rectifier diodes have two contact-terminals, an anode and a cathode.
Conduction is forward-biased and will not occur if a positive voltage is applied to the cathode. It consists of either a series of four input rectifier diodes or a four-pin bridge rectifier chip. Zener rectifier diodes , the exception, permits current to flow in the opposite direction. Conduction is reverse-biased. The transition to this state is sharp.