Speed Control and adjustment
The front panel contains a two-position pushbutton switch for selecting either 33 RPM or 45
RPM operation. Pressing the switch either latches it in or releases the switch to its outward
position for 33 RPM operation. There are separate speed adjustment controls for 33 and 45
RPM. The controls have a detented center position that is factory calibrated for 60 Hz (33 RPM)
and 81 Hz (45 RPM). The speed is also continuously adjustable +/- 3 Hz for fine tuning of the
platter speed using a stroboscopic disk and 60 HZ light source. Blue LED indicators adjacent to
the controls indicate which speed is set at a glance.
Motor Stop and Run
The platter is started and stopped by the front panel Run/Stop momentary pushbutton switch.
There is an LED indicator the glows red when stopped and green when the platter is turning.
System power
There is an IEC power module on the rear panel to supply AC power to the ADS. The IEC module
contains a fuse drawer that holds a 1-amp slow blow fuse protecting the ADS from electrical
system malfunctions.
AC power to the ADS is controlled by the power switch located on the left-hand side of the front
panel. When the ADS is powered up, the indicator in the switch glows blue indicating the
internal power supplies are functioning properly.
Output to Turntable
The 125 VAC max output to the motor is supplied by the identified AC receptacle on the rear
panel. The receptacle output provides a maximum 15 watts. Higher wattage loads will seriously
damage the ADS.
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