Specifications

This Troubleshooting guide is intended to aid in defining and correcting possible service problems.

Problem Possible Causes Solution

Rotary shaker will not No power to unit Check that unit is plugged into

rotate receptacle of the correct voltage

Blown fuses* Replace fuses*

Defective motor Replace motor

Defective speed control circuit board Replace PC board

Transformer open circuit Replace transformer

Rotary shaker speed will not Defective set point potentiometer. Replace potentiometer

regulate, turns at some

intermediate speed

Rotary shaker runs at full Defective transistor on Replace transistor main circuit

speed, will not slow down board

* M65820-26-60 only

Troubleshooting

Warning

To avoid electrical shock, always dis-

connect from power supply before

maintenance and servicing. Refer ser-

vicing to qualified personnel.