OHAUS Frontier FC5306, Service Manual, Page: 12 / 23

CHAPTER 2 DIAGNOSIS
Ohaus Corporation www.ohaus.com 2-2
Frontire
TM
Mini Centrifuge FC5306
Service Manual
TABLE 2-2. Equipment motor does not rotate.
SYMPTOM PROBABLE CAUSE REMEDY
Motor does not
rotates
Centrifuge lid cover is not
closed
Defective AC Adapter
Defective motor
Close the lid cover.
Troubleshoot the AC Adapter.
Replace the motor.
2.4. TESTING THE AC ADAPTER
Before testing the Power Adapter, make sure the Power Adapter is original and rating agrees
with the power source being used. The Power Adapters are rated with a universal power input
and output of 24 V dc at 2.0A. Power Adapters can fail by having shorted internal windings
producing low voltage output or no output at all.
1. Plug the Power Adapter in a suitable power source and measure the open circuit voltage
on connector it should be approximately 24V in output.