647 Chair Receptacles, Isolation Transformer Test and Repair

The isolation transformer affects the chair receptacles only.

Isolation Transformer Output Voltage Test

647 Chair Isolation Transformer Output Voltage Test

1.Place meter probes on receptacle screws as shown. Check meter reading.

Meter Reading

Required Action

120 VAC, +/-10%

Isolation transformer OK Replace receptacle(s).

less than 108 VAC

If chair power light is ON, replace isolation transformer. If power light is OFF, check supply voltage.