Lexicon RV-8 Service Manual page 23

Lexicon
Changing the Voltage
This procedure gives instructions for changing an RV-8 from 120V to 220-240 VAC.
1. Disconnect the RV-8 from AC Power.
2. Wait ten minutes.
3. Remove the cover of the RV-8.
4. Measure the voltage on the output devices.
5. Replace the fuse with the proper value (see table below for part number listing).
6. Move the Transformer primary wire harness to the proper connector (see table below for connector
information).
7. Replace the rear panel Voltage label with the appropriate label for the configured voltage (Part
number 740-16015: LABEL,100-120V,50-60Hz; Part number 740-16017: LABEL,220-240V,50-60Hz).
Item Description
1 AC Fuse on Power Supply PCB
2 Transformer primary wire harness
Measuring Power Supply Voltages
In this procedure, testing of the supplies will be performed with the top cover removed
and the unit turned on. Due to risk of shock, do not remove the cover with the unit
powered on.
WARNING
The Amp channels on both sides of the RV-8 heat sinks are Live Voltage. Great care must
be taken to avoid touching these areas when testing for voltages inside the unit.
1. Disconnect power.
2. Wait ten minutes.
3. Remove the top cover of the RV-8.
4. With the RV-8 facing you, locate the switching power supply mounted vertically on the left side of the
chassis.
5. Power on the unit.
120VAC
440-16213
15A
Plug to 100V/120V
connector J15
220-240VAC
440-16212
6.3A
Plug to 220V/230V/240V
connector J14
4-5