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Figure 2 - Power Supply Unit Terminal Jumpers
11. Check and make sure that the jumpers are installed as shown in the picture above. If the terminals
are missing, either order replacement jumpers, or you can fabricate replacement jumpers with 16
gauge AWG wire and ring connectors available from any electrical supply store. Replace any miss-
ing jumpers
12. Connect an AC power cord into the power entry module on the power switch bracket located on
the back of the power supply assembly.
13. Turn the power switch on.
Figure 3 - Power Supply Indicator LED
14. The green LED located on the top right side of the back of the power supply unit should immedi-
ately illuminate.
a. If the green LED is not illuminated, measure the A/C input voltage at the location shown in
Figure 1 above. You should be getting 110V or 220V AC ±10% depending on the wallpower
supply. If you have no or low power input at these two terminals, replace the fuse.
b. If the fuse is good, but you still have no AC input, verify that the wallpower supply outlet is
supplying sufficient power to the machine.
c. If correct power is being supplied to the machine, and the fuse is good, but the power input is
still too low or none, replace the power supply assembly.
d. If the power input is correct, and the green LED does not illuminate, replace the power supply
assembly. (This indicates that the power supply unit itself has failed.)
15. Use a voltage meter set to measure DC output and measure the voltage output on the upper ter-
minal block, measuring at the middle terminals as shown in Figure 1.
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