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The power switch needs to be mounted in the orientation shown with the two terminal in the "low"
position. This is necessary so that it matches the rear labeling where the handle in the "up" position is
"on".
These power connections are very important to get right. The four wires to the rear
switching supply need to be in the order shown above from right to left, Red, Orange,
White, and Black. Double check! Don't get the order wrong and don't get the order
Make sure there are no wire strands shorting from one power
backwards!
pad to the next one!
JP2 has two pads, one for +12v, the other for ground as labeled in the picture above. The pad to the right
is +12v as shown and goes to the power switch. The left pad is ground and goes directly to the ground
Double check! Don't
lug on the power jack, which is not shown as installed in the above picture.
get the order backwards!
The radio is diode protected against reverse polarity using a high current, low voltage drop Schottky
diode. It does drop the voltage 0.15 to 0.3v, but it is worth the protection.
Figure 113. Placement of the switching supply tin on the back chassis, power jack not installed.
The switching supply tin needs to be mounted on the back side of the radio as shown above. The first
step in doing this is placing the switching supply inside the tin, centering it top and bottom, and marking
where the two mounting holes need to be drilled in the tin.
Norcal NC2030 v5
12-18-05
Page 91 of 128
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