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Power Supply Inspection
Recheck your work to verify:
1. Correct diode polarity.
2. Correct polarity of polarized capacitors
3. Correct location of power supply voltage selection jumpers for the intended
power source (either 120V or 240 V)
4. Verify that all installed components have been soldered.
Section 4: Chassis Assembly and Power Wiring
We’ll take a detour from PCB assembly to do some of the chassis assembly. This will
give you a safe way to power up and test the power supply.
Protect your PR-101
Spread a towel over your work surface before you begin the steps outlined in this section.
That towel will prevent you from scratching the finish of your PR-101 during these
assembly steps.
Install the feet
Install the four feet into the corners of the bottom of the chassis using 6-32 x 3/8” Phillips
head screws (these are zinc-plated, so will look silver). Snug the screws, but don’t over-
tighten. Installing the feet will protect the bottom of the chassis from damage.
Figure 10-Install 4 feet with 6-32x1/2" silver colored screws
Install the IR Detector Window
{Note: even though this is the NR version, e.g. no remote control, you’ll still fully build
the controller with remote receiver, and install the IR receiver window to complete the
look of the PR-101} A black plastic window sits just behind the front panel. It allows
light to reach the remote control’s IR detector. You’ll find it shipped in its own pink-poly
bag with a die-cut mounting tape. Here’s how to install it:
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