Page 41 of 80
the LEDs. The switches will guard the LEDs from most casual bumps as you continue the
next section’s assembly.
Install the Controller Power Wire
Identify the free end of the red/black zip cord that comes from TB9 of the power supply
board.
Connecting 5V power and BGND to the controller
Remove ¼” of insulation from the red wire.
Tightly twist the red wire strands,
Remove ¼” of insulation from the black wire.
wire strands, then tin them.
Insert the tinned black wire from the IC side of the controller board into
TB1’s GND pin. Solder it on the switch side of the PCB
Insert the tinned red wire from the IC side of the controller board into
TB1’s VCC pin. Solder it on the switch side of the PCB.
Trim the excess wire length of the black/red wire on the switch side of the
Install the Controller PCB into the Front Panel
Locate qty 4 of the 4-40x1/4” zinc/plated (silver colored) Philips head sems screws (with
built in lockwasher) and a Philips head screw-driver.
Fit the controller PCB into the front panel. Check as before for even protrusion of all the
LEDs through the front panel.
Loosely install the 4-40 screws through the 4 holes in the corners of the controller PCB
into the mounting standoffs on the chassis front panel.
Re-check the front panel to see that it’s seated correctly. If it is, snug up the 4 4-40
screws that hold it in place.
Install the Microcontroller
1. Locate the microcontroller IC. It is packed in its own bag in anti-static foam. Do
not remove it from the foam yet.
2. The microcontroller will be labeled with a paper label that says 1p2 (it may be a
later designation, but 1p2 is correct as of this writing).
3. Grab the chassis with your left hand. Pick up the microcontroller IC, still in the
foam, and set it on the floor of the chassis.
4. Turn the chassis so you have a good view of the empty microcontroller socket,
and a good angle to install the microcontroller.
5. Touch the chassis again and leave your body in contact with the chassis as you
remove the microcontroller from the foam and begin installation in the next step.
6. Install the microcontroller into the socket U4. It’s a 20 pin 0.3” wide DIP, marked
M430G2452 (bottom row of text). Be careful to get pin 1 at the correct end of the
socket by matching the indents in the part, silk screen, and socket (see Figure 24).
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