Assemble Pico 20H Odroid XU4

by Craig Brown March 12, 2018

These instructions show how to assemble a complete Pico 20H XU4 cluster.

The instructions for assembling to board stack are here. This needs to be completed for 4 stacks before assembling the rest of the Cube.

Please contact support@picocluster.com if you encounter any difficulties.

Step 1 – Base Panel

Remove the paper backing from the acrylic and screw the board stack to the base panel using the 3/8" screws and washers from packet 1. Mount all for XU4 board stacks as shown, one in each corner. USB ports should face the front and back.

Step 2 – Switch Panels

Remove the paper backing from the switch panels and open the switch package.

Screw the 3/4" M/F standoff through the switch board to the 1/2" F/F standoff on the other side of the switch. Attach the second switch to the the first using the other 3/4" M/F standoffs as shown. Attach the acrylic switch panels using the 3/8" screw and washers. Make sure the orientation is correct. The nut capture slots are at the bottom switch port. The switch power ports are at the top, opposite the nut capture slots. The front of the switch should stick out a bit from the acrylic panels when assembled properly. This needs to be done twice to form 2 switch assemblies.

Attach the switch assemblies to the base panel as shown. Use a screw/washer/nut combo from packet E. It's usually easier to place the nuts in the nut capture slots in the switch assembly, then set the assembly into the base panel, then insert and tighten screws from the bottom.

Place the switch assembly into place in the cluster as shown, then add the switch side panel and screw the switch assemble to the side panel using the 3/8" screws and nylon washers.

Step 3 – Network Wiring

Connect the network cables from each switch to one of the board stacks as shown. Each pair of switches needs to be cross connected to each other at the bottom using one of the network cables. The opposite stacks of switches will also need to be cross connected.

Step 4 – Power Supply and Wiring

Attach the leads for the boards to the left most terminals. They are from left to right [+ positive] [- ground].

Mount 2 power supplies to each side panel using the power supply screws and nylon washers from packet F.

Cross connect the A/C terminals on both power supplies as shown. They are from right to left [L power] [N neutral] [G ground].

Mount the A/C power connector using the 1/2" screws, nylon washers, and nuts from packet F and plug the A/C power input wires to the right most power supply terminals. They are from right to left [L power] [N neutral] [G ground]. Wire 2 of the power supplies, 1 on each panel closest to the power input receptacle the same way.

Step 5 – Back Panel and Side Panels

Attach the side panels to the base panel and side panels as shown. Use a screw/washer/nut combo from packet E.

Attach the back panel to the base panel and side panels as shown. Use a screw/washer/nut combo from packet E.

Attach the fan using the #6 3/4" screws, nylon washers and nuts from packet F.

Step 7 – Front Panel

Remove the paper backing from the front panel. Attach the HDMI and Ethernet extension cables to the front panel using the 3/8" screws and nylon washers from Packet D.

Attach the switch front panel to the base panel and side panels as shown. Use a screw/washer/nut combo from packet E.

Plug the HDMI cable to the HDMI port on the top board, then tuck the excess under the bottom board.

Plug the Ethernet cable to the top most port one of the switches. Bend the cable towards the back. Cross connect the 2 switch assemblies using the remaining 6" Ethernet cable.

Attach the front panel to the base panel and side panels as shown. Use a screw/washer/nut combo from packet E.

Step 6 – Cabling

Plug a power cable from each the closest power supply into each XU4 board in a stack. Plug the 6th cable from each stack into the Ethernet switch supplying each XU4 board stack.