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You only need to do this step once. The standoffs can remain attached to the template permanently.
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Identify the green Assembly Template PCB. It has the part number TD-OCSE-D-AT printed on it.
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Note the orientation of the board. Standoffs will be installed on the side that says THIS SIDE FACES DOWN.
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Locate three M2.5 × 10 mm standoffs.
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Secure each standoff using one M2.5 × 6 mm pan head machine screw, in the three locations shown.
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Flip over the completed Assembly Template. It is now ready to be used.
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Identify the Main Board assembly PCB. It has part number TD-OCSE-D2-MB printed on its bottom side.
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The Main Board should have all surface mount soldering already completed before continuing.
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For ease of access to the pads, it is recommended to solder component H5 before continuing.
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Do not solder any of the following components yet.
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Place components S1 and S4.
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Place components S2 and S3.
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Place components J1-12.
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Note that four pairs of these components each share a common hole for their grounding pins.
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Locate the white plastic Assembly Spacer part.
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Make sure that the flat side of the Assembly Spacer is facing up when orienting it relative to the board.
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Position the Assembly Spacer above the four components S1-4 and slide it down onto them.
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The Assembly Spacer should rest on top of the four components with no gaps. All four component shafts should be extending upwards through the Assembly Spacer, as shown.
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