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Document revision 1.3 – Last modification : 21/02/09
MP73 Assembly guide
MP73 Assembly guide
MP73 Assembly guide
MP73 Assembly guide
20.
20.
20.
20. Input transformer
Input transformer
Input transformer
Input transformer
Solder JMP1 (1x4) and the 90° (2x2) pin headers on the SK468
PCB.
Insert the transformer into the
PCB. Check the pin number
matching. Do not solder yet.
Insert the tranPCB
ensemble into the main PCB. Do not solder yet. Place the cable tie
around the transformer, going through the two holes in the main
PCB. Make sure to place the cable tie grip terminal on one side of
the transformer (to keep the total height low). Tighten very
moderately for now. Check the position of the SK468 PCB. It
should be vertical and parallel to the main PCB.
Once everything falls in place nicely solder two transformer pins, then solder the 90° pin header on the
main PCB. Finish soldering the transformer pin.
Tighten the cable tie firmly.
Place the jumper on JMP1.
21.
21.
21.
21. Output transformer
Output transformer
Output transformer
Output transformer
The transformer is mounted using four 30mm M3 screws inserted from the back of the board. The
transformer is directly sited on the PCB, without washer. The screws are locked with four self locking
nuts on four metal washers.
Shorten the leads to the necessary length, around 6 cm. Strip
on 5mm and tin. Insert in the pad hole and bend the tinned tip
flat on the pad before soldering. Cut flush.
The wire colour/pad number correspondence is indicated in the
“MP73 Components layout” document.
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