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Document revision 2.3 – Last modification : 27/05/21
MP573 Assembly guide – Main PCB, A side
36. Output transformer assembly
Insert 4 M3x35mm countersunk screws into the
side plate. On each screw, insert one 4mm
spacer. Insert the transformer on the 4 screws
and attach with 4 self locking nuts. Tighten without
crushing the transformer frame.
37. PCB & front plate assembly
Place the PCB on the side plate and attach with four 25mm spacers and 4 lock washers. Do not tighten
yet, letting the PCB free to play within the holes size.
Remove the nut on the Grayhill rotary switch but leave the lock washer in place.
Assemble the front plate, watching the LED position and attach to the side plate with 2 M3x6mm
countersunk black screws.
Place the nut on the Grayhill and tighten gently.
Tighten the 4 spacers on the PCB.
38. Output transformer connection
Twist the output transformer wires several times and plug the connector into the main PCB, matching the
white dot positions on the two PCB's.
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