This document describes how to modify the DM500HD satellite receiver to add USB ports. You can get one external and one internal USB port. This modification is not supported by the satellite receiver manufacturer in any way and you are doing the modification on your own risk. This modification voids your warranty of the receiver.
You buy the USB board and cable at http://www.chargeconverter.com/store/dm500usb . It is available ready built or as a DIY kit that you solder together yourself.
Remove the screw marked with red in the picture and the corresponding screw at the opposite side.
Remove the two screws on the rear, marked with red. Lift the lid carefully (there is one cord going to the lid so the lid can’t be removed completely but enough to put it at the side of the receiver. If you plan to add an external USB port you should remove the metallic parts that covers the three openings marked with blue in the picture above.
To fit the lid with the fan properly, you need to cut away part of the rubber around the USB cable as marked with red in the picture to the right. Be careful to not damage the cable. Attach the USB cable to the rear with the two screws included with the cable.
Remove the resistors marked with red to the right. Usually, only one resistor is fitted. If this is the case, you just remove that one. If you don’t have any soldering tool or don’t know how to desolder these small parts, you can usually use a sharp and small screwdriver and just break away the resistors. Make sure the removed resistors are taken out of the box and not floating around inside it.
Connect the USB cable to the USB board as show in the picture to the right. It is important to turn it the correct way, as shown in the photo and indicated by the colour references on the board.
The USB board is attached to the connector on the DM500HD mainboard marked out with red in the picture above. It is impossible to mount the USB board in more than one direction, so you don’t have to think about how to turn the USB board. However, you should be very careful to align the USB board correctly so all the the pins go into the connector on the USB board correctly, as it is possible to misalign the USB board so only some of the pins are connected.
After you have ensured the board is aligned correctly so the connectors mate each other perfectly you just push the USB board down. Arrange any spare cable so it won’t interfere with the fan in the lid. You can connect an internal USB device like a USB flash memory to the internal USB connector on the board.
Carefully put the lid back on the box and make sure nothing obstructs the fan. Fasten the lid with the four screws.