You can not be sure which chip scheme is used in your network set-top box, you can disassemble the set-top box to see. Use a screwdriver to pry up the four rubber foot pads on the back of the set-top box, remove the screws inside, and carefully pry open the set-top box along the gap with a blade or steel ruler. At this time you can see the board of the set-top box, if the chip on the board is covered by the radiator or label, you can find a way to remove, so that you can see the chip model.