When you remove the top cover, proceedcautiously in order to not damage thecables of the I/O-Panel and the Active AirChimney. To remove the cover completely,you need to remove the right side paneland disconnect the cable to the board thatgoes to the switch of the Active AirChimney (see drawing).FAN3 FAN2 FAN1POWER SWITCH6. Fan assemblyFive 140 mm fans are pre-installed in your Deep Silence 6. You can mount up to twelve fans intotal.We recommend the use of the 120 or 140 mm Nanoxia Deep Silence fans, available separately.These are technically and visually equivalent to the factory-installed case fans and will work inperfect harmony with the built-in fan control of your case.You can, of course, connect the additional fans to the fan controller (see Chapter 7) or, whereapplicable, to the Active Air Chimney (see chapter 8).All air intake openings of the Deep Silence 6 are equipped with easy to clean dust filters. Werecommend that you clean them on a regular basis.6.1 Fans in the frontTo switch the fans in the front or to cleanthe dust filters, first open the lower frontdoor. Next, open the “Easy Access Panel” bypushing slightly on the left side of the panel(picture 6A).picture 6A12