Ik heb een hoop stabiliteitsproblemen met mijn R7000 en kom regelmatig op community.netgear.com . Nu lees ik daar een post over een design flaw:
Meningen?Gregesp 22-08-2018 05:40 AM
Here is what's going on...
This model has a design flaw. Both the CPU area and the WiFi chip area are not properly heat sinked. If the chips get too hot, they will not burn out, but MAY partially melt some of the solder connections on their many leads. This presents "cold solder joints" and these joints sometimes make connection, while as time goes on, they get progressivly worse. Tiny fractures in the solder are open cavities for airborn contaminants that eventually cause microscopic corrosion within the joint and over time render it useless. The fix is to REFLOW the solder connections at the WiFi chip(s) and then add copper fins to the top of the RF shield above the WiFi chips. In addition, you should also clean all mating sufaces on the bottom side of the PCB between the CPU, RAM etc and all 3 thermal pads there under the shield. I added some "Arctic Silver" to each side of the pads just to ensure good thermal conduction. Scrape off the black paint on the heat sink below so that the large pad makes good contact there. I added a small 2" fan to the outer right hand side of the router. The fan pushes air through the louvers on the right and exits out the left hand side. I used a 12v fan and added a 100 ohm 1/2 watt resistor to slow the fan down for less noise. I have flashed DD-WRT firmware into the router and now can see actual temps of the CPU and also the WiFi chips. Before any mods CPU ran at 61C. After mods, CPU shows 42C WiFi chips had initial lower temps before mods, but were still a point of failure. Now the router is very stable and COOL. Again, you must repair the WiFi chip connections first. Use high quality flux (I used a syringe from Chipquick) and a hot air station for reflow work. The 2.4GHz chip is located under the top RF shield and is at the FRONT of the PCB. The 5GHz chip is in the same location, but to the rear of the shield. Both are Broadcomm and are identical. These mods were the end result of several days of R&D with a FLIR camera to see exactly where the heat was being transferred. Oh...forgot to add that even though the CPU area had good thermal pads and made good contact to the heat sink below, there was still an excessive amount of heat directly above on the top side of the PCB. I measured 125F according to the FLIR. I removed the two CUBE size pads from below the PCB (which really did nothing in that location) and placed one directly below the 2.5GHz WiFi chip so it would add additional cooling by contact from the bottom of the PCB to the larg heat sink. The other cube was used on the top of the PCB directly above the CPU. I made my own heat sink from copper flashing (about a 2" square) and mounted that above the thermal cube to conduct any remaining heat AWAY from the PCB below. Lastly, all this work may be overkill. A simple fan mod may do the trick, but I wasn't going to take any chances after all the research findings. Netgear really cut some corners IMO. The hardware is good, OS is OK, but the weak link is the heat issue. Relying solely on convection from a heat sink BELOW the source of heat (heat rises folks!) is a really bad engineering mess. Not designing in a simple $3 fan is a recipe for disaster. Hope my findings help someone. After reading 17 pages here on the forum with no answers I simply had to post my findings. Good luck.