Like many others on this forum and elsewhere my formerly perfect and almost brand new P3A started to develop a 2-4 second lag in the video on the tablet vs the aircraft movements and position. This made flying FPV for shooting video and positioning for stills VERY difficult. Alot of my flying is around buildings under construction which requires FPV flight to position for the video and stills.
After Googling and reading everything I could find, it does appear for whatever reason that the ARM2 chip on the gimbal board was getting too hot and causing the delay. Whether this was a result of additional processing strain on the ARM2 chip due to a firmware update or not, it was fine when I got it and I never crashed it. Same tablet always used to fly. After cracking open the gimbal assembly I, as many others have discovered, found a lack of a thermal transfer pad to transfer the heat from the ARM2 chip to the heatsink . I ordered some thermal pads on amazon but I got impatient. It seemed to me that since the heatsink was milled with contact pads in the heatsink that thermal paste should do the job ( Although the repair directions I found said it won't work). I went to Best Buy and bought some TG-7 from Thermal Take. I put a healthy blob of the TG-7 thermal paste on the ARM2 chip and left the existing thermal pad for the other chips in place. Closed her back up and all is well! No more lag.
I'm still at a loss as to why the lag began in the first place. Unless a firmware update put more strain on the ARM2 chip, there's no reason the lack of a thermal pad or paste shouldn't have created this problem from day 1.
After Googling and reading everything I could find, it does appear for whatever reason that the ARM2 chip on the gimbal board was getting too hot and causing the delay. Whether this was a result of additional processing strain on the ARM2 chip due to a firmware update or not, it was fine when I got it and I never crashed it. Same tablet always used to fly. After cracking open the gimbal assembly I, as many others have discovered, found a lack of a thermal transfer pad to transfer the heat from the ARM2 chip to the heatsink . I ordered some thermal pads on amazon but I got impatient. It seemed to me that since the heatsink was milled with contact pads in the heatsink that thermal paste should do the job ( Although the repair directions I found said it won't work). I went to Best Buy and bought some TG-7 from Thermal Take. I put a healthy blob of the TG-7 thermal paste on the ARM2 chip and left the existing thermal pad for the other chips in place. Closed her back up and all is well! No more lag.
I'm still at a loss as to why the lag began in the first place. Unless a firmware update put more strain on the ARM2 chip, there's no reason the lack of a thermal pad or paste shouldn't have created this problem from day 1.