I have been successfully repairing P2V+ camera/gimbals for almost a year, with moderate success. Basically swapping parts, circuit boards and ribbon cables, until recently. It almost seems like there is a software "reset" that is performed at the factory service center, and I will believe that until someone can prove to me otherwise. As long as DJI is NOT willing to sell pitch/roll/main circuit boards, roll motor/bracket assemblies, (motor is pressed into bracket), (there is a new, steel insert, factory mod now), it will be difficult to establish a base point to identify suspected faulty components. I actually had one unit with a burnt cable at the camera module connection, still fully stabilizing all gimbal motors. I even swapped out EVERY roll motor circuit board I had, (12, and easiest to get to), even the ones I had deemed bad, (small white burn mark on chip), with steady, no gimbal dance stability. Of course the video didn't work. And, the melting of the ribbon at the camera connection was caused by a suspect faulty main circuit board. I used that circuit board twice, and, yes, you guessed it, fried another ribbon cable in the same exact place. Changed circuit board and ribbon cable, and back to a dancing gimbal; where previously, all gimbals were stable.????? Keep in mind, the good, main circuit boards I deemed "good", because they had functioning red/green leds, but still produced "dancers". BTW, the roll and pitch circuit boards need to be in their prospective locations for proper function. I have tested this and found them to be different. Fortunately they are marked with a "P" and "R".
I ALMOST had a supply of the desired parts from DJI, through the service center in China, until I went to place a $1,500 order, and was then told there was a limit on the ribbon cables of 3. She said she told me that the last time I bought parts.?????? I told her she must be confusing me with someone else, because I hadn't bought ANY parts yet, and besides, why would I purchase only three ribbon cables when you want to charge me $70 for shipping? I had previously told her I get parts from China all the time through ePacket delivery, often free, so she cut the fee in half, (whooptydoo). Then she said I would have to get the parts from my dealer, (oh yah, he's just around the corner, down the street). After many more weeks of talking to very nice DJI dealers, all across the country, who can't even get ribbon cables from DJI anymore, I went back to DJI, China, and got handed over to a new gal who went into the explanation of sending my cameras in for warranty repair, no problem, fix all the time, and finished by telling me, can't sell parts to 3rd parties. They aren't even selling to their dealers! We are all SO screwed!
I currently have 11, yes eleven cameras to repair, and will try again swapping parts. I may get lucky. I DID find a way to secure the roll motor/bracket assy better, by laying the bracket down on a metal surface, (protected by some tape), like the flat space on a vise, and place a 1/8" ball bearing on the hole, where the motor shaft goes. Hit the ball bearing with a small hammer to slightly close the hole, flip the bracket over and do the same to the other side, and then correctly orient the flat on the motor and squeeze the two parts together in a small, precision vise. Can still make a small adjustment after assembly and testing. This method produces a more stable, firm connection between the motor and the bracket, along with better radial alignment. And then, get James McElroy's aluminum, gimbal reinforcement bracket, which will keep the motor and bracket from separating in future crashes. (djiphantomfix.com).
If anybody has more information to share, I'm sure all of us mechanically-minded DIYers would be very appreciative. We ALL benefit.
Cheers,
Jim