DJI S800 Product Bulletin - ESC too high temperature
- Thread starter nisouck
- Start date
BorisS
Drone Enthusiast
Infos on the repair procedure or send in:
Check the attachments for the procedure if you want to repair it yourself.
View attachment 5002View attachment 5003
Check the attachments for the procedure if you want to repair it yourself.
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I am doing the self repair. After three arms, I am not sure that I would recommend it to anyone. I am ok with the soldering part, but the conformal coating that they used is a PIA. I have had two partial tares of pads because of the adhesion of the coating. It is next to impossible to get all of it off where the leads and SMD resistors are mounted. I am going to finish it out and do some tests. If it doesn't work, then I am taking the escs off and returning them for replacement or repair.
To desolder the motor leads and the 4 leads from the arm is simple. I use a Dremel Tool wire brush connected to my drill to clean the coating off the leads. The coating is to control moisture, or at least that is what I was told by DJI. It looks like a silicon conformal coating. I got some urethane conformal coating at Fry's. Performs the same function but not as thick as the silicon.
What takes the time is bridging the SMD pads after you remove the resistors. The wires are about 2.5mm long and it takes a micro tweezer to hold them while you try to solder the small pads. I remove what I can of the coating, remove the resistors, clean with Isopropol alcohol, clean again with the wire brush then more alcohol. Apply flux, and use a very small tip to solder. I am using magnification the whole time. After I am done, more alcohol and a close look with higher magnification. It is very time consuming. If there was no coating it would be a relative simple task.
What takes the time is bridging the SMD pads after you remove the resistors. The wires are about 2.5mm long and it takes a micro tweezer to hold them while you try to solder the small pads. I remove what I can of the coating, remove the resistors, clean with Isopropol alcohol, clean again with the wire brush then more alcohol. Apply flux, and use a very small tip to solder. I am using magnification the whole time. After I am done, more alcohol and a close look with higher magnification. It is very time consuming. If there was no coating it would be a relative simple task.
I hope others have had better experience dealing with UAVproducts (Robert Remund). My experience was negative. I purchased a HEXA from Robert and sent him a little over $5,000 dollars to build . I received confirmation that he received payment, but Robert never returned any of my calls or responded to any e-mails, I began to wonder if DJIUSA really existed. I finally did receive the Hexa, and was happy with the work, but Roberts lack of response to a paying customer is unprofessional. I did have one question about his build, which I e-mailed and phoned, Robert never replied.
I soon decided to purchase an S800 and decided to give Robert another chance. I actually talked to Robert on the phone and discussed the S800 invoice that he was going to e-mail. I never got it. After many e-mails and phone calls , nothing. I finally gave up but was lucky enough to find a vendor on the west coast Century Helicopter that had an S800 in stock and was within driving distance (20 minutes). I am sure that Robert has loyal customers that he is responsive to, but I clearly was not one of them.
I am still going through the process of determining whether my S800 is affected by the recall and hope that other S800 owners receive a satisfactory solution to the problem without making things worse. So far I have flow the S800 approximately 20 hours.
Sent S800 to Century Helicopters for rework last friday. Got S800 back and things are good.
I soon decided to purchase an S800 and decided to give Robert another chance. I actually talked to Robert on the phone and discussed the S800 invoice that he was going to e-mail. I never got it. After many e-mails and phone calls , nothing. I finally gave up but was lucky enough to find a vendor on the west coast Century Helicopter that had an S800 in stock and was within driving distance (20 minutes). I am sure that Robert has loyal customers that he is responsive to, but I clearly was not one of them.
I am still going through the process of determining whether my S800 is affected by the recall and hope that other S800 owners receive a satisfactory solution to the problem without making things worse. So far I have flow the S800 approximately 20 hours.
Sent S800 to Century Helicopters for rework last friday. Got S800 back and things are good.
Last edited by a moderator:
david.scarbrow
Member
Boris...same as. From what I can'see' here the whole DIY process sounds complex, difficult to complete perfectly, lengthy in time and requires additional tools...opportunities to make lots of mistakes. I'm sending all the arms/booms complete but minus the props to a pre-defined organisation in Switzerland for the repair. It's going to take some time but I believe it is a better move for me to make it happen thisd way. My only concerns are lack of info from DJI (are they repairing or replacing the ESCs ?), mis-info from other sources (DJI are compensating relevant customers in some way) and the fact that I will be picking up the tab it seems for the reasonably expensive courier costs.
This post on RCG explains it all with the attached video:
http://www.rcgroups.com/forums/showpost.php?p=22088770&postcount=189
http://www.rcgroups.com/forums/showpost.php?p=22088770&postcount=189
ChrisViperM
Active Member
Thanx for the link...I am just sitting here and thinking what to say without beeing called a DJI hater. First...some GPS's had an issue, then we had to send the arms for replacement 'cause the ESC's have to be exchanged....now it's not the arms but the WooKong M....even the supports for the landing gear did not fit...the LiPo's are dangling around 'cause no battery tray.....
But I can see the marketing department alredy working overtime:
Preorder Francy: If you buy a S800 now, we will ship it with a brand new multimeter, a Dremel Tool and a soldering station....
Slowly this is getting highly entertaining
But I can see the marketing department alredy working overtime:
Preorder Francy: If you buy a S800 now, we will ship it with a brand new multimeter, a Dremel Tool and a soldering station....
Slowly this is getting highly entertaining
plingboot
Member
…so, if i have a wkm sitting here unused (from a previous build) and waiting for me to have the cash for an S800, will DJI swap out that MC for a new one when i make my purchase?
Also, have DJI made any comment about the stock dealers are currently holding?
Is all to be returned/modified etc? Would be good to know what the situation is for available S800's
I assume the from date "X" (to be advised by DJI) all S800's will have this issue sorted?
Also, have DJI made any comment about the stock dealers are currently holding?
Is all to be returned/modified etc? Would be good to know what the situation is for available S800's
I assume the from date "X" (to be advised by DJI) all S800's will have this issue sorted?
ChrisViperM
Active Member
...but this one is the best statement so far:
http://www.rcgroups.com/forums/showthread.php?t=1677105&highlight=s800&page=13 - Post #195
"If you own S-800 requiring ESCs change you will get OSD transmitter free. Only the transmitter and only 5.8 Ghz 500mw; no receiver. Likely we will ship the transmitter with battery tray."
Even in this mess they are trying to reach into your pocket...get a transmitter free...but buy a receiver..........I like it
http://www.rcgroups.com/forums/showthread.php?t=1677105&highlight=s800&page=13 - Post #195
"If you own S-800 requiring ESCs change you will get OSD transmitter free. Only the transmitter and only 5.8 Ghz 500mw; no receiver. Likely we will ship the transmitter with battery tray."
Even in this mess they are trying to reach into your pocket...get a transmitter free...but buy a receiver..........I like it
david.scarbrow
Member
I have just sent an email to DJI copying the repair dealer in Switzerland on these 'issues' requesting more detail...
1) Are the ESCs being replaced or repaired (who makes the decision to do what)
2) My MC was ordered by me via a UK dealer before 30/08/2011 suggesting that it was built before January 2012 and therefore should be replaced
Or have i just read a load of mis-information ?
snurre
Member
Bulletin quote
"We are in the process of a voluntary replacement of WKM MC manufactured before January 31 to all S-800 owners."
I did not buy a S-800 but I bought a WKM, end of december 2011.
Used on an octa, ESCs mounted under each motor.
- Where does that leave me in this?? :upset:
"We are in the process of a voluntary replacement of WKM MC manufactured before January 31 to all S-800 owners."
I did not buy a S-800 but I bought a WKM, end of december 2011.
Used on an octa, ESCs mounted under each motor.
- Where does that leave me in this?? :upset:
skivvie
Member
Contact the s800@dji email, or post in that thread. I'd wager they will take care of you. They are horrible at information spreading and with the time it takes to reply, but they are actually taking care of those affected pretty well. It all sucks and is frustrating but I just want my damn heli flying and get get past all this.
piccoloflyer
Member
when you receive your free transmitter, sell it , should get $100 for it or buy an cheap receiver from Foxtechfpv for $25
ChrisViperM
Active Member
...I doubt I get a $ 100...value of DJI products is dropping by every minute...
Sorry, I know my statements don't conribute in a productive way to this problems....but it helps to cope with the frustration for being treated like a stupid schoolboy from this company...