Land Rover Locked KVM. Can't program new key. MCU Replacement.
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- เผยแพร่เมื่อ 28 ก.ย. 2024
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The clear coating is called a conformal coating it is used to protect PCB’s and components from moisture/liquid damage. There are chemical conformal coating removers widely available on the market. This stuff was the the bain of my life when I worked repairing aircraft avionics modules.
Acetone to CHCL3 will probably do the work, anyway anything under the chip cannot be removed by a solvent
I had also suffer from this but I had cleaned with petrol those coat were remove easily but I can't understand what type of coat was done by company 🤔🤔🤔
conformal coating can be removed with IPA sometimes, depends though as there are different types. The one we used would come off with IPA no problems, or Microcare heavy duty Flux Remover
You can use toulene or epoxy dulient it will melt the resin off 100% guarantee...
Lemon Juice and (store/shelf/.3%) Hydrogen peroxide or fingernail polish can be used if you don't have Acetone or remover, or if it's late and stores are closed. Still needs a bit of heat to activate though...
Or if you live in Alaska and don't have reliable access to places like Amazon or other online stores.
The lemon juice and h2o2 mix has to be thoroughly cleaned up though because it will cause corrosion and will short the board. So clean with soapy water and a soft tooth brush, then rinse thoroughly, then rinse thoroughly with IPA.
I have a story about one of these. I am also an automotive locksmith. We run a lot of calls. This vehicle requires a lot of work to make the key. If we have to take things apart, remove panels, instrument clusters, open modules we send them down the road. Range Rover is one of these. We had a customer call just for a lockout. We opened it up and her keys weren't inside so she towed it to the dealer. They told her we ruined her KVM by unlocking the car without a key. They wanted $2500 for a KVM and close to $1000 for the key. The lady called me not blaming my company but she didn't know what to do. I told her they were full of BS. I had the car towed out and another locksmith who does all the high end stuff programmed a new fob for $650. This lady was so thankful for me helping her out. I hate these dealers. Always telling customers false information.
Those main dealers love to rip the arse out of anyone. I had a customer that had a totaly flat battery, and the mechanical door lock never worked anyway, so he only used the electronic key fob, the call out service jacked his range rover up & temporarily put a power pack on the starter motor/ solenoid which gave him enough power to quickly undo the door.
wow @@merlin5476
It is always a pleasure to work with customers who understand and appreciate the efforts you are putting in order to make the job done. Another amazing video💪
Bot
True. Conformal coating is a nightmare to all repair shops. There's actually a solvent that can remove conformal coating, but I forgot what. It's not even commonly used in the industry where they use conformal coating treatment for their customers. The purpose is not only to protect the board from moisture/liquid attack, but also most likely encouraged that the board is non-repairable.
try MICROCARE SUPRCLEAN
Electronic boards are coated to prevent corrosion.
Three types of coatings are;
Acrylic resin
Silicone resin
Urethane resin (Polyurethane)
To dissolve these resins there are solvents to do this with BUT you have to be careful not to also dissolve the PCB board as well.
Acrylic resin can be dissolved with Acetone (very strong) and Xylene
Use a Q-tip with sparing amount of solvent on it and mask area around the electronic component with painter's masking tape.
Silicone resin use Dicone NC-9 on Q-tip using same method.
Urethane resin use Isopropyl 99%
Since there is no way to know which resin was used, start with the Isopropyl to see if that works.
If not then knowing that Acrylic would be the most obvious choice as a coating, I'd then use Xylene.
But make sure you mask off the area.
If no effect then use the Dicone.
It is safe on PCB's
Thanks for your time 😊
Wow good job in dishing out these information thanks
PCB Board 😂 Sorry - bit of an inside joke
The most importand question about it is not how to remove it or "he does not like it". The question is why it is not put back on. it can be just a coat of clearcoat. Car needs this for moisture and humidity changes. I understand the hate , but it it there for a reaseon and decent repair would end with that coat or similar back on there. Also thanks for good explanation.
It's a thin conformal coating and not at all hard to deal with. I use plastic scrapers to remove the bulk of it.
I have worked on similar module and I have successfully made this mcu virgin few months ago. Without removing from the board.
Alex, have you tried any of the proprietary conformal coating removers like 8309? I think they need to be used outdoors so may not be practical for your area. Keep up the great videos and well done with this one. 😀👍
... and if I’d realised the chip was the wrong way up I’d probably find something to stub my toe on before repeating the job.
Welcome to our world Alex, the automotive electronics.
This is one of the easier ones
Nicely done
The customer is very generous, pays well and brings interesting stuff to work on and content for the channel 😂😂😂
I loved the way that stuff scrapped off so satisfying
We had that conformal coating on every thing we worked on in the Military way back in the 60s. Had none of the fancy tools and even soldered in electron tubes . The once you dig thru the coatings the traces would come off the PC board if you just looked at it.
Different but still very difficult. Love your techniques.
Great work! Chemicals aside, what about using a square window aluminum layer to isolate all the components from the chip area. That could prevent 'browning' the chip surroundings...
Bro this cot removes with Acetone solution or isopropanol
Your experience make this very difficult job look simple
Interested to know whether the programming at customer end was successful after doing this .. soldering job
I thought you were going to apply that green uv goo at the end to restore that conformal coating
I use a small amount of paint stripper apply with a small brush leave until it starts peeling then remove works a treat everytime , just make sure you remove all the stripper 👍
Always a great learning experience, but you make it fun to watch, too! You may have missed your calling as a comedian😂😂
Try Xylene. Your hot air is too hot…When using to the hot air use a wooden pointed tool to scrape.
Greetings. Thanks always for sharing your knowledge. Major appliances main boards are also coated with that conformal coating.
I use carb cleaner with ear swabs removes that varnish in seconds
It would be cool to know if the repair worked as planned.
Is this a plug and play situation with the chip or do you have to program it before hand?
Flux is everything...wow
That conformal coating is really hard to get off even with the chemicals to do it. I've done it and sometimes it takes days of soaking to get it soft enough to try and remove it.
Your pin1 corner had the extra large feedthrough at it when you first marked it. Later it looks like you used a different corner as pin 1 when you soldered the new chip in.
Many people are saying acetone and it is possible that could work, I don’t know what that stuff is. Jo was thinking to clean the area with MEK, then you can clean with alcohol before heating it up.
I use MG Chemicals 422C silicone conformal coating on PCBs in marine grade beacon strobes. It protects the strobe beacon PCBs installed on oil rigs in the Gulf of Mexico from water ingress and condensation. Luckily the boards are available and under $300 and just get replaced when faulty. But MG Chemicals does make a silicone conformal coating remover "8309" if necessary.
before the desolder you can try acetone or thinner, may be paint remover
Feeling the force the ball is :) Good job though!
Please let us know if the locksmith was able to get that board working after programming the chip.
It is spray plastic for electronics... for moisture protection
Solid work brooo, you da solder master
Would try acetone aswell to remove coating
I like your videos, left one solder ball near the chip😁
Does it not help by putting Capstan tape around the Chip to stop the coating around it from going Brown?
👍 do it right the first time. Does acetone help remove the coating?
Hi.
I have found that most conformal coatings come off with some acetone..😊
O just keep the acetone away from connectors..😊 😉
In our profession fume extractor is the worst thing that you can have. Good ventilation system is the best way to protect your health and from other side you will have always fresh air in the office. Also I use dichlorethan to disolve the coat of these boards.
Is soldering by using solderpaste not a better way for working on TQFP ics?
Interesting -- the ST Micro SPC56 line of ICs are PowerPC-based MCUs for automotive applications.
If i solder a chip on wrong i would go stand in front of my mirror and berate my solder guy about his lack of attentiveness and tell him since he is obviously not up to the task that i will have to do it for him.
I got into key programing because I did recovery. I had equipment for everything until 2013. The bank I worked with went under. People on the street just did not like to pay.
I'm sure they is a solvent that would remove that coat? Acetone?
I use acrylic thinners to remove the coating
I had a ps4 with a busted hdmi port i had to run 32awg wire to all 19 pins. When you said what would you do if you soldered that chip on backwards i remembered how i had ordered the wrong style of hdmi for that specific ps4 and soldered the port on upside down. Turns out there is i think 5 variants of the ps4 and a few have a mirrored hdmi port. Im not proud to said i cryed alittle bit inside when i found out and had to undo all of the work and redo it all over again 🤣🤣
MG Chemicals 8309 conformal coating stripper.
Acetone or even stronger cellulose paint thinner would work but could damage componants like plastic headers & sockets ......................
Most probably "insulating varnish" had used as thick coating on the board and all over parts to prevent any kind of short circuit due to moisture or water damage. I've seen insulating transformer wire windings with this kind of liquid varnish. Most importantly liquid varnish get very taugh and hard after drying against moisture and even certain level of heat. They are difficult to remove after drying but NC THINER can be use to dissolve or liquify it. Best of luck..
hi bro i think there is a coating remover in the market why you didnt use it anyway good workk
I would cut the pins with a sharp knife to remove the IC then remove pins easily
Sana all
Cut the pins may rip some pads off
Carefully with a sharp Stanley knife has been my go to method for many years...never lost a pad yet
@@fritzfischer8084
When you are using low melt solder, do you change the temperature of your soldering iron or does it just stay balled like that regardless of the iron temp?
What would I do if I solder the chip the wrong way? Cry? But really it will come off a lot easier now that the conformal coating has been removed
why not get an exhaust extraction fan ???
With the right locksmith tools there is no need to replace the MCU. You just solder five wires on the board amd reset the existing chip.
Amasing skill Sir
Hi Alex, did the LS manage to successfully reprogram this Land Rover KVM board?
Hats off man.
Oh the fear of peeling off solder pads!
It's amazing the length that Land Rover will go to in order to make it NEAR impossible to find an alternative to a $4,000 board replacement. You know it's really scary when NorthRidge Fix even gets scared to do a chip replacement. 🤣. Well done!
Can't you dissolve the coating with some kind of solvent? If it's shellack it should dissolve in alcohol. Maybe you can use acetone or even toluene (which is quite poisonous)
Conformal coatings protect boards from mechanical and thermal stresses, humidity, corrosives, contaminants like salt and dirt, noxious gases, fungi, and other environmental factors that PCBs in vehicles are likely to encounter. But real question is why is it not used on computer circuit boards
I worked on an ecu. It took a lot of heat to remove parts.
If I done that wrong it would be going up the wall brother haha
You can try to remove coating buy acetone less nail polish remover to me work very good.
Solid. And less flux than Louis Rossmann ;-) mirror mirror on the wall, who does the shiniest micro soldering of them all, ...
Now imagine if this was BGA.
Better than factory!!!
no broken broken pads when you pried the chip up, mashallah
Did it work?
You should add the story to the video when customer brought the problem
i tried to order but you guys dont do South africa
Nice!👍
If I had to solder that chip again, I'd wish for more wishes.
24:51 a challenge indeed
These chips can be read in circuit no need to take off the board
Came for the solid stayed for the solid
Better than factory. wow.
I lost everything when cars insurance went up i had to ditch my car and house for tent.still homless after 15 yrs because I can not aford cars,like I use to befor all car insurance went up beyond what I can afford in this life time.thanks for raising price putting me on street 15 yrs.lIf this was 80s I would have a roof but no more.homles for me for ever its tearfying especially in fl were no shelter or food ware I live.you can not sleep in the woods just on park bench or the gators and snakes will kill you while you sleep.
it is most likely some kind of epoxy or resin and there should be chemicals to dissolve this coat.
Sovent or solder after scraping surrounding area
Solder through
Coating is there to keep dust away
Aromatic solvents like toluene and xylene dissolves
$4K is accurate... ask me how I know
What you DIDN'T do is put the coating back on, since that part is prone to water ingress.
Actually the Autel XP400Pro is able to unlock to chip. Did it several times to add new keys. You only remove a capacity and an oscillator.
But still great work as always
If I solder the chip in the wrong direction, I'll flip the board until it'll align correctly 😜
It will be a moisture barrier, you can buy it here in Australia “circuit board lacquer” to coat the board
when completed
Some kind of solvent might get it off but you can definitely see the thickness of it on the board
If I solder it in the wrong direction I'll throw my self out of the window I don't have that patience to redo it again 😅
How did you manage to ride a camel to work but cant stand a bit of smoke?
Just cleaned with acetone...
love u when r ealaxed and joking , رووء يامعلم
Solid.😅
Depending on the coating used, a solvent or laser or abrasion could remove it
The dark around the chip would be a curveball for a novice when they see the board if it ever breaks 🫣
Conformal coating is great for protecting PCBs from moisture, dust and corrosion. Surprised you don't have any of the conformal coating remover! Sometimes acetone or xylene will remove it too. But the actual special remover can be one more thing for you to plug as you repair. You can talk about the best soldering iron tip, best vise, the lights, the best solder wick, best flux, best tweezers, better than factory and best conformal coating remover. I'll give it three weeks before you discover it and add it to your store. 😉
Did he add it? :)
I work for an engineering company that designs and manufactures custom electronics. A lot of our boards receive this conformal coating. Anytime a board needs to be reworked then acetone is used to strip the coating before soldering.
Your information really impactful....
Wow.
MG Chemicals 8310A - Conformal coating stripper - Gel. Try that stuff out Alex! All the info ive learned from you im excited to pass 1% knowledge to you 💙
Good job with the conformal removal. A few TH-cam channels have various methods of conformal rework, one in particular is "Rework and Repair 'Conformal Coating Removal' " on the Paceworldwide channel. If solvents are suggested, it may be difficult to source if someone is currently in California. There's also a section in the IPC 7711/7721 titled "Coating Removal, Identification of Conformal Coating" which has suggested methods as well.
Just my 2 cents.
The conformal coating has a number of advantages including protection from humidity, debris, and oil. Perhaps it might be useful to be able to remove and then replace the conformal coating. There are pen-like solvent applicators that allow spot removal of the coating.
my razor blade works just fine. on motorbike eeprom the it's usually under a half inch of silicone, then all this bs on top of everything else.
@@markwilladsen5683 Not sure I'd want to try the razor blade on some type of polymer coating on a fine-pitched microcontroller IC. But not surprised that it worked for you.
Looks like a SPC560B60L3 chip. Made by STMicroelectronics. It is a 32-bit Power Architecture MCU for Automotive Body and Gateway Applications. Less than $11.56 for small quataties.
There are coating cleaning chemicals available in the market. You can get the job done very quickly with these.
There are Resin, polymer desolvers and solvents for this but you have to know what type of resin they are using and car manufacturers use several different kinds. But I would say you would find them on the internet. You might have to try different types to see which ones work and which ones don't.
I deal with this conformal coating daily- Use various products to remove it. I liked the BGA Blade idea you used under the chip but did have me nervous about a pads coming off. Obviously experience plays a part to not damage anything. The blade scraped the coating nicely as well without damaging anything. Definitely an "over come and adapt" situation. Nice
What about yellowish rubber-like material that doesnt come off with Acetone?
@@farmdve leave it longer and it will