Replacing serface mount components with a £30 reflow station WEP 858D

Using a cheap £30 solder reflow station in a home workshop WEP 858D. To replace components on a surface mount PCB. Moving a component from a donor board and replacing it on the failed board.

[@danfuerthgillis4483]

This Unit is rock Solid!!! . When using any Rework Station you have to use Rosin Flux ( paste or liquid) it should be mandatory. I can take and install any SMD even tiny little ones with no problems with this Unit. For the Price this thing is a steal!!

[@cliffchism9187]

I just ordered a reflow station tonight and your video was very helpful in learning how to use it. Next step is replacing a stepper motor driver on a 3d printer board. Thank you for the info.

[@DevelopIT]

Thank you for the feedback.

[@pippashaw8224]

Plumbing Flux is corrosive As Danfuerth said, get the right flux for PC work and it would help to add some 60/40 leaded solder this will lower the melting point of the solder on the board. you can put some Kaptan tape around the part to be removed this will help to protect the items that are close. you done a great job 👍👍👍

[@DevelopIT]

These are all good points. You'll be relieved to know that I eventually got some proper flux that I use now.

[@TheKetsa]

Do you think you could remove that ST "SMOOTH" chip on the right with this ?

[@MrTarmonbarry]

For anyone buying one of these cheap rework stations , please open it up and check the wiring etc inside . I bought the 875D and from previous videos i had watched before i decided to check it out . There were some major issues inside . The 875 has two transformers because it has the soldering iron as well as the blower , they had stacked them in a very very bad way , also the earthing is suspect with none of the chassis grounded . I bought some short bolts and remounted the smaller transformer and added earths to everything. There is another mod some people do and that is the incoming power , when you get the unit the power is switched on the negative ( blue in the u.k) and not the live . Some people change it others do not , as long as the thing is properly earthed i think it makes little difference

[@erikmaki8642]

Hi Jason. Thank you for posting. Did your drive work afterwards? I would need to do the same BIOS swapping on a Seagate HDD and I am honestly a bit nervous. Is there anything you would do an other way?

[@dorfschmidt4833]

+Erik Mäki There are some phone repair shops, which do board level repair, they would probably do the solder job for you for a small fee.

[@erikmaki8642]

+Dorf Schmidt I was also thinking something similar solution. Thanks for sharing.

[@DevelopIT]

+Erik Mäki Sorry for the delay in replying. The chip I replaced here was not the flash, the flash is the other 8 pin device on the board. I accidentally swapped the wrong chip. I've still to go back and swap the correct chip, I'll do another video when I do. It still may not fix it though as, although the board and revision number is identical, the cache chip size is different and the drive manufacture using the board is different. The drive is just from my failed DVR, so I'm just doing an experiment to see if I can do it.

[@WilliamVG]

Do you recommend pre heating the board before using the hot air station?

[@DevelopIT]

I have never done that, so I don't know. Sounds like a good idea.

[@dorfschmidt4833]

Hello, would you recommend a 858D hot air station ?

[@DevelopIT]

+Dorf Schmidt Yes, but I have not used any other make or model, so I don't have anything to compare it to. The plus I see mainly is, it's so cheap, if it breaks, just replace it.

[@associativemicrosemantics3930]

I know someone (currently doing a PhD in Engineering Science) who has used it for years now and recommended it to me. I bought mine for 29€ and it works well so far. Good value!

[@dorfschmidt4833]

@@associativemicrosemantics3930 Bought an ATTEN ST-862D hot air station at the end.

[@barmakkhodajan6447]

Don't forget to use som flux would make everything much easier.

[@user-iu7eu3vr1o]

How much temperaturedo you peel off the chip? 100 200 500 1000? How?

[@DevelopIT]

I used 380 in this video.

[@user-iu7eu3vr1o]

Thanks

[@alexgomez946]

never use plumbers flux! use only electric rosin core.

[@SuEnRoD]

My thoughts exactly! Plumbers flux is acidic and will cause major problems in the future

[@muppetpaster]

HAHAHAHAH use S39

[@terminator7256]

'Rosin core' means solder with flux inside. It's just called Rosin flux. There are other types of flux that can be used, such as no-clean formulas. Otherwise, the residue must be cleaned from anything you put it on. It's an acid that corrodes or oxidizes over time, if residue is left over. Isopropyl alcohol works well for cleaning, and it's a great way to prepare anything for soldering.

[@danthegreat7590]

How many degrees did you use

[@DevelopIT]

I think it was 380 in this video, I generally use 400, try to just target the legs and avoid the body of the item being removed.

[@sharpeyedwatcher9724]

Apply fresh flux to the chip you want to desolder and protect the components nearby with foil tape stuck around the chip for removal.

[@dbsirius]

Isn't Kapton Tape batter to use?

[@muppetpaster]

@@dbsirius Isn't that foil tape?

[@dbsirius]

@@muppetpaster foil tape is different. It looks like metal. But Kapton tape is a translucent brown/orange colour and can withstand high temperature, while being an insulator

[@muppetpaster]

@@dbsirius Are you really trying to tell me the concept of Kapton tape? WAHAHAHA

[@muppetpaster]

@@dbsirius Kapton still is a type of foil (=film)

[@garryharris3777]

Be careful not to turn the air up too high. You can unintentionally de-solder surrounding SMDs and blow them out of place

[@MK-qo1rz]

going to get one... to attempt a scary Xbox one hdmi port fix.. 😓😓😓

[@cliffchism9187]

Your comment just reminded me that I have a Chromecast with a bad micro USB connector. Now, I can't wait for my reflow station to get here, so that I can try and repair it.

[@Megalocade]

Its always scary doing it for the 1st time, I remember doing my first which was a small 4 sided sound fx ic on a capcom CPS1 board I was bricking it because the board was a lot of money, I did quite a few test runs on on junk boards, but I did it and it looked good, I bought one of these a while back and it works well for the price, I repair arcade machine game boards and monitors and this has come in handy when changing out big to small ics, I only use it to remove ics never to install because I dont want the new ics getting to hot even though they are build to take some heat, I prefer to drag solder new ics down with rosen flux, I usually run some solder wick across the pads so they are cleam and flat then place the chip on and solder 2 corners, flux past all round and the put a tiny bit of solder on my iron with chisel tip and just lightly drag across the legs, then clean it up wirh some electric contact cleaner on a cotton bud.

[@DevelopIT]

That makes sense, especially for Arcade machines that are on for long periods of time, care not to shorten the life expectancy of the component.

[@Toqhy]

I use kkmoon 858d 700w it won't desolder the same smd like what's wrong it's brand new nothing is soldered I use reballing machine 4800 watt works perfect but the doesn't work please reply as fast as you can

[@DevelopIT]

Putting some flux on the solder to be melted before heating it may help. I use 400︒C generally, but recently I needed to unsolder an ESP32 and had to increase to 450︒C to get it done.

[@Toqhy]

@@DevelopIT but I use amtech Flux it shows the smell and the gas of the solder but it won't move like it's like super solder

[@DevelopIT]

@@Toqhy That is strange from what I have seen from other people, usually SMD solder melts at a lower temperature than 60/40 solder. I don't know what is occurring.

[@DevelopIT]

@@Toqhy is the back of the SMD component soldered to the board as a form of heat sink, this would anchor the component much more securely.

[@MrTarmonbarry]

This is probably to late for your needs but there is a thing called chip quick , you add it to the existing solder and it lowers the temperature it melts at

[@discoHR]

Clean the pads with flux, wick and some fresh solder using classic soldering iron (pen) before soldering the new component on the same place.

[@FuchsHorst]

discoHR exactly this. Use leaded solder for a lower melting temperature. Watch Louis Rossmann and Electronics Repair School on KZbin.

[@laptech3767]

Flux is important

[@keithcoltron3171]

Doing this on video first time is not a good idea, I saw the chip 'settle' almost 30 seconds before you removed the heat, doing it on video is so much harder so I suggest you do runs off video and I'll bet you will soon get better and enjoy it but you did ok just cooked the chip much longer than needed so practice off video!

[@keithcoltron3171]

Oh and for Gods sake DON'T use plumbers flux aaaaaaaaah!!!

[@DecibelAlex]

works just as well

[@muppetpaster]

Why not use Solarflux? HAHAHAHA