In this blog post, I am about to explain What are some common uses of a rework station in mobile
phone repairing? to do that let us start form analog rework station overview
Analog Hot Air Station for Mobile Phone Repairing
Now in analog hot air station, there are two knob Air and heater.
best hot air rework station
Heater element exists in Handle that is directly controlled by this knob. If you'd turn it on the button, this red light gets on also, you turn this button as per need.
station power button
when this light blinks.
This light blinks
It means you Heater element Get warm. Besides,
this handle has a heater inside
there is a Heater inside the Handle and it gets it red when the heat gun is continuously on Means is now is too much hot.
Besides a heat gun, you’ll need a few more mobile hardware repairing tools like soldering flux, heat resistant tape, biological knife, screwdriver, Tweezer, BGA reballing paste, and BGA stencils.
If you already have digital rework station and dont know how to do soldering work on smartphone circuits and technical details read this blog post
Some Common Uses of Analog Hot Air Station in Cell Phone Repair
Now how to resolder the components
to work on small components. moved up the knob of heater option to number two.
set on 200
You can also move it to three if you need. one thing very important that the numbers you'll see around the knobs are actually 100, 200, and 300 so you should very careful via using this. If you move the knob to Number two it means 200 and a midpoint is 250. for big components, You turn it on to three and keep air mini. what is mini?
set on 250
mini means that you keep air position on the analog hot air station between two and three.
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hot air gun mobile repairing
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Now Doing Soldering Practical on Mobile Phone Circuit
p sign is the component
Apply solder flux on the components to be unsoldered. Flux soldering paste use
Soldering flux
soldering flux is a liquid paste which is applied at the edges of all IC integrated circuits before resoldering or moving. smd hot air rework station heating and hot air help melt solder paste into the IC beneath.
Solder Flux Demonstration
Then you close it to your component for heating as well as touch the device to absolves the components works or not and keep giving heat.
Heating Component Demonstration
when it gets too much hot Then leave it from the tweezer slowly.
tweezer demonstration
As you can see in the image hold the component from the tweezer and move it very slowly by using finger while giving heat by smd hot air gun continuously the component will separate when silver shine comes as you see in the image.
it gets separate
The same process you can do for adjustment
resoldering demonstration
put the component on the place and give heat gives silver shine.
resolder component
in this image, there are too many components but don't use the heat gun in complicated areas As you can see, these parts that are fixed on the side can easily move or separate by the Heat gun
complicated area is highlighted red in color
but using a heat gun in a complicated area are not allowed.
Now Doing Soldering Practical on All Mobile Phone IC circuits
to solder IC You keep your heat gun heater knob on and keep Air Normal in this picture these ICs
IC is highlighted in red
can easily be removed so set your heat gun on 350 and keep Air Normal If you have too much
heat can set on 350
wait forheating that as per need heat can be little increased
Heat Resistant Tape
High Temperature Adhesive Tape
heat resistant tape is easily available in markets. this tape absolves heat.
apply tape like this
Means if you apply on a specific component, those components do not get hot.
Now Doing Soldering Practical on Microchips
Usually, nowadays microchips are not used in a smartphone.
this is microchip
In the picture, you'll see it. It can be called the microchips. to remove microchips.
Drag soldering
Your heater should be on 4.5 and air would be in normal like med. Remember that you will have to revolve your heat gun while working.
demonstration of revolving
revolving means do not use a heat gun in one position at a time. It must be move or evolve.
Now Doing Soldering Practical on BGA IC Integrated Circuits
Rework Station also called BGA Rework Station. Rework Station also called BGA Rework Station. To work on balls grid array IC you have to use some additional mobile repair tools and components to give heat from the bottom on the IC.
BGA ICs means dose ICs that are punched by machines on a circuit and fixed the corners
pasted IC image
with any kind of glue. To remove this IC. Take a knife that is used in a biological laboratory and feed it
until unless it gets red from the front. remember one thing that paste must use in fixing chips, so take the hated knife and place it slowly, slowly
as you'll see in the video in this process hated a knife easily move into the chip. This BGA chip, similarly remove as previous you're a
for unsolder BGA IC
hater should be on 4.5 and air would be a normal like med use paste and remove the chip but if you place this BGA chip to another circuit, then you will have to make balls.
the Balls have gone
Ball making work is very expensive and demandable.
reballing tools
in the image, This is called BGA Kit.
bga stencil kit
the black paper you'll see is that different Stencil. now Put down the IC under that stencil,
use screwdriver
then you will do it. It becomes balls for pasting the IC.
BGA Reballing Paste
This liquid is the best.
tool to fill the holes
This paste works perfectly and this is strong also as you are watching the process
Professional Soldering Paste
heating BGA with rework station
to remove the IC is the same as you have already seen, but this is very fragile so the heat it lightly
use low air pressure
in this process Keep the air in mad then move it on 3 while working and heat must be in between 3 to 4 when
IC Balls ready
You'll see the little bubbles while heating apply this paste
it means the IC is resoldering Now Stop the heat gun and wait for IC to get Cool.
hold with tweezer
BGA IC balls magnifying glass view
To know the reasons for ICs getting dry soldered read this blog post
Now Doing Soldering Practical on Filter IC
also called VCO IC
These filter ICs. to remove These move heater point on 4.5 and if needed, move to 5 and air always normal.
for removing filter ic
When IC is removed it looks like this as an image
when remove
As you can see these walls are clean by using the soldering iron.
solder wire to clean
Then it places under that kind of net.
apply the heat by hot air station
As these silver prints can be seen then pays the pump bob that is available in the market hold the circuit by using a screwdriver and then apply the heat by the heat gun. if you want to know more about soldering iron, solder station and new mobile repairing tools special price like desoldering tweezers How to Use Them read this article on Micro Soldering Repair Training
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