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Analog Hot Air Station 2019

14 Feb 2019

Analog Hot Air Station for Mobile Phone Repairing

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
Now in analog hot air station, there are two knob Air and heater.
This hot-air rework station is great for professionals and hobbyists in need of tight temperature tolerances and large air flows
temperature and air knob
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.
Plug in the power cord of the station to ac current and switch ON by this button
station power button
when this light blinks.
Most hot air rework station has an automatic light feature. This means that when the heater Temperature rich to your set knob the light blinks
This light blinks
It means you Heater element Get warm. Besides,
the heater inside the rework station handle gets red when it leads to his Temperature
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.
the knobs number are actually 100, 200 so uses it carefully
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?
hot air station air knobs number are actually 300, 400 so use it carefully
set on 250
mini means that you keep air position on the analog hot air station between two and three.


Now Doing Soldering Practical on Mobile Phone Circuit

learn to unsolder then solder the component in a mobile phone circuit
p sign is the component
Apply solder flux on the components to be unsoldered.

Use of Soldering Flux
Flux is a very important part of soldering. Flux is necessary to reduce the oxides that tend to form whenever you have hot metals in contact with the air
this is 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 is great for all of your solder, desolder, rework and reflow purposes! For those of you unfamiliar, flux solder flow cleanly onto the parts you are soldering
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.
close the handle to your component for heating the components works or not and keep giving hot air
Heating Component Demonstration
when it gets too much hot Then leave it from the tweezer slowly.
use tweezer to move component form phone circuit is easy
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.
giving heat by hot air station continuously to component then it corners get silver shine
it gets separate
The same process you can do for adjustment
apply soldering flux and heat both ends of the component with the hot air station
resoldering demonstration
put the component on the place and give heat gives silver shine.
resoldering is great for rework and reflow of current properly in the circuit
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
Samsung S6 circuit components highlighted in this image
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
You can see in this picture these types of cell phone solder IC can resolder or remove by hot air station
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
Rework Station for desoldering and soldering of IC mobile phone repairing
heat can set on 350
wait for heating that as per need heat can be little increased


Heat Resistant Tape
This tape is a fantastic insulator, like electrical tape. It also provides good resistance to corrosion and the silicone adhesive holds tight throughout the tape’s rated temperature range
High-Temperature Adhesive Tape

heat resistant tape is easily available in markets. this tape absolves heat.
If you give other components sudden heat the components can get damaged due to thermal shock. the heat resistant tape is used to save them
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.
Soldering Microchip by hand soldering using hot air station for mobile phone repairing is good
this is microchip
In the picture, you'll see it. It can be called the microchips. to remove microchips.
soldering and unsoldering Microchip pet your heat gun on knob on high temperature
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.
revolve your solder station while working do not use in one position at a time
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, while it was not as frequent in older SMD ICs. soldering is more comfortable with the rework station
pasted ic
BGA ICs means dose ICs that are punched by machines on a circuit and fixed the corners
pasted BGA ICs punched by machines on a circuit and fixed the corners by glue
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
set rework station heater on four point five and hot air on normal position
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.
BGA Rework Station using some additional equipment like Pre-heater to give heat from the bottom on IC
the Balls have gone
Ball making work is very expensive and demandable.
If you can hand solder a BGA-packaged IC, requires a master solderer involving flux, templates and BGA paste
reballing tools
in the image, This is called BGA Kit.
pick-and-place IC on the bottom of black paper templates
Universal BGA Reballing Stencil

the black paper you'll see is that different Stencil. now Put down the IC under that stencil,
you can use screw driver to hold the IC on template during reballing
use screwdriver
then you will do it. It becomes balls for pasting the IC.
this reballing paste is used to make balls on BGA IC
BGA Reballing Paste with Scraper
This liquid is the best.
this tool is used to fill the holes on the template with the BGA paste
tool to fill the holes
This paste works perfectly and this is strong also as you are watching the process
when you heat the IC by rework station the paste become balls
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
holding air on normal position and heat it with 350 temperature
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
when the BGA IC balls is ready after giving heat it look like this
IC Balls ready
You'll see the little bubbles while heating apply this paste


It is a necessary material for repairing the mobile phone and other kind electronic's mainboard
Professional Soldering Paste
it means the IC is resoldering Now Stop the heat gun and wait for IC to get Cool.


Use tweezer to postion the Integrated Circuit and to see the ready balls on the BGA
hold with tweezer
use a magnifying glass to see the BGA IC balls before resoldering on the mobile phone circuit
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

to resoldering Voltage Controlled Oscillator on mobile phone circuit always used hot air station
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.
to solder Voltage Controlled Oscillator on phone circuit set smd gun heater knob on 4
for removing filter ic 
When IC is removed it looks like this as an image
to removing crystal clock oscillator form mobile phone circuit set hot air station on 5
when remove
As you can see these walls are clean by using the soldering iron.
to clean Voltage Controlled Oscillator IC print on the mobile phone circuit use soldering iron
solder wire to clean
Then it places under that kind of net.
hold Power clock Oscillator IC by tweezer and then apply the heat by the hot air gun
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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Best Heat Gun Rework Station for Mobile Phones

5 Jan 2019
Let us check out this best information on the market for today's phone repair technician! Heat Gun Rework Station or SMD guns are a very useful tool for soldering re-soldering cell phone PCB basic electronic components. when working on phone printed circuit boards, there is a lot of chance for errors to be made. whether you’re relying on the multimeter or find fault by your own technique, every soldering Rework Station machine has a mind of its own.
Sometimes the mobile technician applies his technique to the faulty PCB of a cell phone but the Rework Station machine can make a mistake. Other times, the solder components on the PCB can react in the way that is not desirable during mobile maintenance.

How to Use a Heat Gun Rework Station

Today we're going to be talking about the hot air rework station now the hot every workstation is essential for any mobile phone circuit soldering work it should go right along with your soldering iron in the tools you have. As we're talking about hot air rework station in today's blog post. we're going to cover soldered cold joints on Cell Phone PCB with the heat gun workstation, and we're going to show you how to fix mobile phone circuit problems with the rework station. it's also really useful for doing salvaging ICS from other mobile phone motherboards.
SMD Rework Station or Hot Air Blower is needed for soldering and desoldering  components and IC
Best Rework Station for cell phones


Besides a Rework Station machine, you’ll need a few more mobile repairing tools to rework on the surface mount components on a mobile phone printed circuit board.

Tweezers

Tweezers are used to hold micro basic electronic components, jumper wire, and small ICS. remember, the factors to consider when choosing the Tweezer is Quality, Durability, Availability, and Suitability. mostly the tweezer is used to hold very small components that you cannot hold by your fingers. the different types of tweezers use to reach the difficult areas in PCB.
Tweezers hold components, jumper wire, and  ICS. tweezers reach the difficult areas in mobile phone circuit
Anti ESD Tweezers 

tweezer used to place the components positions during soldering when we are working on mobile phones PCB. the tweezer type will depend on the job and personal preference of the mobile technician. soldering flux paste can help reflow solder joints.

If this is the first time that you are doing soldering on the mobile phone circuit read this blog post to know more about professional cell phone repair tools set

smartphone boards Scrap and Used old cell phones scrap
cheap mobile phones circuits
we recommend you to work on a scrap board before working on the expensive PCB! if you are new in mobile phone repairing field and don't know how to use Hot-air Rework Station machines, here is an overview of the Heat Gun Rework Station.

If you are new and dont know, what is a good lab surface to hot-air rework on? click here

Heat Gun Rework Station Overview

Now lets us look at the same function hot-air rework station.
the Best explanation was necessary to come to the topic that is how to use a rework station
step by step guide

The rework station uses a standard plug/outlet (~220 or 110) ac voltage. easy peasy to power on/off Heat Gun. put the button to “ON” to turn the rework station, move the switch to “OFF” to turn the rework station off. always remember! The SMD rework station will not power off immediately after turning the switch to the "OFF" position. It will continue to blow air until the airflow temperature is below 100°C.

Digital Rework Station vs Analog Hot Air Station
Digital Rework Station have LED output shows heat temperature flow
led blink display temperature

In Digital Rework Station The additional LED digital output shows both your heat temperature range as well as your air flow. The display will change as you turn on the Station.

Air Flow

Air Flow range is 1 to 8. You can adjust the air flow by turning the air setting knob. The LED near the Air Flow range output will bink and LED display still for 2 seconds to the current air temperature you need.
the air flow machine under the Hot Air rework Station.
air pump inside the Hot air station 

Heater

Heater Output temperatures range is 1° ~ 8° Celsius. You can adjust the rework station heater temperature by turning the Heater setting knob. The LED near the Heater setting first still then it will bink and The metal in the handle on heat gun goes red when the desired temperature is reached.
The metal under the handle on Hot Air Station goes heat up
Heater on handle

Nozzle


The Rework Station comes with 3x changeable nozzles. The smaller nozzle is good for focusing the SMD gun on smaller components. The bigger nozzle is great if you are trying to change the mobile phone charging jack on the board.
changeable nozzles are best for focusing on the smaller components on the mobile phone circuits
bigger nozzle

Handle

inside rework station handles there is a heating element. the heat element fire up when you turn the heat gun on. after a few minutes the heating element gets red then you can use rework station.
the rework station handle used to give heat on a specific area on the cell phone circuit
Hot Air Station Handle
if you learn to solder with rework stations can be very handy for you to change SMD components and ICs on the mobile phone PCB on any fault. it can also good for changing charging jack, LCD jack, memory card jack. As mentioned above, hot air station is a crucial tool when it comes to reworking a cell phones board.
handy rework stations change charging jack, LCD jack, memory card jack and ICs on the smartphone PCB on any fault
solder work on mobile phones circuit

If you are new and dont know what is the safe temperature for desoldering SMD components with hot-air rework gun click here 

Rework

The term rework means is you are fixing, resoldering and repairing present components on a PCB, and it is a common word used in the electronics and electrical world.

If you are new and dont know how to rework on SMD(surface mount desoldering) ICs watch these videos

here is some common rework on the list you can do with hot air station on a mobile or smartphone tablet PCB:

Resoldering Polarized Components
Soldering Polarized or non-polar capacitors. to test component in your smartphone circuit
Apply flux and heat
Solder or Resold Polarized Components like polar or non-polar capacitors. to check faulty capacitors in your smartphone circuit before resoldering them you have to check it. if you dont know how to check these capacitors before removing them from the PCBs read this blog post How to Check Polar Capacitor in Smartphone Circuit
Resold or solder micro capacitors to check fault on your smartphone circuit before turning it on.
Resoldering Capacitors
To know what is the safe temperature for desoldering components and IC with the hot air station in mobile repairing click here

Soldering Cell Phone Tombstone Parts

Resold or solder Tombstone Parts on mobile phone PCB, like the resistance, diodes. to resembling the lift up parts by any cause we usually use rework station to solder them.
resembling the lift up parts like the diodes, resistance on the pcb
Fixing Tombstone Parts

Resoldering Phone Charging Ports


The connectors like charging jack, charging port, and the USB port that is reflowed only on one side.
Resoldering Charging connectors and USB port one side on the smartphone PCB
Phone Charging Port
Soldered Cold Joints on Cell Phone PCB
Solder Cold Joints on the components include ICs joints connection that is not being made before
component and IC’s legs
Cold Joints similar to a tombstone. These include ICs making joints harder to see the connection that is not being made before.
Soldered Cold Joints on Cell Phone PCB include ICs making joints harder
example pictures

Removing Defective Integrated Circuit IC form the PCB

Sometimes, during the micro-components and integrated circuit IC manufacturing process, errors can arise and go unnoticed by mobile companies and get noticed by the user after buying the device. Heat Gun Rework Station is best for replacing these Defective parts and ICs.
Removing Defective micro components by the user after buying the device. Heat Gun Rework Station is best for removing these Defective parts and ICs
unsolder the defective parts

Soldering Missing Parts


The smaller the ICs, Components, the easier for these to disappear. This can happen when the device gets fallen resulting in a spot where something should be but isn’t. you can identify these parts by the looking at particular cell phone diagram. if you have these missing parts in your shop or can buy new once you can easily fix them with rework station.

Solder Jumpers on PCB

Sometimes you work on the smartphone circuit and you found out! another mobile technician work on it before you do. the technician used too much solder or solder paste, the result you see on the PCB, then you can fix this PCB by Unintentional Solder Jumpers on one or more of IC’s legs and components with a hot-air station. and you can use the hot-air to remove paste from the joints.

To know the review on top 10 rework station click here

How to Use Heat Gun Rework Station on Cell Phone PCB

Safety first: Do not use the heat gun or Rework station on surfaces like glass table, study table which you don't want to be ruined. we recommend you to use a piece of scrap wood or PCB Holder to work with the hot-air station on the mobile phone and Laptop circuits

Step One: Attach the Rework Station Nozzle

Choose your nozzles first to do the soldering job. now attach the nozzle to the top of the rework station handle as you can see in the picture.

Choose the best hot air Rework Station nozzle to do the soldering work. the picture show you process to attach the nozzle on the top of the rework station handle
nozzle on a handle 
And tighten the nozzle screw using a screwdriver to hold it in place.
tighten the screw on the nozzle to hold it on the top of the handle
now screw the handle

remember, the heating element and blower of the Rework station will remain off until you press the power switch to ON.
press the power switch to ON the heating element and blower of the Rework station
switch on station

Step Two: Press the Power Button

Now press the power button to start the heating element on the handle of rework station, then wait for hot air to come. Wait for the hot-air station to warm up before using it on the circuits. the red LED next to the “AIR TEMP” will pulse, then you get very hot air. Now aim the nozzle where you want to heat on the Cell phone PCB

Note: If you are using hot air station the first time, it is possible you see puffs of white smoke coming out from the nozzle. will don't get scared those are just solder clouds and that is normal. They will go away after a few seconds.

Step Three: Adjust Heat and Air Temperature form the knobs

Air is for airflow and Heater is for temperature. Adjust them us you need them.
Adjust airflow and Heater with the digital rework station knob
Adjust Temperature
Note: Don't Set the heating temperature higher than the melting point of the solder, and don't set air too much to blow your circuit components away when you're trying to fix them on the circuit. we suggest you set the air and heat temperature knobs to the middle and then test on a scrap PCB small components.

we suggest you get a train in cell phone repairing with the hot air station. to get the class of mobile phone repairing with the hot air station join

Step four: Rework or Resoldering on the Cell Phone PCB

When you’ve got your settings honed in, always aim the nozzle carefully at mobile phone PCB when you are working on it. move the nozzle back and forth until the solder begins to flow the solder should appear shiny. then carefully reposition/remove the component you want to rework with the help of the tweezer by nudging or grabbing the component. Keep in mind that the hot-air never get a break during the whole process. make sure to keep the heat gun handle moving to prevent any damage to the component or the ICs from burning. Aiming the heat gun at the same point can coss damage the ICs after a certain period of time. every component in the mobile phone circuit gets unsolder in a Certain period of time. the training instructor knows it well and he can teach you. Some components in the PCB are Certain heat sensitive. some cell phone basic electronics and ICs have a number of values written on it. which can be melt while giving more heat form rework station. Be sure to set the right heat on those components! If you see warping or smoke coming from Phone PCB during resoldering, remove heat gun handle out of range of working area on your PCB and turn your heat temperature down. when you are done, push the power switch to OFF to allow the rework station to cool down when you finish your resoldering work. The self-cooling system automatically switches on when you push the power button off. the heater metal element on the handle switch off and the air flow is coming out for a few minutes until the element gets cool.

Step five: Clean the PCB After Doing any Work with the Heat Gun Rework Station

Wash your board with CTC (Carbon tetrachloride) when you're finished resoldering work, you can also do this work on water damage PCBs, to remove any water-soluble left on the PCB which can cause corrosion over time.

Hot Air Rework Station Recommendation

in this Blog Post, I am also sharing the information with you about the best hot air rework station supplies rate because the reader also went to know where to buy their hot air rework station.
the website is listed below
Amazon
Alibaba
eBay
Flipkart

the reason I bring this up because the people reading this post went to know the price before buying the Heat Gun Rework Station.

Now, in the end, some important FAQs and answers

Common Problem and Their Solution During Work with the Heat Gun Rework Station

Question: Low Airflow When I Turned Up “Air” Dial to Full

Answer: If you are getting low air flow problem on your rework station, make sure that you have the nozzle securely attached to the end of the handle. if you need more air at the specific area on the cell phone PCB use the nozzle, you will get more air flowing through the hot-air rework station.

No heating element fire up When I switch on the Rework Station or H-E Error

“H-E” means there is a heating error. It might be that there is something with the heating element failing on the handle or not connected properly with the internal wires on the rework station. First, open the rework station handle with the help of a screwdriver and reconnect the wires connections to see if the heating element needs to be re-seated. if the problem exists we recommend you to change the heating element. the rework station might be able to be revived by removing and re-attaching the heater

If I miss something about rework station heat gun and you have questions, please feel free to drop them in the comments box below.
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