Work on SMD circuit board

Yaakov

Joined Jan 27, 2019
3,188
Your question is so ambiguous as to be unanswerable.

Are you asking about tools? Techniques?

Why Android in particular.

Could you explain what you are trying to do?
 

Thread Starter

basudeo

Joined Oct 24, 2020
5
How to check and work with on SMD circuit board sometimes it is very difficult to sold and pull the nano components?
 

AlbertHall

Joined Jun 4, 2014
11,317
I got a cheap hot air machine and it makes removing smd components very much easier and with less risk of damage to the board and the surrounding components. I still use a soldering iron to place components on the board.
 

Thread Starter

basudeo

Joined Oct 24, 2020
5
I got a cheap hot air machine and it makes removing smd components very much easier and with less risk of damage to the board and the surrounding components. I still use a soldering iron to place components on the board.
How to protect other components from hot gun heat while working on one component?
 

AlbertHall

Joined Jun 4, 2014
11,317
The gun comes with assorted nozzles so you can choose a suitable size. You heat the part you want to remove and as soon as the solder melts you can remove the air and the component (tweezers) so the surroundings get minimum heat.
 

nsaspook

Joined Aug 27, 2009
8,394
But in this option it is very prone to melt plastic cover and nearby components, as the temp of blower / hot gun around 350 or 500 deg c.
The tape or thin foil taped to the PCB will act as a heat barrier to reduce the transmission of heat to what's below.
With a narrow tip, low air flow, proper heat range and practice you can easily remove components without damaging taped components. If the near components are really sensitive then hot tweezers are necessary.
 
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Thread Starter

basudeo

Joined Oct 24, 2020
5
What will require the ambient temperature and air of blower /Hot gun for pulling / fixing out smd components?
 

nsaspook

Joined Aug 27, 2009
8,394
Chip upgrade SMD rework. I designed the board to give plenty of space around the controller for easier soldering and possible controller upgrades.
New chip installed.
PXL_20210425_202921374 (1).jpg
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Old chip removal.

This was all done with a
 
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