after the solder joints are teamed

we'll move the plastic connector from another C

model mutter board for this one

or by a new plastic connector from the market

and solder it back to the mutter board

before weld it back on the motherboard

we

first need to apply a layer of flux to the motherboard

when applying the solder

blow the motherboard a little with an air gun

make it a little warmer

in this way

the floss can be applied more evenly and thinner

if we don't warm it if with gloom temperature

after the flux is applied it may become a lump

which is not easy to spread

after the flux is applied

we put a pre

disassembled plastic connector on the motor board

positioning

our alignment

we just need to see if

this horizontal row of golden pins

and the silver white

solder joints at the bottom are aligned

just align it then take a closer look

are there any white dots under the first

row horizontally

are there any dots under the bottom row horizontally

likely to have this effect

some newbies may have this effect by accident

if so let's check the middle area

each pin is alliant

but there is an extra pin on the bottom

there is one more setter joint at this position

this is the common problem

it's called mall position

although the paints in the middle area are aligned

but look at the top of this

a lot of solder

the bottom side is quite different from the top

this is the mall position

we must completely match the solder joints

like when you loosen the tweezers

it is possible that the tweezered legs

will drive the connectors to move slightly

it's because there is a

little flux on the surface of the connector

it will stick to the tweezers

blow it with the hot air gun

then remove the tweezers and it won't move

the conductor