In PCBA
processing, after checking the soldering quality of electronic components, it
is necessary to disassemble and re-solder the poorly soldered electronic
components. If you want to remove the wrongly soldered electronic components
without damaging other components and the board, you must master PCBA soldering
and de-soldering skills. Next, China PCBA factory SYS Tech will introduce the
desoldering principles and working points of PCBA processing.
1. Basic
principles of desoldering:
Be sure to figure
out the characteristics of the original solder joints before desoldering, and
don't do it casually.
(1) Do not damage the components, wires and
surrounding components around the components to be removed;
(2) Do not damage the pads and printed wires
on the PCB during desoldering;
(3) For electronic components that have been
judged to be damaged, the pins can be cut first and then removed, which can
reduce damage;
(4) Try to avoid moving the positions of other
components, and if necessary, restoration must be done well.
2. Knowhow of
desoldering:
(1) Strictly control the heating temperature
and time to avoid high temperature damage to PCB or other components.
Generally, the time and temperature of desoldering is longer than that of
soldering.
(2) Do not use excessive force when
desoldering. The package strength of components under high temperature decreases,
and excessive pulling, shaking, and twisting will damage components and pads.
(3) Absorb the solder on the desoldering points.
You can use the solder suction tool to suck the solder and unplug the
components directly, reducing the desoldering time and the possibility of
damaging the PCB.
Above are the desoldering
principles and the knowhow in PCBA processing. hope it can provide you with
some help.
