1-6 (No.YA712<Rev.002>)
WITH IRON WIRE:
(1) Using desoldering braid, remove the solder from all pins
of the flat pack-IC. When you use solder flux which is
applied to all pins of the flat pack-IC, you can remove it
easily. (Fig.2-3)
(2) Affix the wire to a workbench or solid mounting point, as
shown in Fig.2-5.
(3) While heating the pins using a fine tip soldering iron or
hot air blower, pull up the wire as the solder melts so as
to lift the IC leads from the PWB contact pads as shown
in Fig.2-5.
(4) Bottom of the flat pack-IC is fixed with glue to the PWB;
when removing entire flat pack-IC, first apply soldering
iron to center of the flat pack-IC and heat up. Then
remove (glue will be melted). (Fig.2-6)
(5) Release the flat pack-IC from the PWB using tweezers.
(Fig.2-6)
NOTE:
When using a soldering iron, care must be taken to ensure
that the flat pack-IC is not being held by glue. When the flat
pack-IC is removed from the PWB, handle it gently because
it may be damaged if force is applied.
Fig.2-5
Fig.2-6
2.2.3.2
INSTALLATION
(1) Using desoldering braid, remove the solder from the foil of
each pin of the flat pack-IC on the PWB so you can install
a replacement flat pack-IC more easily.
(2) The
z
mark on the flat pack-IC indicates pin 1. (See Fig.2-
7.) Be sure this mark matches the pin 1 on the PCB when
positioning for installation. Then presolder the four corners
of the flat pack-IC. (See Fig.2-8.)
(3) Solder all pins of the flat pack-IC. Be sure that none of the
pins have solder bridges.
Fig.2-7
Fig.2-8
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fine Tip
Soldering Iron
CBA
Flat Pack-IC
Tweezers
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Presolder
CBA
Flat Pack-IC
