How To Remove / Install Flat Pack-Ic; With Hot-Air Flat Pack-Ic Desoldering Machine; With Soldering Iron - JVC LT-32A200 Service Manual

2.2.3 HOW TO REMOVE / INSTALL FLAT PACK-IC

2.2.3.1 REMOVAL

WITH HOT-AIR FLAT PACK-IC DESOLDERING MACHINE:

(1) Prepare the hot-air flat pack-IC desoldering machine,
then apply hot air to the Flat Pack-IC (about 5 to 6
seconds). (Fig.2-1)
(2) Remove the flat pack-IC with tweezers while applying
the hot air.
(3) 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)
(4) Release the flat pack-IC from the PWB using tweezers.
(Fig.2-6)
CAUTION:
(1) The Flat Pack-IC shape may differ by models. Use an
appropriate hot-air flat pack-IC desoldering machine,
whose shape matches that of the Flat Pack-IC.
(2) Do not supply hot air to the chip parts around the flat
pack-IC for over 6 seconds because damage to the
chip parts may occur. Put masking tape around the flat
pack-IC to protect other parts from damage. (Fig.2-2)
(3) The flat pack-IC on the PWB is affixed with glue, so be
careful not to break or damage the foil of each pin or
the solder lands under the IC when removing it.
CBA
Masking
Tape
Tweezers
Fig.2-1
Hot-air
Flat Pack-IC
Desoldering
Machine
Flat Pack-IC
Fig.2-2

WITH SOLDERING IRON:

(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)
Flat Pack-IC
(2) Lift each lead of the flat pack-IC upward one by one,
using a sharp pin or wire to which solder will not adhere
(iron wire). When heating the pins, use a fine tip
soldering iron or a hot air desoldering machine. (Fig.2-4)
Fine Tip
Soldering Iron
(3) 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)
(4) Release the flat pack-IC from the PWB using tweezers.
(Fig.2-6)
Desoldering Braid
Soldering Iron
Fig.2-3
Sharp
Pin
Fig.2-4
(No.YA712<Rev.002>)1-5