SB 150 (serv.man2) - JBL Audio Service Manual (repair manual). Page 6

3. The flat pack-IC on the CBA 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.

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. S-1-3)

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. S-1-4)

3. Bottom of the flat pack-IC is fixed with glue to the

CBA; 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. S-1-6)

4. Release the flat pack-IC from the CBA using

tweezers. (Fig. S-1-6)

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. S-1-3)

2. Affix the wire to a workbench or solid mounting

point, as shown in Fig. S-1-5.

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 CBA
contact pads as shown in Fig. S-1-5.

4. Bottom of the flat pack-IC is fixed with glue to the

CBA; 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. S-1-6)

5. Release the flat pack-IC from the CBA using

tweezers. (Fig. S-1-6)

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 CBA, handle it gently 
because it may be damaged if force is applied.

Hot-air
Flat Pack-IC
Desoldering
Machine

CBA

Flat Pack-IC

Tweezers

Masking
Tape

Fig. S-1-2

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

Fine Tip
Soldering Iron

Sharp
Pin

Fig. S-1-4

To Solid 
Mounting Point

Soldering Iron

Iron Wire

or

Hot Air Blower

Fig. S-1-5

Fine Tip
Soldering Iron

CBA

Flat Pack-IC

Tweezers

Fig. S-1-6

3-2

Special Information of BGA IC & Flat Pack- IC