JBL SB 150 Service Manual ▷ View online
3-3
2. Installation
1. Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA
so you can install a replacement flat pack-IC more
easily.
so you can install a replacement flat pack-IC more
easily.
2. The “ ” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the 1
on the PCB when positioning for installation. Then
presolder the four corners of the flat pack-IC. (See
Fig. S-1-8.)
on the PCB when positioning for installation. Then
presolder the four corners of the flat pack-IC. (See
Fig. S-1-8.)
3. Solder all pins of the flat pack-IC. Be sure that
none of the pins have solder bridges.
Instructions for Handling Semi-
Special Information BGA IC & Flat Pack-IC
conductors
Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by
electrostatic charge during unpacking or repair work.
occur due to a potential difference caused by
electrostatic charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1 MΩ) that is
properly grounded to remove any static electricity that
may be charged on the body.
properly grounded to remove any static electricity that
may be charged on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper plate
with proper grounding (1 MΩ) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on
clothing will not escape through the body grounding
band, be careful to avoid contacting semi-conductors
with your clothing.
with proper grounding (1 MΩ) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on
clothing will not escape through the body grounding
band, be careful to avoid contacting semi-conductors
with your clothing.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
is indicated by a " " mark.
Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
<Incorrect>
CBA
Grounding Band
Conductive Sheet or
Copper Plate
Copper Plate
1MΩ
1MΩ
<Correct>
CBA
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ZUURYOTYKXZKJOTZUZNKMGVZUVXOKJOXUTMXORR
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H:GQK
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Disassemble
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9(
Disassembly procedure
G:UURY
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Screw driver or electric screw driver
=NOZKUOR（
n-hexane or isopropanol）
4-1
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H
Disassemble
ZNK]OXKRKYYHUGXJ
H
Disassemble
ZNKY[H]UULKXHUGXJYGTJYVKGQKX
4-2
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ZNKXOMNZYOJKIU\KXIUTTKIZZNKIGHRKGTJV[YNHGIQZNK6<)Z[HKZNKTGYYKSHRKZNKYVKGQKXGTJZOMNZKTZNKYIXK]Y
ZNKXOMNZYOJKIU\KXIUTTKIZZNKIGHRKGTJV[YNHGIQZNK6<)Z[HKZNKTGYYKSHRKZNKYVKGQKXGTJZOMNZKTZNKYIXK]Y
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YIXK]Y
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9(
Reassembly procedure
G:UURY
Screw driver or electric screw driver
(RGIQ MR[K
H
Reassemble
ZNKXOMNZYOJKIU\KX
H
Reassemble
ZNKHGIQVGTKR
Display cable
wireless
module cable
Speaker cable
H
Test the basic funcon before assemble the iron grill
5-1
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