31
230WP7 LCD
Repair Tips
0. W
ar
n
i
ng
All IC
s a
nd m
a
ny oth
er se
m
i
-conducto
rs are s
u
s
c
ep
t
i
bl
e
to
e
l
e
ct
r
o
s
t
a
t
i
c d
is
ch
ar
g
es
(ESD). C
are
l
ess
h
a
ndl
i
ng du
ri
ng
repair
c
a
n
re
duc
e
l
i
f
e
d
ras
t
i
c
a
lly. Wh
e
n
repairi
ng, m
a
k
e s
u
re
th
a
t you
are
conn
e
ct
e
d w
i
th th
e sa
m
e p
ot
e
nt
ia
l
as
th
e
m
ass
of th
e
un
i
t v
ia a
w
ris
t w
rap
w
i
th
resis
t
a
nc
e
. K
eep
com
p
on
e
nt
s
a
nd tool
s a
l
s
o
a
t th
e sa
m
e p
ot
e
nt
ia
l !
1. S
er
v
i
c
i
ng of SMD
s
(Su
r
f
a
c
e
Mount
e
d D
e
v
i
c
es
)
1.1 G
e
n
era
l c
a
ut
i
on
s
on h
a
ndl
i
ng
a
nd
s
to
ra
g
e
- Ox
i
d
a
t
i
on on th
e
t
er
m
i
n
a
l
s
of SMD
s res
ult
s i
n
p
oo
r s
old
eri
ng.
Do not h
a
ndl
e
- Avo
i
d u
si
ng
s
s
uch
as p
l
a
c
es
h
i
gh t
e
m
pera
tu
c
apa
c
i
t
a
nc
e
o
r resis
a
ff
e
ct
e
d by th
is
.
-
R
ough h
a
ndl
i
c
a
u
se
d
a
m
a
g
e
bo
ar
d
s
. C
ir
cu
i
t bo
b
e
nt o
r
fl
e
x
e
d. D
cont
ra
ct
a
t d
i
ff
com
p
on
e
nt
s a
du
e
to th
e s
t
th
is
m
a
y c
a
u
se
S
i
m
i
l
ar
ly, do not
1.2
Re
mov
a
l of SMD
- H
ea
t th
e s
old
ch
ip
. By m
ea
n
s
s
m
a
ll com
p
on
e
T
h
e
y c
a
n
a
l
s
o b
1A)
Wh
i
l
e
hold
i
ng th
e
SMD w
i
th
a pair
of tw
ee
z
ers
, t
a
k
e i
t off g
e
ntly u
si
ng th
e
s
old
eri
ng
ir
on'
s
h
ea
t
app
l
ie
d to
ea
ch t
er
m
i
n
a
l (
see
F
i
g. 1 B).
-
Re
mov
e
th
e e
xc
ess s
old
er
on th
e s
old
er
l
a
nd
s
by m
ea
n
s
of
l
i
tz w
ire
o
r a s
old
er s
uck
er
(
see
F
i
g. 1C).
1.3 C
a
ut
i
on on
re
mov
a
l
- Wh
e
n h
a
ndl
i
ng th
e s
old
eri
ng.
ir
on. u
se s
u
i
t
a
bl
e press
u
re a
nd b
e
c
are
ful.
- Wh
e
n
re
mov
i
ng th
e
ch
ip
, do not u
se
undu
e
fo
r
c
e
w
i
th th
e pair
of tw
ee
z
ers
.
-
T
h
e s
old
eri
ng
ir
on to b
e
u
se
d (
appr
ox. 30 W)
s
hould
pre
f
era
bly b
e e
qu
ippe
d w
i
th
a
th
er
m
a
l cont
r
ol (
s
old
eri
ng
t
e
m
pera
tu
re
: 225 to 250 C).
-
T
h
e
ch
ip
, onc
e re
mov
e
d, mu
s
t n
e
v
er
b
e re
u
se
d.
1.4 Att
a
chm
e
nt of SMD
s
- Loc
a
t
e
th
e
SMD on th
e s
old
er
l
a
nd
s
by m
ea
n
s
of tw
ee
z
ers
a
nd
s
old
er
th
e
com
p
on
e
nt on on
e si
d
e
. En
s
u
re
th
a
t th
e
com
p
on
e
nt
is p
o
si
t
i
on
e
d co
rre
ctly on th
e s
old
er
l
a
nd
s
(
see
F
i
g.2A).
- N
e
xt com
p
l
e
t
e
th
e s
old
eri
ng of th
e
t
er
m
i
n
a
l
s
of th
e
com
p
on
e
nt (
see
F
i
q. 2B).
e
m
hould b
e
n to
a
vo
i
d
es
.
e
d bo
ar
d wh
e
n
ox. 30 W )
s
hould
ol (
s
old
eri
ng
er
l
a
nd.
hould not b
e
a
lly
a
t
r
oom
-
T
h
e
qu
a
nt
i
ty of
s
old
er
mu
s
t b
e pr
o
p
o
r
t
i
on
a
l to th
e si
z
e
of th
e
s
old
er
l
a
nd. If th
e
qu
a
nt
i
ty
is
too g
rea
t, th
e
SMD m
i
ght
c
ra
ck o
r
th
e s
old
er
l
a
nd
s
m
i
ght b
e
to
r
n loo
se
f
r
om th
e
pri
nt
e
d bo
ar
d (
see
F
i
g. 3).
F
i
g.3 Ex
a
m
p
l
es
Ri
ght
Содержание 230WP7
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