Read LG 42LG60 (CHASSIS:LA84B) Service Manual online
- 23 -
C
2008
Check input connect JK600,
JK601,JK708
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
Check DDC commu
nication lines
(IC601, IC602,
IC603, IC701)
JK60
0,JK6
01,
JK70
8 ma
y
h
a
v
e
p
roblem. R
e
place th
is Jack.
Check the output of
PI3HDMI341
A
T
R(IC600)
_HDMI1,2,3
or
TMDS1
4
1
H
A
R(
IC
7
0
3)
_HDMI4
.
.
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
A
ft
e
r checking the Po
w
e
r
of this chip, y
o
u should
decide to
replace this or not.
Check HD
CP co
mmunicatio
n lin
es(IC102)
A
ft
e
r checking the Po
w
e
r
of this chip, y
ou should
decide to replace this or not.
YES
YES
YES
NO
NO
NO
NO
This board ha
s big
problem
because Main chip(BCM3553) ha
v
e
some troubles.
A
ft
e
r ch
ec
kin
g th
orou
ghly
all p
a
th
once ag
ain
, You
sho
uld d
ecid
e
to rep
lace BCM
3553 o
r n
o
t.
Check all p
o
w
e
r d
o
main
o
f
FRC-945
9M (IC100
0)
(3.3V, 1.3V_C
ORE,1.3V_PL
L,3.3V,1.8V,2.5V)
& cr
y
s
tal output (X1000 / 20.25MHz)&FR
C_RESET
Measure Po
w
e
r &
w
a
v
e
for
m
at L1008,L1007,L1002,L1013,
L
1014,L
101
5~
L
1018&
C10
06
&R10
29
becau
se it
s more easy
to
check.
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
YES
This board ha
s big
problem
because FRC chip(FRC-9459M) hav
e
some troubles.
A
ft
e
r checking thoroughly
all path
once
again, You should decide
to replace
FRC-945
9M.
A
lthough y
ou
replace it, y
ou cannot see normal display
, decide to replace
M
a
in
c
h
ip
(B
C
M
3553
)
YES
HDMI
Click on the first or last page to see other 42LG60 (CHASSIS:LA84B) service manuals if exist.