Read LG 42LG60 (CHASSIS:LA84B) Service Manual online
- 28 -
C
2008
Check th
e o
u
tput (Pin
A
K
25
,A
L25,
A
J
25) o
f BCM355
3(IC
100).
Measure
w
a
v
e
form at R2635
,R2636,R
263
7 because it
s more easy
to
check.
Can y
ou see t
h
e n
o
rmal sign
al?
Check the input (Pin 17,18,19) of NTP3000((IC501).
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
YES
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
A
ft
e
r checking audio signal line, y
o
u sh
ould decide
to
replace item or not.
YES
Check the output (Pin 30,31,36,37,47,
48,53,54) of NTP3000((IC501).
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
NO
YES
A
ft
e
r checking the Po
w
e
r &
I2C & Reset of this ch
ip, y
ou should
decide
to replace this or n
o
Check the spe
aker output
w
a
fer P501.
Can y
ou see t
h
e n
o
rmal
w
a
v
e
form?
NO
YES
A
ft
e
r checking audio signal line, y
o
u sh
ould decide
to
replace item or not.
Check the connector & Speaker
* If condition of starting
sound
is
abnomal
, y
ou
hav
e to
chec
k IC1000(TP
A3005).
Speaker
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