LG 32LC7D (CHASSIS:LA73E) Service Manual ▷ View online
- 41 -
- HDMI doesn't display
Check input c
onnect P7007.
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
Check DDC commu
nication lines(IC7013
Pin5,6)
Check th
e in
pu
t o
f MST
3361
(IC7004)
This signal is
TMDS.
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
YE
S
YE
S
NO
P7007 may
hav
e
problem. Replace this Jack.
Check the output of
MST3361(IC7004 ).
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
YE
S
Check th
e in
pu
t an
d
outpu
t of
BCM3550(IC4006). Especially
y
ou should
ch
eck
The
H,V sy
nc and clock.
Can y
o
u see t
h
e n
o
rmal
w
a
v
e
form?
YE
S
NO
NO
A
ft
e
r ch
ec
kin
g th
e trace o
f
TMDS lin
es a
n
d po
w
e
r o
f
MST3361, y
ou should decide to replace MST3361 or
not.
NO
YE
X
This board ha
s big
problem
because Main
chip(BCM3
550)
hav
e some trouble
s.
A
fter checking thorough
ly
all path
once
again,
You should decide to replace BCM3550 o
r not.
A
ft
e
r checking the Po
w
e
r
of this chip, y
o
u
should decide
to replace this or not.
A
ft
e
r ch
ec
kin
g th
e Po
w
e
r of MST
3361
y
ou
should decide
to replace MST3361 or not.
YE
S
Check HD
CP co
mmunicatio
n lin
es(IC7005
Pin5,6)
NO
A
ft
e
r checking the Po
w
e
r
of this chip, y
ou
should decide
to replace this or not.
- 42 -
EXPLODED VIEW
430
600
301
300
200
590
120
530
201
580
520
400
521
203
204
205
202
206
591
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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