N
Y
Dose U7
work
normal
and
it’s
network
Y
N
Check I2C data
network’s
connection
to
U13(MSD306P
T) #Y6,W6 pin
N
Y
Does U14 have TS signal output?
N
Check
U13(MSD3
06PT)
signal
network
concerned
Y
Change
Tuner
Does U13
have TS
signal output
Check
external
circuit
N
Y
Picture 7 Function Unit
(DTV broke down)
TV not searching/no image
E
x
t
e
r
n
a
l
R
F
i
n
p
u
t
s
i
g
n
a
l
W
h
e
t
h
e
r
o
r
n
o
t
n
o
r
m
a
l
Check
external
RF
equipment
Check tuner VCC whether has 5V
Check Tuner’s I
2
C data
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