MANI
BOARD
FAULT
JUDGMENT
10
Function
Trouble
(
AV
、
S_VEDIO
、
SCART
、
HDMI
、
VGA
)
AV
no
picture
Check
if
the
CN29
have
CVBS
signal?
N
Y
Check
peripheral
video
equipment
N
Y
Check
if
the
pin26
of U12 has signal?
f
?
N
Y
Check
the
circuit
between
th
N29 and U12
1.Check
the
power
supply
of
the
U12
2 U12 is damaged
the
C
2.
3. Updata
the
software
AV no sound
Check if the CN29 has
audio signal?
N
Y
Check if the pin33
、
34 of
th U12 has signal?
N
Check peripheral
audio equipment
Y
e
Y
N
Refer to“ 5 ”
1.Check the power
supply of the U12
2 U12 is damaged
.
3. Updata the software
7
.