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TV、AV、S-VDEO、
YCbCr all no
picture
check PW1235
repair abnormality
power 、clock
check VPC3230
check and change
Yes
output
PW1235
No
check VPC3230
power 、clock钟
periphery
circuit；change
VPC3230
if there is one
state to display
when switch the
source
only TV、AV、
only TV、AV is
S-VIDE Ono
NTSC no picture
picture
check AV board
check TEA6425D14
connector
pin video outout
joint well
check uPD64083
check TEA6425D
I/O filter and
I/O
amplifer circuit
input well,but output bad
check uPD64083
check TEA6425
reset、clock、
power、bus；
power；
change TEA6425
changeuPD64083
47
checka
check TEA6425D1
nd
pin video signal
Yes
No
change
TEA642
5D
Yes
check TDQ-6F7
power、bus and
video followwing
outout circuit
check and change
only TV no
picture
input
TDQ-6F7
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