Changhong Electric PT4206, Service Manual, Page: 40 / 48

40
three The red led light but turn to other color after power on and black display
change swi t ch
f i nd i f t her e i s
i con on t he
scr een
f ol l ow no
pi ct ur e t o check
Yes
check mai nboar d
J15
Ј » check t he
l i ne
No
Yes mend
check LVDS
si gnal
No
1 Ў ў LVDS ON i s
hi gn or not
2
Ў ў check PW 113
sync Ў ў pi xel
cl ock Ў ў RGB dat a
si nal
No
checkDS90c383
power suppl y
Yes
check PW 113
out put por t Ј »
change PW 113
No
check power
suppl y
No
check DS90C383 Ј ¬
change
Yes
check PW 113
sync Ў ў pi xel
cl ock Ў ў RGB dat a
si nal
Yes
check cr yst al
f r equent
Ј » check
PW 113 Ј » change
Yes