Sharp XV-ZW99U - TROUBLE SHOOTING TABLE; Checking the PWB performance

(
xv-zw99u
TROUBLE SHOOTING TABLE
Checking the PWB performance
1
1
I
I
I
RGB input trouble
J
’ ”
Feed test pattern signal from PC
j : Go to “Checking video system”
PC and projector?
Use specified cable
Is supply voltage as spcified?
Power circuit in trouble
Does image appear?
\1
Yes
Check control circuit i
: Go to “Checking the component !
system”
-’
:’ “‘.’
: Go to “Checking the remote control
i
circuit”
Does R picture appear?
I Yes
NO
No +’ Go to “Checking the R signal line of
signal processing PWB”
0..
( Go to “Checking the G signal line
output PWB”
v
1 No
Does G picture appear?
Are D/A 07 No ) Go to “Checking the G Signal line of i
specified?
signal processing PWB”
:
:
Yes
! .“‘.“’
: Go to “Checking the G signal line
output PWB”
Yes
Go to “Checking the B signal line of
signal processing PWB”
‘Go to “Checking the B signal line output:
29