Vizio P50HDM - 50" Plasma Panel Service Manual page 76

PDP DISPLAY NOTHING(S-VIDEO 2 on PIP mode without screen)
BLOCK 1
Is picture on screen?
Is picture color ok?
CONFIDENTIAL – DO NOT COPY
No No
Check C331,R313,R320
Is there signal?
Yes
No
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
Check:
1.C335 (signal AC coupled)
2.R300
3.R302(75ohm impedance)
Is there signal?
No No
Check C334,R317,R318
Is there signal?
Yes
No
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
Check:
1.C333 (signal AC coupled)
2.R301
3.R303(75ohm impedance)
Is there signal?
Check Q33's Base.
No
Check Q33's emitter. Is there signal?
Is there signal? Check collector
voltage(+5V).
U10 fail
No
Check input source
Check Q32's Base.
No
Check Q32's emitter. Is there signal?
Is there signal? Check collector
voltage(+5V).
U10 fail
No
Check input source
No
Q33 fail
No
Q32 fail
12
Page10-16
File No. SG-0174