Service manual

CONFIDENTIAL – DO NOT COPY
Page10-15
File No. SG-0174
11
PDP DISPLAY NOTHING(S-VIDEO 2 without screen)
Check C332,R316,R320
Is there signal?
No
Is picture on screen?
No
BLOCK 1
Check Q33’s emitter.
Is there signal?
No
Check Q33’s Base.
Is there signal?
Check collector
voltage(+5V).
No
Q33 fail
Check:
1.C335 (signal AC coupled)
2.R300
3.R302(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
U13 fail
No
Check input source
No
Is picture color ok?
Check C336,R319,R318
Is there signal?
No
No
Check Q32’s emitter.
Is there signal?
No
Check Q32’s Base.
Is there signal?
Check collector
voltage(+5V).
No
Q32 fail
Check:
1.C333 (signal AC coupled)
2.R301
3.R303(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
U13 fail
No
Check input source
No