Service manual

CONFIDENTIAL – DO NOT COPY
Page10-14
File No. SG-0174
10
PDP DISPLAY NOTHING(S-VIDEO 1 on PIP mode without screen)
Check C318,R291,R292
Is there signal?
No
Is picture on screen?
No
BLOCK 1
Check Q30’s emitter.
Is there signal?
No
Check Q30’s Base.
Is there signal?
Check collector
voltage(+5V).
No
Q30 fail
Check:
1.C319 (signal AC coupled)
2.R297
3.R299(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Q10 fail
No
Check input source
No
Is picture color ok?
Check C326,R306,R307
Is there signal?
No
No
Check Q31’s emitter.
Is there signal?
No
Check Q31’s Base.
Is there signal?
Check collector
voltage(+5V).
No
Q31 fail
Check:
1.C327 (signal AC coupled)
2.R296
3.R298(75ohm impedance)
Is there signal?
Yes
Yes
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Q10 fail
No
Check input source
No