Vizio P50HDTV10A, Руководство по обслуживанию

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CONFIDENTIAL – DO NOT COPY Page 9- 14
File No. SG-0219
9
PDP DISPLAY NOTHING(S-VIDEO 1 without screen)
Check C320,R293,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
v5V).
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?
Q13 fail
No
Check input source
No
Is picture color ok?
Check C328,R308,R307
Is there signal?
No No
Check Q31’s emitter.
Is there signal?
No
Check Q31’s Base.
Is there signal?
Check collector
v5V).
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?
Q13 fail
No
Check input source
No
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