Vizio VP50HDTV10A Service Manual page 26

PDP DISPLAY NOTHING(Analog HD1 without Pb signal)
BLOCK 1
Is picture on screen?
PDP DISPLAY NOTHING(Analog HD1 without Pr signal)
BLOCK 1
Is picture on screen?
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Y signal)
BLOCK 1
Is picture on screen?
CONFIDENTIAL – DO NOT COPY
No No
Check component 1
(Pb signal) C259
Is there sync?
Yes
No
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No No
Check component 1
(Pr signal) C264
Is there sync?
Yes
No
Use GProbe connect
from main to PC.
Does scaler detect the signal?
No No
Check component 1 Trace componect 1 from
(Y signal) =>C255 Input To U10 circuit
Is there sync?
Yes
No
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Trace componect 1 from
Input To U13 circuit
Check R196,R198
U13 fail
Trace componect 1 from
Input To U13 circuit
Check R204,R201
U13 fail
Check R193,R191
U10 fail
2
Page 9-7
File No. SG-0219