Vizio VP50HDTV10A Service Manual - Page 27

PDP DISPLAY NOTHINGAnalog HD1 on PIP mode without Pb signal

Get Vizio VP50HDTV10A PDF manuals and user guides View all Vizio VP50HDTV10A manuals
Add to My Manuals
Save this manual to your list of manuals

Page 27 highlights

PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pb signal) BLOCK 1 No Is picture on screen? Check component 1 No (Pb signal) ÎC255 Is there sync? Trace componect 1 from Input To U10 circuit Check R200,R198 Yes Use GProbe connect No from main to PC. Does scaler detect the signal? U10 fail PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pr signal) BLOCK 1 No Is picture on screen? Check component 1 No (Pr signal) ÎC255 Is there sync? Trace componect 1 from Input To U10 circuit Check R205,R204 Yes Use GProbe connect No from main to PC. Does scaler detect the signal? U10 fail PDP DISPLAY NOTHING(Analog HD2 without Y signal) BLOCK 1 Is picture on screen? No Check component 2 (Y signal) ÎC258,R195 Is there sync? Yes Check U23 No outnputÎpin 31 No InputÎ pin 13 Input clamp voltageÎpin 3(+5V) Output clamp voltageÎpin 32(+5V) VCC3Îpin 22,23(+5V) Input_switch_selectÎhigh(+5V) U23 fail Use GProbe connect No from main to PC. Does scaler detect the signal? U13 fail Yes Check before U23's circuit No 1.C263,C265(AC coupled) 2.R209 Input source fail 3.R216(75ohm) 3 CONFIDENTIAL - DO NOT COPY Page 9-8 File No. SG-0219

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
CONFIDENTIAL – DO NOT COPY
Page 9-
8
File No. SG-0219
3
Check component 1
(Pr signal)
C255
Is there sync?
No
Is picture on screen?
No
Trace componect 1 from
Input To U10 circuit
Check R205,R204
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
No
U10 fail
BLOCK 1
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pr signal)
Check component 1
(Pb signal)
C255
Is there sync?
No
Is picture on screen?
No
Trace componect 1 from
Input To U10 circuit
Check R200,R198
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
No
U10 fail
BLOCK 1
PDP DISPLAY NOTHING(Analog HD1 on PIP mode without Pb signal)
Check component 2
(Y signal)
C258,R195
Is there sync?
No
Is picture on screen?
No
Check U23
outnput
pin 31
Input
pin 13
Input clamp voltage
pin 3(+5V)
Output clamp voltage
pin 32(+5V)
VCC3
pin 22,23(+5V)
Input_switch_select
high(+5V)
Use GProbe connect
from main to PC.
Does scaler detect the signal?
Yes
No
U13 fail
PDP DISPLAY NOTHING(Analog HD2 without Y signal)
BLOCK 1
U23 fail
No
Check before U23’s circuit
1.C263,C265(AC coupled)
2.R209
3.R216(75ohm)
Yes
No
Input source fail