Vizio VM60P HDTV10A Service Manual page 92

PDP display nothing (AV1<CVBS1> without screen)
Block1
Is composite
signal on?
PDP display nothing (AV2<CVBS2> without screen)
Block1
Is composite
signal on?
ONFIDENTIAL – DO NOT COPY
Check internal cable?
N0
Connect (CN9) cable
N0 Check internal cable?
Connect (CN9) cable
Check U18 pin 6 (CVBS1)
YES
is there signal?
Check Connect Board
No
Check Q1 base is there signal?
Check collector voltage +5V
Check:
1.C3 (signal AC coupled)
YES
2.R1
3.R4 (75ohm impedance)
Is there signal?
YES Check U18 pin 4 (CVBS2)
is there signal?
Check Connect Board
No
Check Q2 base is there signal?
Check collector voltage +5V
Check:
1.C7 (signal AC coupled)
YES
2.R8
3.R9 (75ohm impedance)
Is there signal?
No
Q1 fail
No
Check input source
No
Q2 fail
No
Check input source
Page 10-3
File No. SG-0214