No Picture Aep Destination (Bmfl/Bmfw) Video - Sony XBR-55X850C Service Manual

3-5-2. No Picture AEP Destination (BMFL/BMFW) VIDEO

Video 2
No Picture
NG
*
Check J7504
Check if input OSD
Connection,
is GREY OUT
VIDEO_DET
OK if it is highlighted
At R7539
OK
** Detailed check all
parts at VIDEO_DET
signal Path [R7535]
NG (Vpp: 0 V)
Check wave between
C7512 and IC1000
OK (Vpp: 1 V)
Muffin [IC1000] J7504 Connector
Problem Problem
[All voltage measurement using Oscilloscope]
XBR-55/65X850C, 855C, 857C, 75X850C, 855C
No Picture AEP
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
**
Detailed check all parts
at CVBS3P signal path
[D7530/R7524/R7525]
OK
J7504 Connectivity
Problem
Component
No Picture
NG
*
Check if input OSD
is GREY OUT
OK if it is highlighted
CR_DET at R7538
OK
** Detailed check all parts
at VIDEO_DET signal
Path [R7535] and CR_DET
signal path [R7534]
NG Check wave
NG (Vpp: 0 V)
Between
C7515/C7518/C7520
and IC1000
OK (Vpp: 1 V)
Muffin [IC1000] J7504 Connector
Parts Broken
Problem
 OK Condition : No solder splash can be seen
*
 NG Condition : Solder splash can be seen
TROUBLE SHOOTING
Check J7504 Con
NG (Vpp: 0 V)
VIDEO_DET at
R7539,
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
**
Detailed check all parts
at signal path of:
Y1P : [D7530/R7524/C7514/
PB1P : [VD7508/R7529/C7517/
PR1P : [VD7509/R7532/C7519/
J7504 Connectivity
Problem Problem
 OK Condition : No part short-circuited
**
 NG Condition : Part short-circuited
NG
R7527]
R7530]
R7553]
OK
Parts Broken
158