Sony XBR-55X850D Service Manual page 45

FLOW
4-2. NO PICTURE (VIDEO) (CH/MX/BR/PA/COL/LA)
Video 1
No Picture
*
Check J7505
NG
Check if input OSD
Connection,
is GREY OUT
VIDEO2_DET
OK if it is highlighted
At R7562
OK
**
Detailed check all
parts at VIDEO2_DET
Signal Path [R7561]
NG (Vpp: 0 V)
Check wave between
C7511 and IC1000
OK (Vpp: 1 V)
Muffin [IC1000] J7505 Connector
Problem
Problem
XBR-55X850D/857D, 65X850D/855D/857D, 75X850D
No Picture Video
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
**
Detailed check all parts
at CVBS2P signal path
[D7514/R721/C7521/
R7519/C7534]
OK
J7505 Connectivity
Problem
*
Video 2
No Picture
NG
Check if input OSD
is GREY OUT
OK if it is highlighted
OK
NG
NG (Vpp: 0 V)
Check wave between
C7512 and IC1000
OK (Vpp: 1 V)
Muffin [IC1000]
Parts Broken
Problem
 OK Condition : No solder splash can be seen
 NG Condition : Solder splash can be seen
*
Check J7504
NG (Vpp: 0 V)
Connection,
VIDEO_DET
At R7539
OK (Vpp: 3.3 V)
**
Detailed check all
NG (Vpp: 0 V)
parts at VIDEO_DET
Signal Path [R7535]
OK (Vpp: 3.3 V)
**
Detailed check all parts
at CVBS3P signal path
[D7530/R7524/R7525]
J7504 Connector
J7504 Connectivity
Problem Problem
 OK Condition : No part short-circuited
**
 NG Condition : Part short-circuited
TROUBLE SHOOTING
NG
OK
Parts Broken
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