Sony XBR-55X850D Service Manual page 47

FLOW
4-3. NO PICTURE (COMPONENT) (CH/MX/BR/PA/COL/LA)
No Picture Video
XBR-55X850D/857D, 65X850D/855D/857D, 75X850D
Component
No Picture
*
Check J7504 Con
NG
Check if input OSD
NG (Vpp: 0 V)
VIDEO_DET at
is GREY OUT
R7539,
OK if it is highlighted
CR_DET at R7538
OK
OK (Vpp: 3.3 V)
** Detailed check all parts
at VIDEO_DET signal
Path [R7535] and CR_DET
signal path [R7534]
OK (Vpp: 3.3 V)
Check wave
NG (Vpp: 0 V)
Between
C7515/C7518/C7520
and IC1000
OK (Vpp: 1 V)
Muffin [IC1000] J7504 Connector
Problem
Problem
 OK Condition : No solder splash can be seen
*
 NG Condition : Solder splash can be seen
NG (Vpp: 0 V)
** Detailed check all parts
at signal path of:
Y1P : [D7530/R7524/C7514/
R7527]
PB1P : [VD7508/R7529/C7517/
R7530]
PR1P : [VD7509/R7532/C7519/
R7553]
OK
J7504 Connectivity
Problem
 OK Condition : No part short-circuited
**
 NG Condition : Part short-circuited
TROUBLE SHOOTING
NG
Parts Broken
47