Sony XBR-65X930C Service Manual page 154

3-5-5. No Picture J/UC/HK/TW Destination (BMFL/BMFW)
Video1
No Picture
NG *
Check J7501
Check if input OSD
Connection,
is GREY OUT
VIDEO2_DET
OK if it is highlighted
At R7537
OK
** Detailed check all
parts at VIDEO2_DET
Signal Path [R7556]
NG (Vpp: 0 V)
Check wave between
C7511 and IC1000
OK (Vpp: 1 V)
Muffin [IC1000] J7501 Connector
Problem Problem
[All voltage measurement using Oscilloscope]
XBR-65X930C, 75X940C, 945C
No Picture
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
[D7505/R7559/
C7511etc]
OK
J7501 Connectivity
Parts Broken
Problem
Video2
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]
Problem
 OK Condition : No solder splash can be seen
*
 NG Condition : Solder splash can be seen
TROUBLE SHOOTING
*
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
NG
OK
Parts Broken
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