Sony XBR-49X835C, Service Manual

Page: 111 / 160

XBR-43X830C, 49X830C, 835C, 837C
111
TROUBLE SHOOTING
3-5-5. No Picture J/UC/HK/TW Destination (BMFL/BMFW)
No Picture
Video1
No Picture
Video2
No Picture
Check wave between
C7512 and IC1000
Check if input OSD
is GREY OUT
OK if it is highlighted
OK
NG
Check wave between
C7511 and IC1000
Check if input OSD
is GREY OUT
OK if it is highlighted
OK
NG
Muffin [IC1000]
Problem
Muffin [IC1000]
Problem
** Detailed check all parts
at CVBS2P signal path
[D7505/R7559/
C7511etc]
*
Check J7501
Connection,
VIDEO2_DET
At R7537
J7501 Connectivity
Problem
**
Detailed check all
parts at VIDEO2_DET
Signal Path [R7556]
Parts Broken
J7501 Connector
Problem
OK
NG
**
Detailed check all parts
at CVBS3P signal path
[D7530/R7524/R7525]
*
Check J7504
Connection,
VIDEO_DET
At R7539
J7504 Connectivity
Problem
**
Detailed check all
parts at VIDEO_DET
Signal Path [R7535]
Parts Broken
J7504 Connector
Problem
OK
NG
OK (Vpp: 1 V)
NG (Vpp: 0 V)
OK (Vpp: 1 V)
NG (Vpp: 0 V)
**

OK Condition : No part short-circuited

NG Condition : Part short-circuited
*

OK Condition : No solder splash can be seen

NG Condition : Solder splash can be seen
[All voltage measurement using Oscilloscope]
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)