Sony KD-49X9 F Series Service Manual page 46

4.2 : No Picture (BM2A)
No Picture
Video
No Picture
NG
*
Check J2600
Check if input OSD
Connection,
is GREY OUT
VIDEO2_DET
OK if it is highlighted
At R2612
OK (Vpp: 3.3 V)
OK
** Detailed check all
parts at VIDEO2_DET
signal Path [R2611]
OK (Vpp: 3.3V)
NG (Vpp: 0 V)
Check wave between
C2609 and IC1000
OK (Vpp: 1 V)
Muffin [IC1000]
J2600 Connector
Problem
Problem
 OK Condition : No solder splash can be seen
*
 NG Condition : Solder splash can be seen
[All voltage measurement using Oscilloscope]
NG (Vpp: 0V)
NG (Vpp: 0V)
**
Detailed check all parts
NG
at CVBS3P signal path
[R2642/R2631/R2607
/C2621/C2609/VD2604]
OK
J2600 Connectivity
Parts Broken
Problem
Condition Actions to be taken
Refer to IC troubleshooting for
Muffin [IC1000]
Problem
further investigation
J2600 Connector
Problem
Change Connector
J2600 Connectivity
Problem
Change Part
Parts Broken
 OK Condition : No part short-circuited
**
 NG Condition : Part short-circuited
46