Sony KD-55A8F Service Manual page 45

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
** Detailed check all
parts at VIDEO2_DET
signal Path [R2611]
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)
OK (Vpp: 3.3 V)
NG (Vpp: 0V)
OK (Vpp: 3.3V)
**
Detailed check all parts
at CVBS3P signal path
[R2642/R2631/R2607
/C2621/C2609/VD2604]
OK
J2600 Connectivity
Problem
Condition
Muffin [IC1000]
Problem
J2600 Connector
Problem
J2600 Connectivity
Problem
Parts Broken
NG
Parts Broken
 OK Condition : No part short-circuited
**
 NG Condition : Part short-circuited
Actions to be taken
Refer to IC troubleshooting for
further investigation
Change Connector
Change Part
45
SYS SET