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TROUBLESHOOTING
4.2 No Picture – Investigation flow – XR-83A80*
No Picture
Video
No Picture
Check if input OSD
is GREY OUT
OK if it is highlighted
OK
Check wave between
C2825 and IC1000
OK (Vpp: 0.56 V)
Muffin [IC1000]
Problem
NG
*
Check J2800 Connection,
VIDEO_DET
At R2841
OK (Vpp: 3.3 V)
**
Detailed check all
parts at VIDEO_DET
signal Path [R2840]
OK (Vpp: 3.3V)
NG (Vpp: 0 V)
by using any
※
Oscilloscope
J2800 Connector
Problem
*
OK Condition : No solder splash can be seen
NG Condition : Solder splash can be seen
NG (Vpp: 0V)
NG (Vpp: 0V)
**
Detailed check all parts at CVBS0P
signal path [R2843/R2844/R2845
/R2852/R2853/VR2800/D2800
J2800 Connectivity
Problem
NG
OK
Parts Broken
**
OK Condition : No part short-circuited
NG Condition : Part short-circuited
99
SYS SET
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