Sony XR-50X9 J Series Service Manual page 68

2021/02/25 22:52:59 (GMT+09:00)
4.2 No Picture – Investigation Flow (WW destination)
Check if Analog Video
Input UI is selectable?
Check waveform
between C2825 and IC1000.
OK (Vpp: 0.56 V)
(Change Main board)
SAFETY NOTES
Video
No Picture
No
Yes
NG (Vpp: 0 V)
Is it Vpp : 0.56V?
IC1000 Problem.
SELF DIAGNOSTIC FUNCTION
T R O U B L E S H O O T I N G
Checking condition:
- TV ON, *AV conversion cable is connected to conversion jack input
(Yellow) at TV side. Composite input cable is connected to
composite source output.
- TV UI Display : Video in(WW)/AV in(EU)
Check VIDEO_DET signal at R2841
Is it 3.3V?
**Check all parts condition
at CVBS0P line.
OK
[D2800, VR2800, R2843,
R2844, R2845, R2848,
R2849, R2842, C2831]
NG
J2800 Connector
Problem.
Parts Broken.
(Change connector)
(Change Part)
** OK Condition : No part short-circuited
NG Condition : Part short-circuited
TROUBLESHOOTING SERVICE ADJUSMENT
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
*AV conversion cable spec
DIAGRAMS
J2800 Connectivity
Problem.
68 68
HANDLING GUIE
SYS SET