Sony GN1G - Page 57

57
KDL-50W800C, 805C, 807C, 809C/KDL-55W800C, 805C
TROUBLE SHOOTING
3-5-2. No Picture (BMX) (b)
No Picture Video
Component
No Picture
Check wave
Between
C7515/C7518/C7520
and IC1000
** Detailed check all parts
at signal path of:
Y1P : [VD7507/R7524/C7514/
R7527]
PB1P : [VD7508/R7529/C7517/
R7530]
PR1P : [VD7509/R7532/C7519/
R7553]
OK
Check if input OSD
is GREY OUT
OK if it is highlighted
NG
* Check J7504 Con
VIDEO_DET at
R7539,
CR_DET at R7538
Muffin [IC1000]
Problem
** Detailed check all parts
at VIDEO_DET signal
Path [R7535] and CR_DET
signal path [R7534]
Parts Broken
J7504 Connector
Problem
OK
NG
J7504 Connectivity
Problem
OK (Vpp: 1 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 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]