Sony BRAVIA KDL-55W900A, Service Manual

Page: 199 / 241

RB1G
CHASSIS
W900A/904A/905A
Troubleshooting
3-5-17. NO PICTURE: (TE and HG Model)
3-5.No Picture
Size B* Board Type G* Board
Type
OTHERS JP
40” BA2-S BA2-W G1A
Note:
(AYU2)
IC9000
No Picture
Set Board
Ch k
PANEL_VCC =12V
40 BA2-S BA2-W G1A
46” BA2-S BA2-W G1A
55” BA2-S BA2-W G1B
(AYU2) – IC9000
(Brownie)- IC9001
Is blue picture
on display?
(Factory SW
is booted)
Set Board
to Panel-less
condition and
replace LVDS FFC.
Is test pattern
displayed?
Check
PANEL_VCC
from G Board at
JL9102 on
B-Board
Check GOLGO
power
and harness
condition
NO
No
OK OK
・
CHECK BL_ON on
B-Board at JL9111.
H: OK
L: NG
OK
displayed?
B-Board is OK.
Ch k
LVDS FFC
Harness
G-Board
Or
GOLGO Power
H FFC
YES
NG
NG YES
G-Board, B-Board
Or
NG
Check:
Harness
Broken
Power Harness
Harness or FFC
Power Harness
Check/Change
TCON
Mini-LVDS FFC
to Panel
Panel problem
NG
Check
Flash Data
OK
Tuner - No Picture
HDMI - No Picture
Change T-CON
or GOLGO
NG
Mini LVDS FFC
broken
OK
Rewrite Data
Ext. Video Input -
No Picture
NG
T-CON or GOLGO
NG
OK
199
broken
NG