Sony BRAVIA KDL-55W900A, Service Manual

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RB1G
CHASSIS
W900A/904A/905A
Troubleshooting
PANEL VCC +12V BL ON (L or H)
3-5-18. NO PICTURE: (Except HFR Model)
3-5. No Picture
No Picture
Is blue picture
BL_ON
：
H
Check
PANEL_VCC = +12V
LS(G*-Board): JL9102
LW (Adaptor): JL9301 BL_ON (L or H)
LS (G*-Board): JL9111
LW (Adaptor): JL8205
Is blue picture
on display?
(Factory SW
is booted)
No
Yes
Replace
the LVDS FFC
Harness
LCD Panel
(T-CON)
NG
Check
BL_ON at JIG LAND
on the B* Board
Check
PANEL_VCC
at JIG LAND
on the B* Board
No
Yes
Symptom
・
Yes
LVDS FFC
Harness
Replace Harness
BL_ON
：
L
No
G*-Board or
Adaptor NG
Symptom
improvement
Symptom
B*-Board is OK.
Check:
between G*-Board
to B*-Board.
( LS Only )
Replace G*-Board to
B*-Board Harness
NG
improvement
Tuner - No Picture
Change B*-Board
Change G*-Board
or Adaptor (LW)
NG
HDMI - No Picture
Ext. Video Input -
Si B* B d T G* B d
B*-Board NG
Symptom
improvement
No Picture
Size B* Board Type G* Board
Type
OTHERS JP
40” BA2-S BA2-W G1A
200
B Board NG
46” BA2-S BA2-W G1A
55” BA2-S BA2-W G1B