Read Sony KDL-60W840B / KDL-60W850B / KDL-60W855B / KDL-60W857B / KDL-60W858B / KDL-70W830B / KDL-70W840B / KDL-70W850B / KDL-70W855B / KDL-70W856B / KDL-70W857B Service Manual online
RB2G
CHASSIS
W830B/ W840B/ W850B/ W855B
W856B/ W857B
Troubleshooting
3-4-2. NO PICTURE: (All Model)
1
2
No Picture
BL_ON：H
PANEL_VCC = +12V
HE,HM (BAX-L):
HE,HM (BAX-L):
JL9132
BL_ON (L or H):
JL9105
Is blue picture
on display?
(Factory SW
(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
improvement
improvement
・
<BAXL- B SIDE>
Parts
Detail
LVDS FFC
Harness
Replace Harness
between G-Board/
LD Board
Replace G-Board/LD-Board to
B Board Harness
BL_ON：L
G-Board or
Adaptor NG
improvement
Symptom
improvement
improvement
BAXL
Board is OK.
Check:
Location/Parts
(1)
(JL9132
(PANEL_VCC)
JL9132
LD-Board
to B-Board
B-Board Harness
NG
NG
Tuner –
No Picture
HDMI –
N Pi t
(PANEL_VCC)
Change
B-Board
Change G-Board
/ LD board
NG
Symptom
improvement
improvement
No Picture
Ext. Video
Input -
No Picture
(2)
JL9105
(BL_ON)
JL9105
(BL_ON)
BAXL Board NG
improvement
Size
B* Board
G* Board
22
60”
BAXL
G2SB
70”
BAXL
G2SB
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