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 ▷ View online
RB2G
CHASSIS
W830B/ W840B/ W850B/ W855B
W856B/ W857B
Troubleshooting
3 4 NO PICTURE
3-4.. NO PICTURE
No Picture
3-4-1. NO PICTURE: LD Models only
All bl
i t
i
?
No
Replace
NG
Ch
k th G* LD*
OK
NG
All blue picture is on?
(Factory SW is booted.)
Yes
the B-Tcon, Tcon-LD*
FFC
Check the G*- LD*
Harness
NG
Change B* Board
Symptom
improvement
improvement
Symptom
improvement
improvement
・
B* Board
B-Tcon, Tcon-LD*
FFC
B* Board
Harness
p
p
LCD Panel
Ch
G* B
d
NG
Tuner
No Picture
HDMI
(T-con, LD*)
Change G* Board
Symptom
improvement
improvement
HDMI
No Picture
EXT. Video Input
No Picture
G* Board
No Picture
Size
B* Board
G* Board
21
60”
BAXL
G2SB
70”
BAXL
G2SB
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
RB2G
CHASSIS
W830B/ W840B/ W850B/ W855B
W856B/ W857B
Troubleshooting
3-5. SIDE BUTTONS MALFUNCTION
Side Key button
malfunction
Change Switch
Unit
Switch unit issue
OK
IR do not response to
Remote control battery
could be weak
Center white LED
lit up when
lit up when
Check whether center
white LED blink ,when
white LED blink ,when
3-6. IR REMOTE COMMANDER MALFUNCTION
Harness on Switch Unit
and BAXL
Board properly connected
Harness connection
issue
NG
OK
Remote Commander
could be weak.
Change battery.
remote is control
is pressed
is pressed
using commander near
the sensor windows
Harness on H-board
and BAXL Board
properly connected
and BAXL Board
properly connected
Harness
connection issue
Change
Switch unit-BAXL board Harness
Harness issue
NG
OK
properly connected
Change H-BAXL
board Harness
H-BAXL board harness
issue
Change BAXL
Board
NG
Change BAXL Board
Change Smart Core
or
H-board
OK
Smart core issue
or
H-board issue
NG
Note: Blue line/font for HM segment
3-7. Light Sensor Error
Backlight doesn’t change
when ambient lighting
level changed
Check UI setting for light
Sensor. Make sure it is “on”
Change the UI setting to
“:ON”
User did not activate light
sensor function
OK
OK
Harness on H-board and
BAXL Board properly connected
Harness connection
issue
NG
NG
Change
H-BAXL board Harness
OK
Smart Core issue
Change Smart Core
OK
H-BAXL board harness
issue
NG
23
Change BAXL Board
issue
NG
RB2G
CHASSIS
W830B/ W840B/ W850B/ W855B
W856B/ W857B
Troubleshooting
3-8. Network Malfunction: Ethernet (Wired)
[Network Set-up]
>[Wired Set-up]
on the TV
O
Connection
Results
Cable Connection
OK
Connection
Results
Local Access
Connection
Results
Internet Access
OK
F il d
BAXL board
OK
Proxy setting
Failed
Failed
Failed
Wired Set-up
IP address setting
Auto
Check
Local router
Check cable
BAXL board
OK
IP address setting
DHCP server
Manual
NG
Ethernet Cable
Check IP address
&
Local router setting
24
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