Sony KDL-55W950B / KDL-55W955B / KDL-55W957B / KDL-65W950B / KDL-65W955B Service Manual ▷ View online
RB2G
CHASSIS
W950B/ W955B/ W957B/ M25B
21
Troubleshooting
3-4.. NO PICTURE
No Picture
All blue picture is on?
(Factory SW is booted.)
B* Board
No
Yes
Replace
the B-Tcon, Tcon-LD*
FFC
B-Tcon, Tcon-LD*
FFC
NG
B* Board
Check the G*- LD*
Harness
Harness
NG
Change B* Board
OK
NG
G* Board
LCD Panel
(T-con, LD*)
Change G* Board
NG
Symptom
improvement
Symptom
improvement
Symptom
improvement
Tuner
No Picture
HDMI
No Picture
EXT. Video Input
No Picture
・
3-4-1. NO PICTURE: LD Models only
Size B* Board G* Board
55”
BAX
G1A
65”
BAX
G2A
RB2G
CHASSIS
W950B/ W955B/ W957B/ M25B
Parts
Location/Parts
Detail
(1)
(JL9137
(PANEL_VCC)
(2)
JL9105
(BL_ON)
22
Troubleshooting
3-4-2. NO PICTURE: (All Model)
<BAX- B SIDE>
1
2
Size B* Board G* Board
55”
BAX
G1A
65”
BAX
G2A
No Picture
Is blue picture
on display?
(Factory SW
is booted)
No
Yes
Replace
the LVDS FFC
Harness
LCD Panel
(T-CON)
LVDS FFC
Harness
NG
Check
BL_ON at JIG LAND
on the B* Board
BL_ON：H
B-Board NG
Replace Harness
between G-Board/
LD-Board
to B-Board
Replace G-Board/LD-Board
to B-Board Harness
NG
BL_ON：L
Change B-Board
Change G-Board
/ LD board
NG
Check
PANEL_VCC
at JIG LAND
on the B* Board
No
G-Board or
Adaptor NG
Yes
PANEL_VCC = +12V
HS,HT(BAX): JL9137
Symptom
improvement
improvement
Symptom
improvement
Symptom
improvement
improvement
・
B-Board is OK.
Check:
Tuner –
No Picture
HDMI –
No Picture
Ext. Video Input –
No Picture
BL_ON (L or H): JL9105
JL9137
(PANEL_
VCC)
JL9105
(BL_ON)
RB2G
CHASSIS
W950B/ W955B/ W957B/ M25B
23
Troubleshooting
3-5. SIDE BUTTONS MALFUNCTION
Side Key button
malfunction
Harness on Switch Unit
and B* Board properly connected
Change
Switch unit-BAX board Harness
Harness connection
issue
Change BAX Board
Change Switch
Unit
Switch unit issue
Harness issue
OK
NG
NG
NG
OK
OK
IR do not response to
Remote Commander
Remote Commander
Remote control battery
could be weak.
Change battery.
Center white LED
lit up when
remote is control
is pressed
lit up when
remote is control
is pressed
Check whether center
white LED blink ,when
white LED blink ,when
using commander near
the sensor windows
Harness on H-board
and BAX Board
properly connected
and BAX Board
properly connected
Change H-BAXL
board Harness
H-BAXL board harness
issue
Harness
connection issue
Change BAX Board
Change Smart Core
or
H-board
OK
Smart core issue
or
H-board issue
NG
3-6. IR REMOTE COMMANDER MALFUNCTION
Note: Blue line/font for HM segment
3-7. Light Sensor Error
Change BAX Board
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”
OK
Harness on H-board and
BAX Board properly connected
Harness connection
issue
NG
User did not activate light
sensor function
OK
Change
H-BAXL board Harness
NG
OK
Smart Core issue
Change Smart Core
OK
H-BAX board harness
issue
NG
NG
RB2G
CHASSIS
W950B/ W955B/ W957B/ M25B
24
Troubleshooting
3-8. Network Malfunction: Ethernet (Wired)
[Network Set-up]
>[Wired Set-up]
on the TV
Ethernet Cable
Connection
Results
Cable Connection
Proxy setting
OK
Connection
Results
Local Access
Connection
Results
Internet Access
Failed
OK
Failed
Failed
Wired Set-up
IP address setting
Auto
Check
Local router
DHCP server
Manual
Check IP address
&
Local router setting
Check cable
BAX board
OK
NG
BAX board
OK
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