Sony KDL-52LX900 / KDL-60LX900 (serv.man3) Service Manual ▷ View online
KDL-52/60LX900(K)
33
TROUBLE SHOOTING
3-5. NO PICTURE
No Picture
Press HOME Key
XMB (Menu) displayed?
BUHS Board
Replace
the LVDS Harness
LCD Panel
(T-con)
Harness
(LVDS)
(LVDS)
Check
BL_ON at JL2566
on the BUHS Board
BL_ON:H
BUHS Board
Check Harness
(Between G* Board
to BUHS Board)
Harness
(G* to BUHS)
BL_ON: not H
Change BUHS Board
G* Board
NO
YES
NG
OK
NG
OK
NG
OK
PANEL_VCC
At JL3806 on the
BUHS Board
G* Board
YES
NO
about 5V ： 22” Model
about 12V : ex. 22” Model
about 12V : ex. 22” Model
KDL-52/60LX900(K)
34
TROUBLE SHOOTING
3-6. NO SOUND
No Sound
Check the Speaker
Harness
Speaker Harness
Replace
the BUHS Board
BUHS Board
Speaker
NG
OK
NG
OK
Check the
“Speakers setting”
Change to
“TV Speaker”
“Audio System”
“TV Speakers”
KDL-52/60LX900(K)
35
3-7. TV COMMANDER BUTTONS MALFUNCTION
TROUBLE SHOOTING
1) TV button malfunction
Button malfunction
on the TV
BUHS to Switch Unit
harness check
Switch Unit
Harness
Switch Unit change
BUHS Board
OK
NG
OK
NG
KDL-52/60LX900(K)
36
TROUBLE SHOOTING
2) IR remote commander malfunction
TV isn’t controlled
by remote commander
Green LED light
at power indicator
OK
NG
Sensor is broken
HLR Board
BUHS Board
OK
NG
Mechanical
(ex. bezel)
Green LED blinks
at power indicator
when using commander
near sensor’s window
Check the Harness
between the BUHS Board
and the HLR Board
Exchange the Harness
Exchange the
HLR Board
Harness
OK
NG
OK
OK
NG
NG
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