Sony KDL-52LX900 / KDL-60LX900 (serv.man3) Service Manual ▷ View online
KDL-52/60LX900(K)
25
TROUBLE SHOOTING
3-2. FLOW CHART
START
Does the Power Led
stay on when the
TV is switched on ?
Is the Standby Led
blink ?
Is the Picture and
Sound OK ?
Do the buttons
on the TV & Remote
Commander work
properly?
END
See
No Power
No Power
See
Standby LED Blink
Standby LED Blink
See
No Picture / No Sound
No Picture / No Sound
See
TV/ Commander
button malfunction
TV/ Commander
button malfunction
Is the network
connection OK?
See
Can’t connect network
Can’t connect network
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
Is the camera
function OK?
See
Camera malfunction
Camera malfunction
No
Yes
See
3D malfunction
3D malfunction
No
Yes
Is the 3D
function OK?
KDL-52/60LX900(K)
26
TROUBLE SHOOTING
3-3. NO POWER
No Power
Check STBY 3.3V
at 1 pin of CN3800
on the BUHS Board
Harness
G* Board
Replace
Between G* Board to
BUHS Board Harness
BUHS Board
NG
OK
NG
OK
KDL-52/60LX900(K)
27
1) 2 times blinkings (Main Power Error)
TROUBLE SHOOTING
3-4. STANDBY LED BLINK
2 times Blinkings
Check REG12V at
pins 6/7 of
CN3800 on
the BUHS Board
BUHS Board
Harness
G* Board
Replace
Between G* Board to
BUHS Board Harness
12V NG
12V OK
NG
OK
KDL-52/60LX900(K)
28
TROUBLE SHOOTING
2) 3 times blinkings (DC Alert, Audio Error and Communication Error)
3 times Blinkings
Check D+3.3V at
JL3715 or JL3716
on the BUHS Board
IC4200,etc
(BUHS Board)
F3700,IC3700,etc
(BUHS Board)
Speaker
Check +5V_MAIN
at JL3731 or JL3732 on
the BUHS Board
Check
Speaker Impedance
at SP Connector
F3701,IC3701,etc
(BUHS Board)
Check
X_ASW_PROTECT
at pin 29 of IC5000
on the BUHS Board
on the BUHS Board
Check +12.5V
at pin 2 of
CN3800 on
the BUHS Board
G* Board
Check +12.5V_AU1
at F4200 on
the BUHS Board
F4200,IC4200,etc
(BUHS Board)
IC9000,etc
(BUHS Board)
DC_ALERT
NG
OK
AUDIO
AUDIO
FE/BE Communication
NG
OK
NG
OK
NG
OK
NG
OK
Pin: Low
Pin: High
Click on the first or last page to see other KDL-52LX900 / KDL-60LX900 (serv.man3) service manuals if exist.