Sony KDL-52LX900 / KDL-60LX900 Service Manual ▷ View online
KDL-52/60LX900(Hong Kong,Australia,New
Zealand,South Africa,,GA-Analog Area)
25
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(Hong Kong,Australia,New
Zealand,South Africa,,GA-Analog Area)
26
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(Hong Kong,Australia,New
Zealand,South Africa,,GA-Analog Area)
27
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
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
KDL-52/60LX900(Hong Kong,Australia,New
Zealand,South Africa,,GA-Analog Area)
28
TROUBLE SHOOTING
3) 4 times blinkings (Balancer Error)
4 times Blinkings
Check
PANEL_FAIL at
JL2565
on the BUHS Board
BUHS Board
PANEL
(Balancer)
Between 0.84V to 2.65V
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