Sony KDL-22PX300 Service Manual ▷ View online
KDL-22PX300(AEP/UK/RUSSIA)
33
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 BAL Board
IC4200,etc
(BAL Board)
F3700,IC3700,etc
(BAL Board)
Speaker
Check +5V_MAIN
at JL3731 or JL3732 on
the BAL Board
Check
Speaker Impedance
at SP Connector
F3701,IC3701,etc
(BAL Board)
Check
X_ASW_PROTECT
at pin 29 of IC5000
on the BAL Board
Check +12.5V
at pin 2 of
CN3800 on
the BAL Board
GD1 Board
Check +12.5V_AU1
at F4200 on
the BAL Board
F4200,IC4200,etc
(BAL Board)
IC9000,etc
(BAL Board)
DC_ALERT
NG
OK
AUDIO
AUDIO
FE/BE Communication
NG
OK
NG
OK
NG
OK
NG
OK
Pin: Low
Pin: High
KDL-22PX300(AEP/UK/RUSSIA)
34
TROUBLE SHOOTING
3) 4 times blinkings (Balancer Error)
4 times Blinkings
Check
PANEL_FAIL at
JL2565
on the BAL Board
BAL Board
PANEL
(Balancer)
Between 0.84V to 2.65V
KDL-22PX300(AEP/UK/RUSSIA)
35
TROUBLE SHOOTING
4) 5 times blinkings (T-con Error)
5 times Blinkings
Check PANEL_VCC
at JL3806
on the BAL Board
GD1 Board
Between GD1 to Panel
harness check
(a)
LVDS Harness
check
Panel (T-con)
change
BAL Board
Harness
LVDS Harness
Panel (T-con)
about 5V ： 22” Model
about 12V : ex. 22” Model
about 12V : ex. 22” Model
(a) exclude 60Hz Panel Model
NG
OK
NG
OK
NG
OK
NG
OK
KDL-22PX300(AEP/UK/RUSSIA)
36
TROUBLE SHOOTING
5) 6 times blinkings (Backlight Error)
6 times Blinkings
Check
PANEL_FAIL at
JL2565
on the BAL Board
GD1 Board
BAL Board
Under 2.65V
Change GD1 Board
NG
OK
Over 2.65V
Panel (T-con)
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