Sony KDL-22EX420 Service Manual page 21

Trouble Shooting
3-2-2. 3-times blinking( DC Alert & Audio Error)
3-times blinking
Check D+1.2V at
JL6007
on the B* Board
OK
Check +3.3V_MAIN
at JL9234 on
the B* Board
OK
Speaker Impedance
at SP Connector
OK
DC_ALERT
NG
F6001,IC6005,etc
(B* Board)
NG
F6003,IC6003,etc
(B* Board)
AUDIO
Check
NG
Speaker
KDL- 22 EX423, 26 EX423, 32 EX420, 32, 40, 46 EX523
AUDIO
Check AUDIO
NG
+12.5V at pin 8/9 of
CN6001 on
the B* Board
OK
Check +12.5V
NG F4601,IC4601,etc
at F4601 on
the B* Board
OK
IC4601,etc
(B* Board)
Note: B* and G* Board
Segment
P-1
P-1
P-1
P-1
P-1
20
KDL- 22, 26 EX420, 32,40,46 EX520
G* Board
(B* Board)
Size B* Board Type G* Board Type
22 BAT-S
26 BAT-S
32 BAT-V
40 BAT-V
46 BAT-V
RM-GD020, CD013
RM-GD020
G1A
G1B
GE2A
GE3A
GE3A