Sony KDL-32EX720 Service Manual page 104

2) 3 times blinking (DC Alert, Audio Error and Communication Error)
3 times blinking
Check D+1.2V at
pin14 of IC6005
on the B* Board
Check +3.3V_MAIN
at pins 9/10 of CN9003
on the B* Board
Check
Speaker Impedance
at SP Connector
KDL-32/37/40/46/55EX720,721,723,724,725,726,726,727,728,729(AEP/UK/RUSS)
DC_ALERT
NG
F6001,IC6005,etc
(B* Board)
OK
NG
F6003,IC6003,etc
(B* Board)
OK
AUDIO
NG
Speaker
OK
Check AUDIO+12.5V
NG
at pins 8/9 of
CN6001 on
the B* Board
OK
NG
Check +12.5V
at F4601 on
the B* Board
OK
FE/BE Communication
IC4601,etc
(B* Board)
TROUBLE SHOOTING
AUDIO
G* Board
F4601,IC4601,etc
(B* Board)
104