Sony XR-55A75L Service Manual page 64

TROUBLESHOOTING
2.1 LED Blinking: 3x (DC ALERT) – XR-83A80*
3x blinking
(DC Alert)
No Yes
"12.7V_MAIN" Voltage > 13.2V?
4.959V < "5.0V_VBUS" Voltage < 5.285V? Retry
BM5S21 : C611 [2]
BM5S21 : Pin 5, 7 of CN1700
Yes No
G* Board B* Board
64
SYS SET