Sony XBR-55X900H Service Manual page 39

2021/04/27 23:25:57 (GMT+09:00)
2.4 : 4x LED Blinking (BCM_ERR)
BM5/BM5S Board
4x blinking
(BCM_ERR)
Check "LD_RDY" Voltage
on BM5 Board
"BE_LD_RDY" Voltage at CL5223
on BM5S Board
Low
BM5/BM5S
Board
SAFETY NOTES
High
or
SELF DIAGNOSTIC FUNCTION
T R O U B L E S H O O T I N G
Error Item
LD_ERR
Valhalla
BCM_ERR
LCD model ?
Yes
Replace LD board
OK
LD Board
TROUBLESHOOTING SERVICE ADJUSTMENT
Number of STBY LED Blinking
LCD
4
OLED
LCD
4
OLED
No
Panel
NG
DIAGRAM
Description
LED driver failure/LED
voltage protection
TCON internal or I2C
communication failure
LD IC initialize or I2C
communication failure
Panel power failure
39
HANDLING GUIDE
SYS SET