30
LDOs check
Check Enable pin
voltage
Is voltage >3V?
1.2 No Power U-Com Failure
or
Enable source
no
START
yes
Change LDO IC
Check Vcc voltage
C4xx/C6xx/C66xx
Is voltage >3V?
Check 3.3V_DDC_OUT
DDCON
(IC403 on BM3J19)
or
3.3V_STBY (G* board)
no
yes
yes
Please refer page-26~29 for
Ref number.
BM3J19 Board Model
Board
Operation
IC Ref
Voltage supply
BM3J19
LDO
IC400
1.2V_HDMI
BM3J19
LDO
IC602
1.05V_M3_STBY
BM3J19
LDO
IC603
1.05V_M3_ST_ET
BM3J19
LDO
IC606
2.5V_M3_DDR
BM3J19
LDO
IC607
1.8V_EMMC
BM3J19
LDO
IC6600
1.8V_BE_LDO
1.3 No Power DDCON/LDO
SYS SET
2019/04/19 01:55:00 (GMT+09:00)