26
1.3 No Power DDCON / LDO
Check Enable
IC800 #pin1 / R803
Is voltage >2.5V?
Change IC800
Change D800
no
no
START
yes
Change DDCON
IC801 or IC802 or IC803
Check Vcc voltage
C801 / CL819
Is voltage >3V?
yes
Check
D800
Is diode alive?
no
yes
Check 3.3V_STBY.
Power board
Change D801
no
Check Vcc voltage
C801 / CL819
Is voltage >4V?
yes
Check
D801
Is diode alive?
no
yes
Check 5V_MAIN DDCON (IC600)
Check IC600 Vcc voltage
C601
Is voltage >12V?
no
yes
Board
Operation
IC Ref
Voltage supply
BM5S21
DC/DC
IC801
1.1V_M5_DDR
BM5S21
DC/DC
IC802
0.9V_M5_STBY
BM5S21
DC/DC
IC803
1.8V_STBY
DDCONs Check
Please Refer page 24-25 for Ref No.
T R O U B L E S H O O T I N G
SAFETY NOTES
SELF DIAGNOSTIC FUNCTION
TROUBLESHOOTING
SERVICE ADJUSTMENT
DIAGRAM
HANDLING GUIDE
26
SYS SET
2021/02/04 23:38:48 (GMT+09:00)