36
Board Operation IC Ref Voltage supply
BM5S21
DC/DC IC418 5.0V_STBY_H
LDO IC403 3.3V_MAIN_H
LDO IC806 1.8V_M5_ET_STBY
LDO IC809 3.3V_M5_STBY
1.3 No Power DDCON/LDO (DDCON Check) – XR-83A80*
TROUBLESHOOTING
Check Enable pin
voltage
Is voltage >3V?
1.2 No Power U-Com Failure
or
Enable source
no
START
yes
Change DDCON
Or LDO IC
Check Vcc voltage
C4xx/C8xx
Is voltage >3V?
Check 3.3V_STBY (G* board)
no
yes
yes
Please Refer page 31 for Ref Number.
SYSSET
2023/11/2806:39:49(GMT+09:00)
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