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TROUBLESHOOTING
1.3 No Power DDCON/LDO (DDCON Check)
START
Check IC600 Vcc
no
voltage
C601
Is voltage >12V?
yes
Check Vcc voltage
no
C801/C628
Is voltage >4V?
yes
Check Enable
no
IC800 #pin1/IC608 #pin4
Is voltage >2.5V?
yes
Change DDCON
IC801/IC802/IC803/IC603
Check Vcc voltage
no
C801 / C628
Is voltage >3V?
yes
Check
no
D801/D601
Is diode okay?
yes
1.2 No Power u-Com Failure
or
Enable source
Check
no
D800/D600
Is diode okay?
yes
Change D801/D601
Check 5V_MAIN DDCON (IC600)
Please Refer page 30 for Ref Number.
Board
BM5STY
Change D800/D600
Check 3.3V_STBY.
G-board
Operation IC Ref
Voltage supply
DC/DC
IC801
1.1V_M5_DDR
DC/DC
IC802
0.9V_M5_STBY
DC/DC
IC803
1.8V_STBY
DC/DC
IC603
1.0V_TU_P
32
SYS SET
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