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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
1.2 No Power u-com Failure
TROUBLESHOOTING
START
yes
Check POWER_ON
CL419 Voltage.
Is the voltage >3.0V?
Try AC Off and On after few minutes.
If #pin10 keep Low, change IC401.
If #pin10 goes High few seconds and downs
to Low, Check 12.7V_MAIN Line (from G board).
no
yes
Check 12V_MON
R462 Voltage.
Is the voltage >2.6V?
Check 12.7V_MAIN Line
and 19.5V_12.7V_AUDIO Line
(from G board or LD board).
no
yes
yes
Change IC401
no
Check DC_OFF_DET
CL414 Voltage.
Is the voltage >3.0V?
Check P_ON_#1
CL418 is >3.0V?
Change IC401
no
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Check VDD
C442 Voltage.
Is the voltage >3.0V?
Check 3.3V_STBY Line
(C1708, CN1701 #9pin)
no
Check TYPE_DET
CL408 Voltage.
Is the voltage
2.6±0.2V?
no
yes
Check OPWRSB
CL411 Voltage.
Is the voltage 0V?
SOC Muffin 5 problem
IC1000
# AP17 OPWRSB
no
yes
Check PGOOD_1
CL413 Voltage.
Is the voltage >2.31V?
1.3 No POWER - DDCON/LDO
Check 0.8V_M5_CORE
DDCON (IC804)
no
yes
Type Detection Circuit problem.
Check TYPE_DET Line
(R445, R446).
SYSSET
2022/04/1901:21:05(GMT+09:00)
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