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5
Step2.
Check the resistor value
of Capacitor
Step3. Short circuit check of power line and
check the output voltage
(before shutdown)
Step1.
Short circuit check
of Tr (C-E),
FET (S-D) and Diode
All OK
All OK
Shorted
Before turning on the power, please check Step1 in order to prevent farther problem.
All OK
Check Flow of SC Board Repair
Step4. Check the SOS circuit and feed back circuit
Low resistance
( shorted )
( shorted )
Shorted or
abnormal voltage
abnormal voltage
After replaced,
Also check STEP 2
before turning on the power.
Also check STEP 2
before turning on the power.
Replaced the defective components
Replaced the defective components
Replaced the defective components
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