Samsung WF-R1061 - Problem Checking and Method of Pcb

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6-2. PROBLEM CHECKING AND METHOD OF PCB
6-2-1. The Part Of Power Source
YES
YES
NO
YES
NO
YES
ok
NO Power On
Check The DIODE(D18~D21)
The Voltage Of
BetweeneandfIs
As Big As DC300V?
The Voltage Of
Betweenaandbis
as big as DC 12V?
The Voltage Of
Between d and b is
as big as DC5V
NO
Check LVT1
And IC3
Exchange IC4(7805)And Check
The condenser(CE4)
¤—
a
b
d
c
e
f
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