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8-2 . Problem Checking And Method Of PCB
8-2-1 The Part Of Power Source
NO Power On
The Voltage Of
Between ⓐ and ⓑ Is
As Big As 12V?
The Voltage Of
Between ⓒ and ⓓ Is
As Big As 12V?
The Voltage Of
Between ⓔ and ⓓ Is As
Big As 5V?
ⓐ
TRANS
ⓑ
YES
YES
YES
YES
D15,16,18,19
D17
2200UF
CE5
NO
Check The Trans
NO
Check The Diode(D15-D19) And
Condenser(CE5)
NO
Exchange TR7(7805) And Check
The Condenser(CE3)
TR7
ⓒ
CE3
7805
470UF
ⓓ
16
60
ⓔ
61
62
30
63
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