8-2 . Problem Checkking And Method Of Pcb
8-2-1 The Part Of Power Source
NO Power On
YES
The Voltage Of
Betweenⓐand ⓑIsNO 
Check The Trans
As Big As 12V?
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The Voltage Of | NO | Check The Diode(D6,7,8,9,11) |
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Betweenⓒand ⓓ Is | And Condenser(CE3) |
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As Big As 12V? |
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The Voltage Of |
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NO |
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Betweenⓔand ⓓ Is |
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| Check The |
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As Big As 5V? |
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| Condenser(CE5) |
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ⓐ
TRANS ⓑ
R14
33K
D6,7,8,9 |
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D11 | ⓒ IC2 | CE5 | ⓔ | 16 |
| 7805 |
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| 47 |
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2200UF |
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| 470UF |
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R15 |
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| 17 |
33K |
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| 48 | |
| CE3 |
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| ⓓ |
| 20 | |
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16
