Objects on the picture:

1 A  =  A Mains Transformer that delivers power to the 30 volt terminal
1 B  =  A Mains Transformer that delivers power to the 5 volt terminal
            and also to the controlling unit of 30 volt terminal.
2  =  A Rectifying Bridge that works to the 30 volt terminal
3  =  Four Glossing Capacitors that work to the 30 volt terminal
4 A  =  A PCB that works to the 30 volt terminal
4 B  =  A PCB that works to the 5 volt terminal

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