Hello.
Thank you for all of your support and specific replies. I am attaching a block diagram of my own understanding of the PCB and I worked and learnt through so far.
After you check the diagram here
[found at: imgur. com /a /wxc4eVu]
I have already replaced some of the parts on the PCB.
1. Replaced one swollen 16v 470uf capacitor. Others are okay.
2. Replaced the burnt PNP BR 9012 transistor with the exact model transistor.
3. Replaced the Amplifying circuit D6282 with CD6282CS model (slightly change in the name).
4. Replaced some small capacitors like 100uf 16v, 2.2uf 50v.
After completing the steps. When I power up the PCB and put the duo channel audio input 3.5mm jack I hear some buzz noises on the speaker for like 5 seconds then silent. No sound on touching the PCB at all.
Things that I am unsure about -
There are ceramic capacitors, tantalum capacitors, resistors with variations on ohms, rectifier diodes. I am not sure how to determine if they are good and bad. Also, there is another NPN transistor related to the bass sound effect. Also, I am not sure if I purchased and replaced the correct amplifier circuit, previous one model was CHMC S2702 D6282 and new ones are written CD6282CS. Because after attaching the power cable both the amplifying circuits become real hot. Like I mean it. I checked the small IC UTC4558, it's fine.
Things I am going to do -
1. Change the diodes / rectifier.
2. Give my life fixing this shi**y PCB.
I am hoping to get some quick witty steps after this reply.
Thank you all and waiting for your kind replies.
BD