Hello!
I bought this computer speaker system a couple of years ago (out of warranty) and it died on me shortly afterward. The brand and model of the system are not relevant for the sake of the question.
Now, the sanest thing to do would be to say "shit happens" and go on with my life. However, I took this as a chance to reverse engineer the PCB and fix it by myself. I hope to learn something new in the process because this is the first time for me to reverse engineer anything (I am still a student).
I am at a good point in the process of laying down the schematics but there is a part of the circuit that I do not understand at all.
https://drive.google.com/file/d/15M6652Yy4cdyIDQcpn84TPJSrajZP-OP/view?usp=sharing
As you can see after the high-pass filter there is a series of capacitors and resistors in seemingly random order. I am talking about R4, C4, R7, R8, C5, CE2, R24, C15, R27. I could not determine the capacitor values without desoldering them. Anyway, I just want to understand the qualitative behavior of the circuit. My question is:
BTW I have emailed the company asking for the schematics but, understandably, they refused my request.
Thank you
I bought this computer speaker system a couple of years ago (out of warranty) and it died on me shortly afterward. The brand and model of the system are not relevant for the sake of the question.
Now, the sanest thing to do would be to say "shit happens" and go on with my life. However, I took this as a chance to reverse engineer the PCB and fix it by myself. I hope to learn something new in the process because this is the first time for me to reverse engineer anything (I am still a student).
I am at a good point in the process of laying down the schematics but there is a part of the circuit that I do not understand at all.
https://drive.google.com/file/d/15M6652Yy4cdyIDQcpn84TPJSrajZP-OP/view?usp=sharing
As you can see after the high-pass filter there is a series of capacitors and resistors in seemingly random order. I am talking about R4, C4, R7, R8, C5, CE2, R24, C15, R27. I could not determine the capacitor values without desoldering them. Anyway, I just want to understand the qualitative behavior of the circuit. My question is:
- Do you know what kind of purpose those components (R4, C4, R7, R8, C5, CE2, R24, C15, R27) have?
BTW I have emailed the company asking for the schematics but, understandably, they refused my request.
Thank you
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