Hello, I have on an old alphasonik that I was recently given. It supposedly worked fine & just needed a new rca input jack soldered on. Problem is when I was done and started to test, only the left side was playin, and then i noticed the right speaker was smokin and a glowing circle was starting to burn through the dustcap. After shutting everything down, I connected my meter to the left side (for reference) to see what dc voltage was present on output & it was goin between under a volt to just over 2 or 3 volts. However when i did the same on the right side I got a reading of 30 volts. Ive been fixin amps for years, but dont have alot of experience troubleshooting, so any help with where I should start looking would be greatly appreciated. Thank you.
Some of these discrete amp designs can be difficult. To start, look for open or leaky transistors, bad solder connections of obviously burned components. If you're unsure of a reading and you can find the corresponding component in the other channel, you may be able to determine if the reading is normal before pulling the component.
Alphasonik A-2055
I believe I may have found the faulty component. I believe it is a rectifier or diode of sorts, but it appears to have a "V" shaped crack in the case. However I'm not sure how to test it. I've tried finding a similar part by entering the number on the case (C2556) into a cross reference database with very few results. I've included a couple of pics of the suspect component. If you could let me know if you think that component being damaged would cause the problem I'm having, what it actually is, how to test it and any suitable replacements, I'd greatly appreciate it. It is the one on the right. Also should I replace them both or just the damaged one? Thank you for all of your help and your quick response.
I believe I may have found the faulty component. I believe it is a rectifier or diode of sorts, but it appears to have a "V" shaped crack in the case. However I'm not sure how to test it. I've tried finding a similar part by entering the number on the case (C2556) into a cross reference database with very few results. I've included a couple of pics of the suspect component. If you could let me know if you think that component being damaged would cause the problem I'm having, what it actually is, how to test it and any suitable replacements, I'd greatly appreciate it. It is the one on the right. Also should I replace them both or just the damaged one? Thank you for all of your help and your quick response.
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The ESAC25M-02C is a positive rectifier (electrically equivalent to the MUR1620CT). The ESAC25M-02N (negative rectifier) is the electrical equivalent of the MUR1620CTR.
Pull the suspect rectifier and check from the center leg to the outer legs. With the red on the outer legs, you should read a diode. With the red on the center leg, you should not read any continuity.
Pull the suspect rectifier and check from the center leg to the outer legs. With the red on the outer legs, you should read a diode. With the red on the center leg, you should not read any continuity.
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