Hello Badcaps community...
This is my first post; hope I am dropping it in the right area. I apologies for being a bit long winded, but I am not sure how to go about explaining this any better....
I have started a audio repair/restoration side business and frequently, I am running into an issue I am not sure how to resolve. When working on older stereo receivers, the original service manuals do not always tell you what specific types of capacitors are used . For instance, I have a Yamaha CR-420 I am working on now. The majority of the electrolytic caps are one color (light blue). But then there are some that are dark blue, black, orange. (I am specifically referring to just the electrolytic caps). The Service Manual lists all it's caps as "Electrolytic Capacitor Vert." However some also have RB, TS or MS (which I have no clue what they mean and there is no legend for it.) My main question is if there a way to look at a cap and tell what type of cap it is. IOW....'Standard' vs low leakage vs low ESR vs low impedance, etc. I have a basic cap tester that will give me an ESR and capacitance reading....just not sure how to test for low-leakage. So service manuals flat out say if a cap is low leakage, but not in this case. To make it even more confusing, this particular receive has a number of 1uF, 50V caps....so are light blue, some are dark blue. If they used different brands for different values, I can see why they would be different, but you would assume if it was the exact same value, it should be the same exact cap...and it is not. This tells me SOMETHING is different about the two. If there any way to look at a cap or cross reference it against some mystery database that will tell me what spec it is?
This is my first post; hope I am dropping it in the right area. I apologies for being a bit long winded, but I am not sure how to go about explaining this any better....
I have started a audio repair/restoration side business and frequently, I am running into an issue I am not sure how to resolve. When working on older stereo receivers, the original service manuals do not always tell you what specific types of capacitors are used . For instance, I have a Yamaha CR-420 I am working on now. The majority of the electrolytic caps are one color (light blue). But then there are some that are dark blue, black, orange. (I am specifically referring to just the electrolytic caps). The Service Manual lists all it's caps as "Electrolytic Capacitor Vert." However some also have RB, TS or MS (which I have no clue what they mean and there is no legend for it.) My main question is if there a way to look at a cap and tell what type of cap it is. IOW....'Standard' vs low leakage vs low ESR vs low impedance, etc. I have a basic cap tester that will give me an ESR and capacitance reading....just not sure how to test for low-leakage. So service manuals flat out say if a cap is low leakage, but not in this case. To make it even more confusing, this particular receive has a number of 1uF, 50V caps....so are light blue, some are dark blue. If they used different brands for different values, I can see why they would be different, but you would assume if it was the exact same value, it should be the same exact cap...and it is not. This tells me SOMETHING is different about the two. If there any way to look at a cap or cross reference it against some mystery database that will tell me what spec it is?
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