I'm attempting to troubleshoot an old guitar amp and this component appears to be blown out.
Can someone here help me identify this component?
Electronic – Help Identifying Component from guitar amp
amplifiercomponentsidentification
Related Solutions
Looks like a late 1950's/early 60's Germanium transistor. Use a multimeter in diode testing setting to figure out where the PN junctions are. You should see some 0.3V forward voltage across these, and in reverse, the multimeter should display an open circuit.
The part with two pins and a black bead sticking out past the edge of the board looks to be a thermistor (temperature-sensitive resistor). You can disconnect it from the PCB and measure its nominal resistance at room temperature with a resistance meter. My guess is it'll probably be 10k (a very common value), but it could be just about anything. Then cover it with your fingers and see if the resistance goes up or down. If it goes up then it is a PTC (positive temperature coefficient) thermistor, and if it goes down it is an NTC (negative temperature coefficient) thermistor. I use a 10k NTC thermistor on a lot of products at work that looks nearly identical to this one (not that that says much) but it is a PR103J2 from US Sensor. If you're lucky maybe this is similar.
The black blob on the top side of the board is a COB and is probably an ASIC (application-specific integrated circuit) die covered up in goop. That will most likely be a custom part and will not be identifiable.
Best Answer
The capacitor (50uF/6.4V aluminum electrolytic) looks a lot like a Philips part except for the beige sealant on the left (positive) end (they stopped making that kind of component decades ago, I believe Vishay picked up the line or was spun off). Maybe a long life version or one made by another company. The use of a comma rather than a period as the radix point most likely indicates European design.
You need to put the replacement in the same polarity as the original was or bad things will happen. The negative side is the one with the black ring. Hopefully you made note of that (e.g. by taking a photo) before hacking the part out.