A friend of mine found a Yaqin MC-10L that belonged to his father in storage and gifted it to me. A few months ago I hooked it up to a pair of Paradigm Monitor 11 V5 loudspeakers and played some music through it. After about 5 minutes I saw a white flash of light and heard a pop, followed by a foreign smell. I quickly turned the unit off but for the short period of time that it took me to get to the unit, I started to hear a hum and if I remember correctly a loss of power in the right channel.
This morning I had some time to disassemble it and was expecting to find a blown capacitor. Much to my surprise, all of the capacitors looked fine, however, the resistor in the pictures attached looked odd. I measured the resistance of the other resistor in the photo with the same color code and observed that the resistance was approximately 10.2 (not sure if that is ohms, milliohms, etc, but 10.2 nonetheless). For good measure I also measured the same resistors on the other side of the amplifier (presumably the left channel and they were also in the 10.1 - 10.3 range. When I measured the resistance of the weird-looking resistor it showed .3. So I assume that the resistor is blown and needs to be replaced.
My question is what is the possibility that it was just the resistor that was bad and the rest of the circuit is good, or do you think that there is possibly something else wrong that caused the resistor to blow? I don’t have a lot of electronics diagnostic experience and if I have to troubleshoot the circuit for something else wrong, then I will take it to a professional, but if you think that it is simply the resistor, it is easy enough for me to remove that one and replace it with a new one.
Thanks in advance for your help, should you choose to respond.