Hi guys.
I am working with a steg k2.04 that blink the power and protection led.
removing the diode shown in the image, the amplifier turns on and works perfectly, so the problem must be in the protection circuit, but I have checked everything and I do not find any component out of value ... Has something like this happened?
I am working with a steg k2.04 that blink the power and protection led.
removing the diode shown in the image, the amplifier turns on and works perfectly, so the problem must be in the protection circuit, but I have checked everything and I do not find any component out of value ... Has something like this happened?
Attachments
Yes, they are very similar, but I have not been able to locate the component (s) that are causing the problem.
Is your signal source grounded to the same 12v power supply as the amp?
If so, it the shield ground intact?
If so, it the shield ground intact?
If I connect the radio to the same power supply as the amplifier and connect rca, it turns on perfectly. the voltage between the primary gnd and the rca gnd is 0v. there are no clicks or unusual noises in either of the 2 channels. It is also not seen that any component overheats.
Are the left and right RCA shields directly connected (0 ohms) with no RCA cables plugged into the amp?
between shields it has 30 ohm.
I have jumpered with a wire from rca shield to main power supply ground and it works
I have jumpered with a wire from rca shield to main power supply ground and it works
Do you see a bit more voltage on one RCA than the other?
The ground fault circuit is engaging. Alpine has a similar circuit that intentionally applies voltage to the secondary to detect open RCA shields. I don't think that's the purpose of this amp's circuit. If we could determine if one channel is the culprit, that would narrow things down.
If the transistor Q40 is readily available (it will likely be damaged when removed), you could remove it to see if it being leaky is the problem.
The ground fault circuit is engaging. Alpine has a similar circuit that intentionally applies voltage to the secondary to detect open RCA shields. I don't think that's the purpose of this amp's circuit. If we could determine if one channel is the culprit, that would narrow things down.
If the transistor Q40 is readily available (it will likely be damaged when removed), you could remove it to see if it being leaky is the problem.
Hello. in the 2 shields of channel L and R it gives the same 1.80v. I have removed Q40 and installed a new one, but the problem persists .....