This one is boggling me. I have a SKAR SK-2500.1 When powering it on, sometimes it will go into protect. Sometimes immediatly, other times right after the output relay engages. Even with no load on the speaker outputs.
However, other times, it will power up, and play audio normally. Nothing changes in the meantime. I can keep switching the remote lead on and off, it might power up fine 20 times no problem, then all of a sudden go into protect, switch the remote off, back on, it might power up fine again, or it may go into protect a few more times. When it does fully power on, it will not go into protection out of the blue that I have noticed, its only if you power it off and then try to power back on that it may protect. It seesm to be on start-up only.
This seems to happen more often with higher power supply input voltage. Which leads me to something else I noticed. These amplifiers are 16V capable. Which one would assume would be able to operate at voltages slightly above 16V for charging reasons. As soon as my power supply gets to 16V (I run a 14V battery bank so my charger supplies 16+ volts), it will protect every time I try to power it up. As the voltage lowers its less and less likely for it to protect.
Im thinking the over-voltage protection is faulty?
However, other times, it will power up, and play audio normally. Nothing changes in the meantime. I can keep switching the remote lead on and off, it might power up fine 20 times no problem, then all of a sudden go into protect, switch the remote off, back on, it might power up fine again, or it may go into protect a few more times. When it does fully power on, it will not go into protection out of the blue that I have noticed, its only if you power it off and then try to power back on that it may protect. It seesm to be on start-up only.
This seems to happen more often with higher power supply input voltage. Which leads me to something else I noticed. These amplifiers are 16V capable. Which one would assume would be able to operate at voltages slightly above 16V for charging reasons. As soon as my power supply gets to 16V (I run a 14V battery bank so my charger supplies 16+ volts), it will protect every time I try to power it up. As the voltage lowers its less and less likely for it to protect.
Im thinking the over-voltage protection is faulty?
What happens if you turn the charger off and work from the battery alone?
If you can confirm that it's a voltage issue, it will make troubleshooting easier.
Post photos of the main board and the PS driver board if you can't find the fault.
If you can confirm that it's a voltage issue, it will make troubleshooting easier.
Post photos of the main board and the PS driver board if you can't find the fault.
When I shut the charger off, it will still protect every time until the voltage drops below the 16V mark. It slowly goes down in voltage. I just tried it and at about 15.6V it was going into protect about 80% of the time. It is now at 15.3V and only seems to protect about 25% of the time.
I'm not sure if it is voltage related, but it appears to be.
I'm not sure if it is voltage related, but it appears to be.
Are you referring to the jumper labeled ON-9V-Off? If so, I don't see any change on any leg whether it is in or out
No. The "ON" pin appears to go to nothing?, "9V" pin reads 6.80V when the amp is powered and 0V when off. "Off" pin is supply voltage with amp on or off.
Try what? powering up the amplifier?
Removed it powers up fine. I have not tried it multiple times to see if it protects I have not tried it with it in the off position.
What is this jumper for?
Removed it powers up fine. I have not tried it multiple times to see if it protects I have not tried it with it in the off position.
What is this jumper for?
Yes. See if it malfunctions.
It's over-voltage protection. There are two different types of circuits that use the 3-pin header/shunt. One type has ground on one pin. The other has one pin connected to 12v but it's generally connected to pin 12 of the supply IC, not constant power.
It's over-voltage protection. There are two different types of circuits that use the 3-pin header/shunt. One type has ground on one pin. The other has one pin connected to 12v but it's generally connected to pin 12 of the supply IC, not constant power.
Just played wit it. Amp still randomly protects witht he jumper in the off position as well as removed. no change from it in the on position
Pin 12 has supply voltage when the amp is powered on. (14.8V currently). Pin 14 vRef has exactly 5.00V when the amp powers on.
Somewhat yes.
Here are the readings I got:
Amp powered on (no protect)
1: 17mV
2: 2.44V
3: 100mV
4: 100mV
5: 1.6V
6: 3.5V
7: 100mV
8: 14.7V
9: 5.8V
10: 5.8V
11: 14.67V
12: 14.67V
13: 5.00V
14: 5.00V
15: 5.00V
16: 0V
Amp in protect;
1: 7.22V
2: 2.5V
3: 3.87V
4: 3.2V
5: 1.6V
6: 3.5V
7: 0V
8: 15V
9: 0V
10: 0V
11: 15V
12: 15.00V
13: 5.00V
14: 5.00V
15: 5.00V
16: 0V
Here are the readings I got:
Amp powered on (no protect)
1: 17mV
2: 2.44V
3: 100mV
4: 100mV
5: 1.6V
6: 3.5V
7: 100mV
8: 14.7V
9: 5.8V
10: 5.8V
11: 14.67V
12: 14.67V
13: 5.00V
14: 5.00V
15: 5.00V
16: 0V
Amp in protect;
1: 7.22V
2: 2.5V
3: 3.87V
4: 3.2V
5: 1.6V
6: 3.5V
7: 0V
8: 15V
9: 0V
10: 0V
11: 15V
12: 15.00V
13: 5.00V
14: 5.00V
15: 5.00V
16: 0V
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