I don't know what to say. That 18021 is just a driver. It's similar to the MIC4427 but has a floating high-side output. It has no ability to produce pulses on its own. Most of the 18021 drivers are driven by a 494.
I haven't given up yet.
Can you see what's driving the inputs to the 18021?
Earlier you posted the rectifiers as MUR1620CT and MUR1620CTG. Those are both positive rectifiers. That's why I asked about positive and negative rails. Do you also have MUR1620CTR rectifiers in the amp?
Can you see what's driving the inputs to the 18021?
Earlier you posted the rectifiers as MUR1620CT and MUR1620CTG. Those are both positive rectifiers. That's why I asked about positive and negative rails. Do you also have MUR1620CTR rectifiers in the amp?
Yes those are MUR1620CTR not MUR1620CTG
My head is not right, I just got over some kind of sickness, flu like but it wasn't the flu.
As you can tell by all the mistakes I made and my head is still a little foggy.
I thank you for not giving up because I really like this amp and if I can get it going I can sell it and donate the profits.
I'm going to head to bed and hopefully I feel better tomorrow.
My head is not right, I just got over some kind of sickness, flu like but it wasn't the flu.
As you can tell by all the mistakes I made and my head is still a little foggy.
I thank you for not giving up because I really like this amp and if I can get it going I can sell it and donate the profits.
I'm going to head to bed and hopefully I feel better tomorrow.
Sorry for the long wait, I wasn't feeling good and didn't want to keep giving you wrong info.
I am doing great now.
Q: Do you have a PC# on this amp?
A: The only numbers I found was on the back sticker
(2000001175-62) and on the PCB board (R600X5 and P086R00X5)
Earlier question you asked.
Q: Can you see what's driving the inputs to the 18021?
A: I'm not sure how to find that out. If you can, I would like to go into your tutorials and learn myself.
The only help would be the location of the pages I need to learn.
I am doing great now.
Q: Do you have a PC# on this amp?
A: The only numbers I found was on the back sticker
(2000001175-62) and on the PCB board (R600X5 and P086R00X5)
Earlier question you asked.
Q: Can you see what's driving the inputs to the 18021?
A: I'm not sure how to find that out. If you can, I would like to go into your tutorials and learn myself.
The only help would be the location of the pages I need to learn.
The MP18021HN-LF-datasheet.pdf datasheet is in the semiconductor datasheets folder. Ctrl-f the tutorial files for that and it will come up or go to the folder.
You can see that pins 5 and 6 are INH and INL (inputs, high and low). What is driving those terminals.
Attached is a typical circuit (not Rockford but should be similar).
You can see that pins 5 and 6 are INH and INL (inputs, high and low). What is driving those terminals.
Attached is a typical circuit (not Rockford but should be similar).
Attachments
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I looked at the data sheet and I do believe the MP18021HN is not working correctly.
I orderd some from Digikey and should be here before the end of the week.
I orderd some from Digikey and should be here before the end of the week.
Q: What's driving the input terminals? Do you see a square wave on the input terminals?
A: I'm not sure how to find whats driving the inputs or how to test the input terminals. I did put my oscilloscope on ground and positive side of the input but I remembered I took out the MUR1620's. Should I put them back in and test again?
A: I'm not sure how to find whats driving the inputs or how to test the input terminals. I did put my oscilloscope on ground and positive side of the input but I remembered I took out the MUR1620's. Should I put them back in and test again?
First, let's get everything set up to get waveforms on the PS FETs. Set the scope to DC coupling, 5v/div and 10us and probe the gates of the PS FETs. What waveform is there?
Sorry had to take a break to do my living room floor with epoxy.
Q: First, let's get everything set up to get waveforms on the PS FETs. Set the scope to DC coupling, 5v/div and 10us and probe the gates of the PS FETs. What waveform is there?
A: Let me setup the amp and see if it will stay on long enough to get a good reading and send you a picture.
Q: First, let's get everything set up to get waveforms on the PS FETs. Set the scope to DC coupling, 5v/div and 10us and probe the gates of the PS FETs. What waveform is there?
A: Let me setup the amp and see if it will stay on long enough to get a good reading and send you a picture.