Hi Todd Thank you for replying to my previous comment. I am slowly watching the videos of your channel Now I have a problem that I am asking for your help. I have a class D amplifier called LeoDio Lc1000.1 I completely understood the switching power part However, in the amplifier section, two optocouplers called 6n137 are used along with 4 transistors, which then reach the gate MOSFETs. There is also a 555 IC next to the input op-amps, which has no frequency in pin 3. But one of the op-amps has a frequency of 129 kHz in base 1 In the control card, there is an IC called "mz9t040" which is written in the first line with the number "3l9" that I don't know what it is at all, and it has no data sheet. In the control card, there are two ICs with the number "74hc02" which are NOR gates I don't know how this circuit works. Please, if possible, give an explanation or make a video for this amplifier. thank you
Unfortunately, I am not familiar with that topology. In most amps that use the HC02s have a comparator with a Tl072 that creates the square wave. They may be using the 555 for the same purpose?
@@ellensburgamplifier Hello Thank you for your answer No, there is no frequency available for 555. Is it possible that it was used to create negative nutrition?
Agreed, I am still debating doing a live stream repair of this. It is repairable, I just would not be able to charge the customer for this as it is NETR.
Agreed! I had an amp come in that was covered in the carpet spray you can get at car washes that people spray under the seats. Liquids and amps do not mix.
Thank you Todd my salt 8 sounds better than when I first got it
Excellent! Keep it cool and not overloaded and it will run for a long time.
Thank you sir
Dang, that looks like a nightmare. Hopefully, if u do the repair, I wanna see a video of the repair
I will keep that in mind and maybe go live with this one.
Do you repair amplifiers? I have the same amplifier that needs repair
Sure do almost 7 days a week the irons are on. www.ellensburgamplifier.com/request-a-quote
Hi Todd 👨🔧🥂
Hi there! I hope all is well and I than you for dropping in :)
Hi Todd
Thank you for replying to my previous comment.
I am slowly watching the videos of your channel
Now I have a problem that I am asking for your help.
I have a class D amplifier called LeoDio Lc1000.1
I completely understood the switching power part
However, in the amplifier section, two optocouplers called 6n137 are used along with 4 transistors, which then reach the gate MOSFETs.
There is also a 555 IC next to the input op-amps, which has no frequency in pin 3. But one of the op-amps has a frequency of 129 kHz in base 1
In the control card, there is an IC called "mz9t040" which is written in the first line with the number "3l9" that I don't know what it is at all, and it has no data sheet.
In the control card, there are two ICs with the number "74hc02" which are NOR gates
I don't know how this circuit works. Please, if possible, give an explanation or make a video for this amplifier.
thank you
Unfortunately, I am not familiar with that topology. In most amps that use the HC02s have a comparator with a Tl072 that creates the square wave. They may be using the 555 for the same purpose?
@@ellensburgamplifier Hello
Thank you for your answer
No, there is no frequency available for 555. Is it possible that it was used to create negative nutrition?
@@nimaesmaeil9318 I do not know that amplifier circuit but if you ask Perry over at DIYaudio.com I am sure he can assist you on this one.
That's a really beautiful board too be damage like that 🤦♂️
Agreed, I am still debating doing a live stream repair of this. It is repairable, I just would not be able to charge the customer for this as it is NETR.
Hey tell the guy for that Amplifier to put it up on Ebay I would need that Amplifier to buy
@@cartycartyamplifiersalesrepair I think he does sell his amplifiers on Ebay. I will see what he wants to do with it.
Not a good idea to put amps under seats. Spills = disaster
Agreed! I had an amp come in that was covered in the carpet spray you can get at car washes that people spray under the seats. Liquids and amps do not mix.