Hi,
I have the Lepai LP2020A+ (Smd version) and I got an external battery for mine and when connecting the battery to the amp I got the polarities the wrong way round and think I’ve blown it!! 🙁
It all seems to work but just doesn’t let any sound out the speakers.
I cant see any component or track burnt or anything.
When I flick the switch the blue light turns on and if I put my ear close to the amp and with no speakers attached I can hear the music playing very faintly (I think its those round black things with 100 written on them).
Has anyone got any suggestions for what I can try or possible things that could be wrong with it.
-Thanks
I have the Lepai LP2020A+ (Smd version) and I got an external battery for mine and when connecting the battery to the amp I got the polarities the wrong way round and think I’ve blown it!! 🙁
It all seems to work but just doesn’t let any sound out the speakers.
I cant see any component or track burnt or anything.
When I flick the switch the blue light turns on and if I put my ear close to the amp and with no speakers attached I can hear the music playing very faintly (I think its those round black things with 100 written on them).
Has anyone got any suggestions for what I can try or possible things that could be wrong with it.
-Thanks
Just to add when i used to switch my amp on it used to make a clicking noise like a replay clicking on but now it no longer does that!
Do you have a multimeter, or anything else that could be used to troubleshoot?
You could use a signal source, with a 1uF cap in series at one end of the wire, and touch the other capacitor lead to pin 10 or pin 13 of the TA2020 chip. While the unit is powered on. If you don't get audio out to the speakers, put your Lepai in your junk box for parts and buy a new one.
This is intentionally brief. Further details on request.
You could use a signal source, with a 1uF cap in series at one end of the wire, and touch the other capacitor lead to pin 10 or pin 13 of the TA2020 chip. While the unit is powered on. If you don't get audio out to the speakers, put your Lepai in your junk box for parts and buy a new one.
This is intentionally brief. Further details on request.
Ok done a bit of testing today and it seems like the TA2020 chip is working just fine as I measured pins 10 & 13 and they were 2.5 each. I then connected a speaker to pins 21 & 23 and another speaker to pins 24 & 26 and the sound came out the speakers just fine and also what I wasn't expecting was that the volume control still was controlling the volume.
Could I just solder a wire from them pins straight to the output/speaker block and miss everything in between, would that be safe or a bad idea?
Its hard to work out which components and in between the the TA2020 chip and the output speakers connection block on this board, can anyone identify which ones are and then I can try and eliminate them one by one and fingers crossed get it working.
-Thanks
Could I just solder a wire from them pins straight to the output/speaker block and miss everything in between, would that be safe or a bad idea?
Its hard to work out which components and in between the the TA2020 chip and the output speakers connection block on this board, can anyone identify which ones are and then I can try and eliminate them one by one and fingers crossed get it working.
-Thanks
That would be an incredibly bad idea. And if you do it will probably land you in jail, or at the very least land you a huge fine. Spread spectrum RF noise transmitters are generally frowned upon in any country.
It seems from the testing I have done that the component that is failing is the "Omron G5PA-2"
does this sound right or would this component failure not cause the amp to light up and sound not to work?
I am trying to source this component and see if its cost effective to replace, anyone know where I can get it or an equivalent from cheap?
-Thanks
does this sound right or would this component failure not cause the amp to light up and sound not to work?
I am trying to source this component and see if its cost effective to replace, anyone know where I can get it or an equivalent from cheap?
-Thanks
just a thought could I bypass the Omron G5PA-2 but just on the pins for the negative speaker terminals? would that be a bad idea/ illegal or dangerous?
You can bypass the relay, yes. Just make sure you're not bypassing any of the output filter components.
Well Motsey? Did it work? I did the exact same thing today. Medium sized bang sound. Then lights on, no sound.
Nothing looks scorched on the PCB.
Maybe if i check out the audio input to the relay, see if anything is going in.
I only just got my amp too. Doh!
Still, only £14 GBP, can buy a new one, but I'll have to wait for shipping.
Nothing looks scorched on the PCB.
Maybe if i check out the audio input to the relay, see if anything is going in.
I only just got my amp too. Doh!
Still, only £14 GBP, can buy a new one, but I'll have to wait for shipping.
I got exactly the same problem.. TWICE!!
Initially i wanted to provide it with more amps so connected the power adaptor from my Creative Inspire M4500. It was an 12V Ac power source as the rectifier is on the M4500 circuit. The Lepai gave some burning smell after which I thought I fried it.. but no damage on pcb.
But when i connected the low amp DC 12v power the blue light came up without any audio as the case with Motsey.
Later after keeping it inused for a few days it tripped back and the sound came back. But I had to keep it on for some time for the output relays to trip on. Today I connected it another dc power source with reverse polarity and gain its tripped out without any sound. I am thinking of shorting the relays on the output circuit..
Any better suggestions? ?
Initially i wanted to provide it with more amps so connected the power adaptor from my Creative Inspire M4500. It was an 12V Ac power source as the rectifier is on the M4500 circuit. The Lepai gave some burning smell after which I thought I fried it.. but no damage on pcb.
But when i connected the low amp DC 12v power the blue light came up without any audio as the case with Motsey.
Later after keeping it inused for a few days it tripped back and the sound came back. But I had to keep it on for some time for the output relays to trip on. Today I connected it another dc power source with reverse polarity and gain its tripped out without any sound. I am thinking of shorting the relays on the output circuit..
Any better suggestions? ?
- Status
- Not open for further replies.