Moving volume potentiometer off PCB on lepai-2020 - diyAudio
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Old 16th August 2014, 01:10 PM   #1
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Default Moving volume potentiometer off PCB on lepai-2020

So I bought this amp to use in a mini arcade I am building and thought it would be a brainless $20 plug and play component. it turns out I have a lot of clearance issues within my overall arcade enclosure and had to scrap my initial plan of simply cutting a hole to stick the Lepai control panel out of. I cracked it open expecting the volume potentiometer to just be free floating connected front panel and I could just extend it to have more layout options... obviously that is not the case.

I have read a ton of threads here and now simply can wait to start modding this thing (as if i need more hobbies). So total newb question here but can I desolder the potentiometer and add leads on it? This would allow me to install just volume through the wall of the arcade box (my true intention) rather than the entire unit? this would solve a myriad of space related layout issues with the other sub components. If that is the case what would be a suggested maximum length i could move this component away from the board?

It is 100% possible I am going about this the wrong way and should just be researching intercepting the line in audio and control volume there?

Any help would be appreciated.
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Old 24th August 2014, 12:34 PM   #2
PetruV is offline PetruV  Romania
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just solder wires from the pot to the original connections on the board, there is no problem with that
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Old 26th August 2014, 04:25 PM   #3
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Thanks PetruV. I cooked one lepai with i think a sloppy soldering job. Ordered another as I am now determined to make it work.

I have much to learn.
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Old 27th August 2014, 06:53 PM   #4
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I don't think there is much to permanently F up by desoldering the pot. Solder it back into place and see if it works (probably will)
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Old 27th August 2014, 07:41 PM   #5
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Quote:
Originally Posted by lutkeveld View Post
I don't think there is much to permanently F up by desoldering the pot. Solder it back into place and see if it works (probably will)
How many plumes of smoke off the board is considered acceptable?

We'll see how attempt #2 goes tonight. I am going to try with much shorter leads.
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Old 27th August 2014, 07:55 PM   #6
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I had moved the pot and both leds onto about 12 inch leads, and everything appeared to be ok except one led I think I got backwards. I powered off, switched the leads and powered back on. brief dim blip on the leds, a few snaps and pops and then a puff of smoke followed by the wife asking me if I was dead. not sure where the wrong turn was but it seemed best to start with a new board.
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Old 27th August 2014, 07:59 PM   #7
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Which component smoked?
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Old 27th August 2014, 10:44 PM   #8
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It depends where the volume control is connected in the circuit.
If its in the class d amp area then there might be problems adding long leads.

I sold a class d amp a couple of years back and the bloke emailed me saying it didn't work. I asked if he had made any changes and he had put the mosfets off the pcb on long leads to the heat sink. This had upset the class d amp and stopped it working. He put the mosfets back on the pcb and it starting working again.
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Old 28th August 2014, 02:47 AM   #9
Bare is offline Bare  Canada
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Quote:
Originally Posted by quikgeek View Post
So I bought this amp to use in a mini arcade I am building and thought it would be a brainless $20 plug and play component. it turns out I have a lot of clearance issues within my overall arcade enclosure and had to scrap my initial plan of simply cutting a hole to stick the Lepai control panel out of.
Any help would be appreciated.
Bin the excreable thing.
Buy A YJ ta2020 amp (ebay ~15$ shipped)
Less coin and while still using crap Fake parts including the TA chip, because the circuit is simpler,. ie; No Foolish /badly designed tone setup.
It sounds better and is infinitely More reliable than those Dog Doppings Lepais. Also MUCH smaller so easier to fit
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Old 29th August 2014, 05:05 PM   #10
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Second attempt went great. I was a bit shocked at how much variation there was before the first unit and the second. I followed the same procedure but with shorter leads this time. Works like a charm. Thanks for everyone's help1
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