I repaired this LED light fixture before but now it has a different problem. Patreon www.patreon.co... Mail: PO box 362, Vandalia, OH 45377 Email: johnaudiotech@gmail.com Thank You!
Good to see i am not the only one who tries to repair even stuff that is "disposable". I just like repairing stuff even if it's not worth it as long as i can get the parts for cheap or preferably free.
Sorry to be off topic but does anyone know of a method to get back into an instagram account?? I was dumb lost the account password. I would love any tricks you can give me.
@Leighton Kelvin thanks so much for your reply. I got to the site thru google and Im in the hacking process now. Takes a while so I will get back to you later when my account password hopefully is recovered.
Some suggestions on desoldering and soldering of SMT LEDs. You could scratch a small area of (white) solder mask covering the traces around the LED. Then use a soldering iron to put on some heat and solder at the exposed trace. The heat would then melt the solder underneath the LED and you can remove it very easily. To clean the old solder, just wipe with the tip of a dry cotton swab while the solder is still molten. To re-solder a good one at the same position, apply just enough fresh solder on the pads, heat the scratched area next to the pads until the solder melts. Then put the new LED on the molten solder with a tweezer. The surface tension of the molten solder will stretch the LED in position. Done ! Thanks for your attention.
hi, you can screw some aluminum channel pieces on top of the metal circle (inside or outside where ever there is space) and it will help dissipate some more heat. happy new year !
Poor dispersion is the problem with LED bulbs. I use them in globe ceiling fixtures and half the room is dark due to the directionality of them Those go back to incandescent bulbs. HAPPY 2021.
I bought one of the first ones out. Made by CREE and it's about 12 years old, and has been working everyday! This is the only LED light I've had that lasted this long. The bulbs today, burnout in a year or 2. Crappy capacitive dropper ps, or improper heat management around the socket, causes all of them to fail early. I think I paid like $23 for that bulb back in 2009. It takes a minute to reach full brightness, like a florescent bulb would! Even the glass feels like it's covered in thin silicone rubber. You'll have to pay big bucks if you want good genuine CREE bubs.
@Joachim Shekelberg Every time a healing event happens you lose some capacitance. Not such a big deal on an LED lamp, it'll just get dimmer and dimmer until it doesn't work, but on some appliances that e.g. have to power a relay it will cause very odd failure effects.
Hey John. I am pleased that I have yet again found you on RUclips. I have been looking for your channel and wondering where it went, just to learn that you started a new one. I remember all the audio stuff but also videos about the power-lines into your house and cooking "meat sauce". :)
It would help to dissipate the heat from the LEDs by putting some heatsink compound between the back of the LED strip and the case. This could also prolong their working hours.
John, Im in the process of ordering capacitors. Specifically 2.2uf, 47uf, and 3000uf for the input of the preamp, between the driver and the power section, and at the output of the speaker. I haven't used anything but Chinese parts before and my head is spinning at the variety of models available, even from a single manufacturer. I was hoping you might be able to just recommend a product line or two in those values. I'm not picky. Just want something that works well and is reasonably priced. Maybe nichicon. Thanks!
You can repair these bulbs over and over, but you can't protect them from blowing up again. If onty there was a way to make the power supply more stable to make them LED chips last longer. Too bad for us poor people that it's impossible.
Hi John I have lm 1875 sterio board of eight audio brand and it's sound quality is superb but I want to inhance it's bass without using tone control so how do I do it
Hi. John. I am somewhat new to component level trouble shooting. Is it possible to perhaps pay you a little sum of money to take a quick look at a schematic of the Harman Kardon 670 (Early 2000s model) amplifier board to confirm if the(Mute Amp) input need 5volts to mute or 5volts to un-mute?
Hi, I just saw you 12AU7 kit test & review which I looked on ebay and could find it and was wondering if you have seen the 6J1 Vacuum Electron Tube Valve Preamp Amplifier DIY kit sold in Amazon and ebay to see if it was a good "DIY usable kit"
The forward voltage of LEDs isnt exactly the same, there is a natural distribution. This means the LEDs with the lower forward voltage will hog the majority of the current if connected in parallel, burning brighter than the others and failing sooner.
Good to see i am not the only one who tries to repair even stuff that is "disposable".
I just like repairing stuff even if it's not worth it as long as i can get the parts for cheap or preferably free.
Big Clive guest appearance!
Had the same problem myself and exactly the same fix ! nice and satisfying...happy new year...cheers.
Nice repair, always satisfying when something that most would send to landfill is repaired to work some more. Thank you for sharing!
Sorry to be off topic but does anyone know of a method to get back into an instagram account??
I was dumb lost the account password. I would love any tricks you can give me.
@Ricardo Grayson Instablaster ;)
@Leighton Kelvin thanks so much for your reply. I got to the site thru google and Im in the hacking process now.
Takes a while so I will get back to you later when my account password hopefully is recovered.
@Leighton Kelvin It worked and I finally got access to my account again. Im so happy!
Thank you so much, you saved my ass!
@Ricardo Grayson glad I could help xD
Some suggestions on desoldering and soldering of SMT LEDs. You could scratch a small area of (white) solder mask covering the traces around the LED. Then use a soldering iron to put on some heat and solder at the exposed trace. The heat would then melt the solder underneath the LED and you can remove it very easily. To clean the old solder, just wipe with the tip of a dry cotton swab while the solder is still molten. To re-solder a good one at the same position, apply just enough fresh solder on the pads, heat the scratched area next to the pads until the solder melts. Then put the new LED on the molten solder with a tweezer. The surface tension of the molten solder will stretch the LED in position. Done ! Thanks for your attention.
hi, you can screw some aluminum channel pieces on top of the metal circle (inside or outside where ever there is space) and it will help dissipate some more heat.
happy new year !
Poor dispersion is the problem with LED bulbs. I use them in globe ceiling fixtures and half the room is dark due to the directionality of them Those go back to incandescent bulbs. HAPPY 2021.
Happy New Year John! Best wishes for 2021.
It wasn't that long ago, you had to open that lamp up to fix it. I think the video thumbnail is pretty much identical too. Lol
Happy new year, John.
I bought one of the first ones out. Made by CREE and it's about 12 years old, and has been working everyday!
This is the only LED light I've had that lasted this long. The bulbs today, burnout in a year or 2.
Crappy capacitive dropper ps, or improper heat management around the socket, causes all of them to fail early.
I think I paid like $23 for that bulb back in 2009. It takes a minute to reach full brightness, like a florescent bulb would!
Even the glass feels like it's covered in thin silicone rubber. You'll have to pay big bucks if you want good genuine CREE bubs.
@Joachim Shekelberg The class X caps used in droppers degrade as part of their self healing property, so also fail over time.
@Joachim Shekelberg Every time a healing event happens you lose some capacitance. Not such a big deal on an LED lamp, it'll just get dimmer and dimmer until it doesn't work, but on some appliances that e.g. have to power a relay it will cause very odd failure effects.
Hey John. I am pleased that I have yet again found you on RUclips. I have been looking for your channel and wondering where it went, just to learn that you started a new one.
I remember all the audio stuff but also videos about the power-lines into your house and cooking "meat sauce". :)
Yeah, that has been a while. I started this channel in 2012. I remember that hamburger pasta video!
@@JohnAudioTech Vegematic!
Bonus thumb up for Big Clive impression.
It would help to dissipate the heat from the LEDs by putting some heatsink compound between the back of the LED strip and the case. This could also prolong their working hours.
Well done sir. Sir how to increase bass of tda 7293 100 watt chinese amplifier board without connecting to tone control
Sir, could you please make a video on how to measure TS parameters of an audio driver with non expensives techniques. Thankyou.
It has 105 ceramic pf on its input
John, Im in the process of ordering capacitors. Specifically 2.2uf, 47uf, and 3000uf for the input of the preamp, between the driver and the power section, and at the output of the speaker. I haven't used anything but Chinese parts before and my head is spinning at the variety of models available, even from a single manufacturer. I was hoping you might be able to just recommend a product line or two in those values. I'm not picky. Just want something that works well and is reasonably priced. Maybe nichicon. Thanks!
I use Nichicon or Panasonic brands. 105C temp rating on the electrolytics. Use a film cap for the 2.2uf if it is on the input.
@@JohnAudioTech thanks!
You can repair these bulbs over and over, but you can't protect them from blowing up again. If onty there was a way to make the power supply more stable to make them LED chips last longer.
Too bad for us poor people that it's impossible.
Hi John
I have lm 1875 sterio board of eight audio brand and it's sound quality is superb but I want to inhance it's bass without using tone control so how do I do it
Hi. John. I am somewhat new to component level trouble shooting. Is it possible to perhaps pay you a little sum of money to take a quick look at a schematic of the Harman Kardon 670 (Early 2000s model) amplifier board to confirm if the(Mute Amp) input need 5volts to mute or 5volts to un-mute?
Hi, I just saw you 12AU7 kit test & review which I looked on ebay and could find it and was wondering if you have seen the 6J1 Vacuum Electron Tube Valve Preamp Amplifier DIY kit sold in Amazon and ebay to see if it was a good "DIY usable kit"
I might have to check it out if it is cheap enough.
If it's made in China it's probably due for a re-cap
Earlier this year I had to change a capacitor on the driver board of this fixture :)
I don’t understand why all the LEDs can’t just be parallel and not series.
The forward voltage of LEDs isnt exactly the same, there is a natural distribution. This means the LEDs with the lower forward voltage will hog the majority of the current if connected in parallel, burning brighter than the others and failing sooner.