Ooooo, what a fancy video this one was! Not only do we get to see you do electrical test probing for issue, but we get to see you replace some caps. And I agree, it always is the caps isn't it? Well, you know how it is, when you get old, you can't hold your electrolytes as well, and well, you leak. Really awesome that you got a biology scientist to explain how this machine is used, loved hearing the history on those type of machines as well. I bet you the newest ones interface with an APP on your phone too. Oddly enough, this machine kept making me think of laser printers throughout the video. Great video dude, I appreciate it!
Thanks, yeah, all kinds of leaks too... ha. Oh yeah, the new ones probably require you to sign up for an account before you can do experiments. Why does a PCR machine need my contacts!?!? Yeah, laser machines generally have more mechanics in them but in general it's a big power supply in a box about the right size for the compact ones. Those might have more issues than capacitors.
I have a $50,000.00 optical coherence tomographer machine in my office that is dead. No one will service it. I don't know jack about electronics but am fixing to learn! Maybe in 6 months I'll know enough to troubleshoot and fix it, thanks to your inspiration.
I've come for adapter and cable reviews, but I learned electronics principles instead! The ASMR Voice was just an added plus, really. Glad I found your channel!
Usually you can test ESR in-circuit because when it's OK it is usually the smallest of the resistances in parallel(the rest of the circuit). Of course it depends on the circuit but for most uses of electrolityc capacitors you can get a quick good/not good without desoldering.
@@AllThingsOnePlace now there are alternatives that are not that expensive, the only limitation is that you need to discharge the capacitors before testing, there are also some specific for ESR testing that can auto-discharge capacitors without being damaged.
@@AllThingsOnePlace I'm not as up to date on the newer models(I know Hantek has one), but the DER EE DE-5000 is still pretty decent handheld LCR meter at a good price(the magic of all in one LCR IC).
That is exactly the tester I was planning on getting but then ended up getting one of the same ones that's in this video. I still have the DE-5000 in my eBay cart, I think it's still a decently accurate one for the money.
Just did a repair on this exact make/model instrument. you did a great job with this video! I bought mine for $35 just to see if I can repair it (I work in this field repairing lab equipment). The heat sink for the primary switching MOSFET gets extremely hot. And those fans for cooling the peltier elements do NOT cool the board at all. The airflow is directed above the board towards the heatsink of the reaction module. In my case, I got the unit and it wasn't powered on at all and fuses were blown. Shorted PFC MOSFET was a secondary fault. The gate driver to the MOSFET appeared to be the primary fault. I agree with you that thermal design of this instrument is its downfall. Capacitors were not the problem in my case. And each of the voltage rails including the auxiliary stand-by rail, displayed little PARD. The auxiliary power circuit does have fault protection in the form of overcurrent protection. It is that 500mA fuse next to the L/N 10A fuses. I would put the make/model of this instrument in the title of your video to make it easier to find. There's very little information out here for repairing instruments like these. Scientists like your friend AC would appreciate it. Because as you can see, the manufacturers charge a fortune to fix these. Here's the link to my video as well th-cam.com/video/cfQAosgDxIg/w-d-xo.html
Yeah, I noticed the fans for sure. Yeah, I am amazed the MOSFET's were not blown in this one. It's good the caps didn't fail, I'd still take them out and replace the smaller caps with the life time and high temperature environment. I remember getting the datasheet for that PFC controller and checking the output of it. I was surprised how hot some of the resistors get, I know they're rated for it, but with no airflow it just heats up everything around them. Thanks for the tip on the video title! I am watching your video right now.
Thank you! I need to work on making my videos flow better and the overall quality so I apologize for the length and shaky camera angles. Yours are very well done! Yea I couldn’t believe how hot some of the components on this thing were getting. Those large 500ohm resistors included. Especially the one across the 40V rail. And the heatsinks with the primary switching MOSFETs and PFC boost converter. The board does have overtemp protection and will shut itself down if it gets too hot. Well, at least if the PFC boost converter heatsink does. But IMO the primary switching MOSFET heatsink was getting wayyy hotter - no temp sensor monitoring that one. I think the fan issue at the end might not be indicative of a fault. I actually acquired another of these boards that is known to be in good working condition. And without the reaction module installed, it does the same exact thing. I was speculating that could be the case because it seemed a bit odd that all the I/Os for only one of the fans stopped working
"It's always the capacitors" 😂
I was hoping that got noticed.
Ooooo, what a fancy video this one was! Not only do we get to see you do electrical test probing for issue, but we get to see you replace some caps. And I agree, it always is the caps isn't it? Well, you know how it is, when you get old, you can't hold your electrolytes as well, and well, you leak. Really awesome that you got a biology scientist to explain how this machine is used, loved hearing the history on those type of machines as well. I bet you the newest ones interface with an APP on your phone too. Oddly enough, this machine kept making me think of laser printers throughout the video. Great video dude, I appreciate it!
Thanks, yeah, all kinds of leaks too... ha. Oh yeah, the new ones probably require you to sign up for an account before you can do experiments. Why does a PCR machine need my contacts!?!? Yeah, laser machines generally have more mechanics in them but in general it's a big power supply in a box about the right size for the compact ones. Those might have more issues than capacitors.
I have a $50,000.00 optical coherence tomographer machine in my office that is dead. No one will service it. I don't know jack about electronics but am fixing to learn! Maybe in 6 months I'll know enough to troubleshoot and fix it, thanks to your inspiration.
Nice! That is awesome, update if you have success or find it can't be repaired for some reason.
I'm rooting for you bud.
I've come for adapter and cable reviews, but I learned electronics principles instead!
The ASMR Voice was just an added plus, really.
Glad I found your channel!
Yeah, I try to throw an oddball video in once a month or so. Thanks for watching!
Usually you can test ESR in-circuit because when it's OK it is usually the smallest of the resistances in parallel(the rest of the circuit). Of course it depends on the circuit but for most uses of electrolityc capacitors you can get a quick good/not good without desoldering.
Thanks! I need to get a proper LCR meter too. That component tester was like nope.
@@AllThingsOnePlace now there are alternatives that are not that expensive, the only limitation is that you need to discharge the capacitors before testing, there are also some specific for ESR testing that can auto-discharge capacitors without being damaged.
@@Gengh13 Any suggested models/devices to check out?
@@AllThingsOnePlace I'm not as up to date on the newer models(I know Hantek has one), but the DER EE DE-5000 is still pretty decent handheld LCR meter at a good price(the magic of all in one LCR IC).
That is exactly the tester I was planning on getting but then ended up getting one of the same ones that's in this video. I still have the DE-5000 in my eBay cart, I think it's still a decently accurate one for the money.
Just did a repair on this exact make/model instrument. you did a great job with this video! I bought mine for $35 just to see if I can repair it (I work in this field repairing lab equipment). The heat sink for the primary switching MOSFET gets extremely hot. And those fans for cooling the peltier elements do NOT cool the board at all. The airflow is directed above the board towards the heatsink of the reaction module. In my case, I got the unit and it wasn't powered on at all and fuses were blown. Shorted PFC MOSFET was a secondary fault. The gate driver to the MOSFET appeared to be the primary fault. I agree with you that thermal design of this instrument is its downfall. Capacitors were not the problem in my case. And each of the voltage rails including the auxiliary stand-by rail, displayed little PARD. The auxiliary power circuit does have fault protection in the form of overcurrent protection. It is that 500mA fuse next to the L/N 10A fuses. I would put the make/model of this instrument in the title of your video to make it easier to find. There's very little information out here for repairing instruments like these. Scientists like your friend AC would appreciate it. Because as you can see, the manufacturers charge a fortune to fix these. Here's the link to my video as well th-cam.com/video/cfQAosgDxIg/w-d-xo.html
Yeah, I noticed the fans for sure. Yeah, I am amazed the MOSFET's were not blown in this one. It's good the caps didn't fail, I'd still take them out and replace the smaller caps with the life time and high temperature environment. I remember getting the datasheet for that PFC controller and checking the output of it. I was surprised how hot some of the resistors get, I know they're rated for it, but with no airflow it just heats up everything around them.
Thanks for the tip on the video title! I am watching your video right now.
Thank you! I need to work on making my videos flow better and the overall quality so I apologize for the length and shaky camera angles. Yours are very well done!
Yea I couldn’t believe how hot some of the components on this thing were getting. Those large 500ohm resistors included. Especially the one across the 40V rail. And the heatsinks with the primary switching MOSFETs and PFC boost converter. The board does have overtemp protection and will shut itself down if it gets too hot. Well, at least if the PFC boost converter heatsink does. But IMO the primary switching MOSFET heatsink was getting wayyy hotter - no temp sensor monitoring that one.
I think the fan issue at the end might not be indicative of a fault. I actually acquired another of these boards that is known to be in good working condition. And without the reaction module installed, it does the same exact thing. I was speculating that could be the case because it seemed a bit odd that all the I/Os for only one of the fans stopped working
You are very insightful and knowledgeable
This was a fun video to make.
I'm glad "AC" wasn't presenting to the emergency room!
hahaha. I thought it was a good twist, a positive spin instead.
i enjoyed this
Thanks! Something a little different than reviews.