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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Another Chinese junks
The interesting thing in that article is not that these PSUs are junk, but that they are essentially repackaged used PSUs.
It seems the Chinese have found a new way to make cheap power supplies. -
Re: Another Chinese junks
I see one (Delta) with Live/Neutral leads which have been cut with new leads going to an IEC connector...My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.Comment
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Re: Another Chinese junks
oh my...Comment
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Re: Another Chinese junks
Those are the ones I already posted https://www.badcaps.net/forum/showthread.php?t=52332Less jewellery, more gold into electrotech industry!
Half of the computer problems is caused by bad contacts 
Exclusive caps, meters and more!Hardware Insights - power supply reviews and more!Comment
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Re: Another Chinese junks
All those electronics people "recycle" ...where do they go... they all come right back to us and we pay more for it...Comment
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Hi, I'm repairing this Chinese SG2701B01-7 panel. There isn't much information about it. The original part for the panel is a CSOT CS601C regulator. I can't find anything commercial on Aliexpress; there's only the CS601 without the final 'C'. They claim it's a variant. But will it be compatible? Well, my diagnosis on this screen is a video problem; the image is practically black, although there is HDMI communication. The LED light is on (backlight), but there is no VGL, no 3.3V, and no VSS. It seems that this IC is the one controlling these voltages. The monitor worked correctly for a moment and...
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Hi Folks,
Just wanted to clear up a misunderstanding of mine (or what I expect is one). Isn't the 12V rail from the 24 pin, EPS and PCIE separated? IE if I put a power resistor on the ATX 12V pin that is not going to load, thus tell me if the EPS or PCIE rails are fine?
I was recently watching ArIs from Hardware Busters video on how to properly test ATX PSUs without using 5 figure Croma substations.
The PCB adapter he used breaks out the 12, 5 and 3.3V pins from the 24 pin and gives you banana plugs to connect to. That is a bit useless is it not? Aren't... -
CDS‑200B ultrasonic cleaner - AKA James Ultra 7050 etc.
There are many versions of cheap Chinese ultrasonic cleaners, and a fair few share this design, with a removable tank with handle. There are also fixed tank versions which look to use the same basic layout and presumably the same PCBs.
I picked one up "spares or repair" on ebay, and the cleaner was dead, but the fuse wasn't blown.
A quick diode check revealed D7 was shorted. D7 is a 12V 1/2 Watt Zener. I had one in my stash, so this was about as close to a "five minute repair" as...06-23-2025, 03:22 AM -
This audio chipset has been a pain to deal with, most of the time its impossible to find drivers for chinese laptops that have no name/brand, or generic rebranded laptops.
Huawei also started to use it BUT they no longer host drivers on their website since they want you to force their PC manager app that often refuses to install after bios flashing and apparently the generic drivers around wont work on some intel systems and others wont work on amd systems, the generic ones have worked only once and i think i have had this problem on 30+ laptops so far in the last year.02-21-2025, 12:33 AM -
For anyone in need of a sample schematic for those Mini PC from chinese origin.
Enjoy.
NB690
SY8003
NB687BGQ-Z
MP86941C
MP2961 AKA MPxxx2961
NB692AGD-Z...
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