Guys/Gals,
I have one of these...10 Port Chargers...The name is not on the top of the unit but the board Silk Screening says otherwise.
http://www.wanlongxin1.com/index.php...&product_id=42
Long story but it was sent to me DOA. Told me to keep it and refunded my money.
I have had it on the shelf to troubleshoot for quite some time and decided to get an order together to Mouser/Digikey/Arrow for a few other projects and thought now would be a good time to troubleshoot.
Anyways I have never troubleshooted a USB Charger...do not see a ground mentioned on the board...Its sloppy/dirty on the back...
I have included three pics and there is a number on the board.
WLX-838 Pcb:2017-03-22F Rev 2.0.
I tested the switch, fuse, the small transformer, and the bridge rectifier. They tested as they should. At least to my novice eyes.
I am going to get my ESR meter/meter and check the caps but I decided to test for shorts/opens in the large transformer next. (ESR across the room). I have included the back (image) test points and there is continuity in the gray squares but the red square no continuity (open)...Is this a Bad Tranformer/Inverter and if so how do I identify a replacement?
Anyone have a schematic?
Thanks again everyone.
Chris
I have one of these...10 Port Chargers...The name is not on the top of the unit but the board Silk Screening says otherwise.
http://www.wanlongxin1.com/index.php...&product_id=42
Long story but it was sent to me DOA. Told me to keep it and refunded my money.
I have had it on the shelf to troubleshoot for quite some time and decided to get an order together to Mouser/Digikey/Arrow for a few other projects and thought now would be a good time to troubleshoot.
Anyways I have never troubleshooted a USB Charger...do not see a ground mentioned on the board...Its sloppy/dirty on the back...
I have included three pics and there is a number on the board.
WLX-838 Pcb:2017-03-22F Rev 2.0.
I tested the switch, fuse, the small transformer, and the bridge rectifier. They tested as they should. At least to my novice eyes.
I am going to get my ESR meter/meter and check the caps but I decided to test for shorts/opens in the large transformer next. (ESR across the room). I have included the back (image) test points and there is continuity in the gray squares but the red square no continuity (open)...Is this a Bad Tranformer/Inverter and if so how do I identify a replacement?
Anyone have a schematic?
Thanks again everyone.
Chris
Comment