Voltlog #99 – Samsung TV Power Supply Board Repair MK32P5T BN44-00213A

In this video I am repairing a power supply board from a Samsung TV. The part number for the power supply board is MK32P5T (BN44-00213A). The TV was showing the stand-by led but refused to turn on. It turns out this was a common problem with a simple fix.

Here are links to some of the tools used in this video:

Voltlog #92 – InTheMail

Welcome to another Voltlog, today we’ll be taking a look at what I’ve been receiving in the mail recently. As much as you guys like watching this stuff, I also like getting all these electronic modules from China. I find it interesting every time I get my hands on a new circuit.

As always I appreciate feedback and discussions in the comments section below, please let me know what you think and don’t forget to like the video, that is always a clear indication of what kind of content you guys like seeing.

Here are links to all the items shown in this video:

Voltlog #91 – Nokia IP330 Firewall Teardown

Today we are taking a look at this old network equipment, it’s a Nokia IP330 Firewall. This router / firewall was released probably in 2000 or something similar, I couldn’t find any exact info on the release date but we can safely assume it’s at least 15 years old

Don’t forget to like & comment, that helps the channel grow.

 

Voltlog #72 – DIY AC-DC Off-Line Converter With TNY276/TNY277

This is the first AC-DC power supply that I’m designing and building. Everything seems to work up to a point where the chip (TNY 276 from Power Integration) gets too hot and enters thermal protection. This is where I’m asking my viewers help to jump in with suggestions on what might be wrong.

This is part 2 where I get the circuit working by switching from the TNY276 to the TNY277 which has a higher power rating and is probably the proper IC to use with this transformer (EE1616 ER2741)

And this is part 3 of the video where I finally find the real fault in the circuit. It turns out I was right, this circuit should have worked with the TNY276 as well and it wasn’t the higher power rating of the TNY277 that fixed the issue.

Voltlog #69 – LM317 Kit Assembly Fail

Sometimes, when I have some spare time I like assembling these cheap kits coming from China. Today I am assembling an LM317 adjustable power supply kit complete with voltmeter. Unfortunately they sent me a wrong resistor value so the kit didn’t work as expected but I was able to fix it in the end.

Voltlog #64 – DIY Adjustable Power Supply With Enclosure

Today I’m going to be building a complete DIY analog bench power supply. The actual analog power supply kit (0-30V 0-3A) that I’m going to be using, is this one, it was shown and assembled in voltlog #8. Besides that I’m going to be using this plastic enclosure which I think is quite nice and perfect for such a project, this one can also be found on banggood and there will be links in the description for all the items used in this build.

Voltlog #50 – InTheMail

A new InTheMail video because mail items have been constantly coming in. I hope you’ll find it interesting and if that’s the case, hit that like button so I know you like this kind of video.

Here is a list of items shown in this video:

  • DC-DC Adjustable Step-Down Module with LCD
  • OLED Panel Meter 0-33V 0-3A
  • PWM DC Motor Speed Control
  • BQ24650 MPPT Solar Panel Lithium Lead Acid Battery Charge Controller 5A
  • Battery BMS Protection Board For 3S 18650 Lithium Battery
  • Battery BMS Protection Board For 3-4S 18650 Lithium Battery
  • Mini DC-DC converter Module
  • RS232 Bluetooth Serial Adapter
  • HC-05 Bluetooth Module
  • MP3 Format U Disk TF Card decoder board module amplifier player
  • Digispark Attiny85 Micro USB Development Board
  • RFID T5577 125KHz EM4100 ID Card Copier Duplicator
  • HC-SR505 Mini Infrared PIR Motion Sensor
  • NCP1203D60 PWM Controller IC
  • Energy Meter Electricity Monitor

You can find links for all of these items in the video description.

Voltlog #48 – New 2016 Gopher CPS-3205C Review & Teardown

This is the new 2016 revision of the Gopher CPS-3205C. Gopher has addressed some of the issues I found in the old revision and sent me their latest for review. You will see a teardown as well as various tests performed on this power supply.