I’m here repairing a Harman Kardon ADP 303, which is an AC-3 RF decoder.

What is the difference between an AC-3 decoder and an AC-3 RF decoder? Why would we ever need to use this ADP 303 when most surround receivers already have AC-3 (Dolby Digital) decoding built in?
The answer to Continue reading Harman Kardon ADP 303 repair →

I made a video a while back about a Yamaha surround receiver that I was troubleshooting. I decided to make that video into a little troubleshooting riddle rather than showing you directly what the problem was. The reason for this is that you learn a lot more when getting involved Continue reading Yamaha RX-V620RDS repair part 2 →

In this video, I explain one of the major reasons to why I have been absent from YouTube for a longer period of time.
I was still shooting some new videos during this time, however, I could not edit them properly due to the problems explained in this video. This means Continue reading Encoding errors →

This time we´re looking at a 5.1 surround receiver from Yamaha that has a fault on the center channel.
I was initially planning on making another regular repair video out of this, but towards the end I started to realize that this could actually serve as a very interesting troubleshooting exercise.
Test Continue reading Yamaha RX-V620RDS surround receiver – Repair & troubleshooting exercise →

Anyone got any idea of what might be causing this to happen? I have seen this happening on a few other scopes on YouTube, but it appears to me that most scopes are not doing this. Does your analog oscilloscope show the same kind of behavior? It would be great Continue reading What is causing this on my analog oscilloscope? →

When ordering electronic components on eBay from random eBay sellers, how many of those components will be delivered in proper ESD safe packaging?
You would expect retailers of electronic components to be serious enough to know what they are doing, thereby handling and packaging their electronic components properly according to ANSI Continue reading Do eBay sellers care about ESD safety? →

This is a documented repair of my Tektronix 2235 analog oscilloscope. The scope had an intermittent problem with the horizontal sweep which I had to take a look at since I’m using this analog scope quite often during the repair of other hardware.

I have the schematics for this scope available Continue reading Tektronix 2235 oscilloscope repair – Horizontal sweep issue →

This is a very interesting and useful way of spotting bad capacitors and other potential problems on a PCB.
It won’t work on every PCB out there, but it will work on a great number of them. One big advantage with this method is that it is really cheap; all you Continue reading PCB UV inspection – Find bad capacitors and other problems on a PCB →

This is a demonstration of a PCB repair which involves repairing damaged surface mount solder pads as well as cleaning up corrosion from a leaking electrolytic capacitor. The pads had been damaged by the owner of the motherboard as a result of him trying to repair the board on his Continue reading PCB solder pad repair & corrosion clean up – The epoxy method →

Like all other Amiga models, the Amiga 1200 has a low-pass filter in hardware which can be found directly on the motherboard. This audio filter can be turned on and off in software. In case of the audio filter being stuck in either the ON or OFF state, how would Continue reading A1200 Audio Filter ON/OFF Switching – Troubleshooting guide →