I get to learn so much over here. Many thanks for making these videos. Truly appreciate it. Cheers! 😊👍💐

I had a similar sort of controller issue, if this ends up being the controller. It was a Harmon Cardon and I forget the exact particulars, but with the headphone input sense and the front buttons on the same front module it was turning itself on and off. All the pull down (or ups) were good but the input voltages were funky on a few inputs with nothing connected to controller, except the pull up or down resistors, which all tested good. Ultimately it ended up being internal to the controller. But, the "fix" was to install a 5k, yes 5k resistor across the sense line for the headphone to stop that problem. With the headphone sense fully down it acted weird and with it pulled up with nothing inserted it acted weird. But 5k across and it leveled the voltage and stopped randomly turning on and off. I forget the exact particulars, but something along those lines. Ended up lasting at least 5 more years, haven't heard anything since. The more I think of it, I think the front panel buttons were an analog input with a range of voltages. The headphone was a digital input, but would effect the voltage on the analog input. Regulators were good, MCU had good voltages, grounds etc... anyway... Good luck, hopefully this one isn't another rabbit hole for you.

@norcal715

Жыл бұрын

Wow. Thank you!

Thanks for great videos.

@norcal715

Жыл бұрын

Thank you Barry!

I'm waiting for the part 2

@norcal715

Жыл бұрын

soon!

You mentioned a +6V missing, would that be the cause, or it's trigger by the processor? Just a thought. Great video as usual.

I would love to know the source of the schematics for these 80's receivers... I have a few sitting on shelves because I can't get a schematic for them...

@norcal715

Жыл бұрын

hifiengine.com and elektrotanya.com

Hello! I was watching one of your other videos and you suggested leaving a comment to let you know of a non spam email. Anyway, I think i made the subject M&k Volkswoofer. Please take a look when you can.

@norcal715

Жыл бұрын

I will. Thank you.

Check key line isn’t held down, had similar weird glitch on a denon 😄

@norcal715

Жыл бұрын

I did and you will see it on part 2

Really like your videos. I was wondering if you would be willing to repair a vintage HiFi receiver for me, paid engagement?

Hello from what site you get all the schematics

@norcal715

Жыл бұрын

hifiengine.com (stereos) vinylengine.com (turntables) elektrotanya.com (many items)

Im noticing a pulsing if the florescent display.

@norcal715

Жыл бұрын

its the camera shutter speed.