Amplifier and Receiver Cleaning, Pots Cleaning, DC Bias Setting, Cracking Volume Control etc

A Little video of me cleaning one of my recent Amplifier purchases
Cleaning the dust build up inside, as is common with these top vent amps
Just one little squirt is enough, do not do to much cleaner
After cleaning the main board, I also cleaned all the metal inside casing just by brushing and hovering.
When adjusting the DC Bias, I normally have the amp running for 20 minutes or so at a medium volume with speaker connected.
Then turn volume down to zero, bass & treble at flat, balance in the middle and CD or Aux as input and speakers disconnected.
If you are unsure then be careful as you could cause more damage than good

[Daltondoubledeuce]

Cheers from across the pond. Really digging your videos, clear, concise and explained perfectly. Well done you.

[DN]

Great video. I'm working up courage to open up my au-317

[lshwadchuck]

Thanks for this. My Marantz receiver, I can see through the top grate, is DISGUSTING! I heat with an airtight woodstove, quite nearby, and I now feel like I can remove the screws, get the cover off and dust out the guts. Cleaning the contacts? Not so much. It works fine, I just think I should get the dust off the board.

[gompsie]

My old Denon reciever takes a very long time to warm up before i hear sound coming out of it, and sometimes when i change channel i hear a loud static noise do you know what this could be, the reciever is over 20 years old belonged to my uncle who recently died so i really don`t wanne dumb that awesome

[Orestis]

Hi, this is a very informative video.
I would like to ask for your help, because I 've dusted ( brush and air spray) and afterwards I ve used contact cleaning spray and it's been an hour now and not only it doesn't play but it makes weird noises ( humming and cracking) through the speakers. What has happened?

[Akstergrind]

Hey mate, like Alex below, I also bought a Rotel RA820 AX amp from eBay two weeks back, and it was great at first, but this morning it's dropping out and crackling very badly on both channels. I've tried it with a CD and it's absolutely fine, so I'm guessing it's the Phono stage that's at fault. Not really confident to crack it open, so it's going back, I'm afraid.

[georgescuovidiu]

Hello, I have the input selector from Yamaha AX870 very oxidated, is interrupting totally one channel power, so I just have sound in one speaker, if I move it left right the sound appear but dissapear, so I supose I need to clean it, what can I use to clean the boards from selector inside ?

[lavidaconkuro]

I have two passive stereo dali speakers snd a yamaha amplifier. All of the sudden, they sound mono, i pealed my speaker cables but thwy still sound mono

[tonypeppers]

hey michael, i found my rotel ra 810a is having trouble with any speaker i connect on the right side, after diagnosing with new rca to aux cords and speaker wire and different speakers, the right side will still give out and only high end comes out all fizzy. it all started when i unplugged the rca to aux from the back of the amp. i only use the Cd channel. Any suggestions before i open it up? thanks and great video !
cheers

[stevemumford]

Michael what is the name of the contact cleaner you use.
Cheers Steve

[CM-dwgh]

Hi Michael. I've realised before I do this I'm going to need the right clips, I'm presume they're smaller than average? Any details would be appreciated.

[erictiscoff]

Can you please post a video of you setting DC bios on an audio innovations alto mk1

[RicksRadioConversions]

Never use deoxit red if the potentiometer is carbon. Use the deoxit green.