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 Post subject: buzzing noise
PostPosted: Jun Fri 22, 2018 3:16 am 
New Member

Joined: May Tue 15, 2018 5:26 am
Posts: 19
Location: Converse, TX, United States
i have a marantz model ta-70 stereo system component . maybe someone can point me in the right direction or the circuit to check. i get a buzzing noise in the speakers and headphones i got it used i cleaned it the best i could i hope someone can help me . if you need more information please let me know .the noise is all the time . you can't even hear music if you raise the volume the noise get louder

Last edited by jerry1988 on Jun Fri 22, 2018 4:05 am, edited 1 time in total.

 Post subject: Re: buzzing noise
PostPosted: Jun Fri 22, 2018 3:56 am 

Joined: Sep Thu 23, 2010 6:37 am
Posts: 12437
Location: Powell River BC Canada
Noise should be described in terms of function, setting of controls,
and when it occurs.

Amateur Radio Literacy Club. May we help you read better.
Steve Dow

 Post subject: Re: buzzing noise
PostPosted: Jun Fri 22, 2018 12:08 pm 

Joined: Jan Thu 01, 1970 1:00 am
Posts: 18175
Location: Utica, NY 13502 (USA)
Is this what your TA-70 looks like?

File comment: The TA-70 is an ST-70 tuner and PM-70 amp combined into one chassis although look like separate components.
Marantz TA-70.jpg
Marantz TA-70.jpg [ 164.57 KiB | Viewed 1198 times ]


 Post subject: Re: buzzing noise
PostPosted: Jun Fri 22, 2018 7:04 pm 
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Joined: Dec Sat 24, 2011 9:17 pm
Posts: 7155
Location: Vancouver Island, Canada
Buzzing gets louder with the volume control - noise is picked up in the front end, radio or inputs.

Are you using the radio tuner or plugging in an external sound source, phono or tape?
If radio, unplug all wall warts, phone chargers, printers, laptops, etc. Also turn off LED lights in the room. If that does not affect the buzz, try the stereo in a different room, different outlets. You are checking to see if the noise is external, easy fix in most cases.

See if the noise changes with different sound sources. That might indicate an internal fault, maybe why it was for sale. :(

Watch the doughnut, not the hole.
Burl Ives, RIP, oldtimer.

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