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The knobs and switches keep cutting out

I have a Kenwood Model 600 it is a old amp and sounds great except that the knobs and switches keep cutting out, is it safe to use a spray cleaner? which one should I use?

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You can use contact cleaner formulated for electronic appliances you can find it on local electronic parts dealer

Posted on Feb 04, 2010


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Either chanell cuts out randomly. It is not over heating, and does'nt happen all the time. Otherwise sounds great. Marantz 2230. thanks in advance. Steve

Intermittent problems are no fun to troubleshoot because you have to force it to fail or wait for it to show the problem. It sounds like it could be a thermal problem or a cold solder connection. Do you hear the sound through the headphone jack on the receiver when the speakers blank out? If so your pre amp section is working, and it is in the power amp section. If not I would first use a spray contact cleaner on the switches and rheostats. Click on the link below for Cleaner.
Second, wait until the unit exhibits the problem then use a freeze spray selectively spraying parts of the board and components until the sound returns. You can use a heat gun sparingly to heat parts of the circuit to try to force it to fail. If you selectively freeze spray the board and sound returns you need to inspect the board for broken traces and touch up solder connections, which could be cold and faulty. If you spray a component and the sound is restored it could be a bad component, and it should be inspected. Click on the link below for freeze spray.

Jul 21, 2010 | Marantz 2230

1 Answer

Volume cuts out, volume knob overloads when touched

If this is the old style potentiometer unplug amp and remove cover to get to volume control. spray contact cleaner made for that purpose at the radio shack stores or similar. Spray it into the control and turn the control back and forth to work it in. Let stand for a few minutes and try it again. Always make sure it is dry on all components first.

Jun 07, 2010 | Pioneer Audio Players & Recorders

2 Answers

Get a lot of static when try and turn volume down fact, sometimes it is hard to get sound when you turn the volume is either full blast or silent.....lots of static like noise when...

This is an easy fix with a can of volume knob cleaner i think its called. You should be able to get it at radio shack. You just spray it into the volume knob and let it dry. The instructions are on the can.

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Wont stay started

well it sound like vacuum leak to me take some carb cleaner or brake cleaner and spray around throttle body see if bike rev up or cuts off hope this helps

Aug 26, 2009 | 1994 Suzuki GSX 600 F (Katana)

1 Answer

Sound problem

Try cleaning the volume control with an electronics switch cleaner spray. If that does not resolve the problem and it seems to happen at low volumes more than load volumes, then the output relay needs to be replaced. Keep us posted. Dan

Jun 12, 2009 | Kenwood Audio Players & Recorders

2 Answers

My 00 suzuki gsxr 600cc keeps cutting out while im driving it.

Hi there!

You can adjust the idle knob on the carburetor to at least 1,100 rpm. If it still knocks out, you need to clean the carbs. Clean the jets using compressed air and put it all back. Clean your spark plugs or better, replace them if they're already old. This will not only make a cleaner burn but ensure maximized horsepower.

Hope this helps

Apr 01, 2009 | 2000 Suzuki GSX-R 600

1 Answer

My uncle just gave my son a g-100 amp. it is a old tube amp made by yamaha . it has a lot of scratchy niose. the amp works. someone said it might need to be cleaned. do you think that will work?. if so...

The g-100 is a solid state amp produced by Yamaha in the late 1970s.  If the "scratchy noise" is produced when turning the knobs, it can be cleaned by using a spray called "de-ox it" or an electronic contact cleaner and lubricant like CRC-56.  The best way to clean old rotary potentiometers (the electronic part of the knobs) is a good hard turning.  Moving the knob back and forth with firm gentle pressure can actually clean off residue and result in a cleaner tone.  Try to apply the cleaning spray to the knob stem only and to no other surfaces.  Another great electronics cleaner/spray is Contact ReNu made by MillerStephenson. If the problem persists you might want to take this amp to a pro repair guy. Good Luck! 

Jan 06, 2009 | Audio Players & Recorders

1 Answer

Audio Receiver Video selector problem

Hi jmiglio48

Most high end Yamaha s used Alps devices for switching and attenuation. The problem you face is probably caused by a noisy switch contact. They are a little hard to get into to contact clean, I have managed to spray the internals of this type of switch before by using a pin vice with a 1mm drill to bore small holes into each bank to get access to the switch contacts and then spray internals with contact cleaner/lubricant. As the switch is hermetically sealed, they are considered to be more a replaceable part. I suggest you do an inquiry with a Yamaha service agent in your locality to see if a new switch assembly can be sourced. I have replaced one here in Australia before(cost about $120 for the part), but current availability will depend on where you are located. If you need a hand to track one down, get back to me in here. Hope this helps you anyways. Good luck, a FixYa rating for this info will help my profile. Cheers


Mar 07, 2008 | Audio Players & Recorders

1 Answer


If the volume control does nothing them spraying it will do nothing. If it is noisy when you turn it but the volume does change them you can try to spray it with cleaner. You cannot do this from the front; only from the inside and only if the volume control is not sealed.

Aug 28, 2007 | Kenwood VR-407 Receiver

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