|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: cleaning speaker selector switch on NAD 7100 posted by rrlean on May 1, 2003 at 11:30:40:
... as long as the switch contacts are reasonably accessible inside the amp (which is not always the case). Read through my amateurish description and decide if you're comfortable. If not, take it to a pro. He/she WILL charge you a "dummy fee" if you try the job yourself and you screw something up... my father was a TV repairman; I know whereof I speak :-)The basic procedure is this: Disconnect the amp from power and wait a while for caps to discharge (if it's recently been used). Remove the amp cover and locate the offending switch/control. Spray the contact surfaces of the switch (I am assuming it's a wafer-type rotary selector?) with a good quality contact cleaner (e.g., Caig Deoxit... there are many others down to and including tuner cleaner from Radio Shack) and work the switch back and forth through its travel a few times. The cleaner can will come with a "nozzle" to direct the spray. I would recommend repeating the spray and switch routine once more and then let the more-or-less volatile cleaner evaporate before putting things back together. IMO a couple of conservative sprays are better than really drenching the component in question. If the internal construction of the amp isn't too complicated (i.e., not too many other little components in the vicinity to break off), you might want to blot or wipe up overspray. Reassemble and test... if it's still noisy or intermittent, disassemble and repeat. If you continue to have trouble, it might be time to call on the services of a professional anyway.
Special note: contact cleaners work great on switches and pots. Some are just a solvent (e.g., isopropanol) but many (most?) also contain a lubricant. Resist the temptation to spray contact cleaner into open plate capacitors (i.e.., tuning capacitors in an AM or FM tuner)... it's not a good idea.
Hope this helps. No warranty expressed or implied. Not responsible for death or dismemberment (yours or the amps)... etc., etc.
all the best,
mrh
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- you can probably do it yourself... - mrh (Mark Hardy) 12:21:28 05/01/03 (2)
- Re: you can probably do it yourself... - rrlean 12:33:55 05/01/03 (1)
- pretty much same deal for a pushbutton sw... - mrh (Mark Hardy) 17:07:43 05/01/03 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
