Author Topic: Hi-fi volume knob  (Read 934 times)

Offline Chandler

  • Universal Moderator
  • xTreme Poaster
  • *****
  • Posts: 4069
    • Quantex Zone
Hi-fi volume knob
« on: Apr 01, 2009, 07:37 AM »
Has anybody ever seen this before?

My hi-fi system is about 9 years old.  The CD player section died about 6 years ago but the amplifier still works fine.

The volume knob is digital and doesn't have a "start" and "end" position - it can just turn indefinitely.  Recently I've noticed that it has become slightly erratic.  I will turn it up just a couple of notches (say to a volume of 10) and go away to empty the dishwasher; come back to it five minutes later and it's crept up to maximum volume.  It happens the other way; it will gradually work its way down to zero.

Maybe it's a sign to finally replace it with something a bit more modern (Dolby Digital and DTS versus Dolby Pro-Logic) but in terms of sound output it still works great and I'd like to fix this problem if possible.  I can't use the remote control because the remote sensor is unbelievably useless on this model, even with my Logitech Harmony remote blasting out a high IR beam.

Offline scuzzy

  • Forum Cop
  • Administrator
  • xTreme Poaster
  • *****
  • Posts: 4584
  • Caveat Empty: Beware of jesters
Re: Hi-fi volume knob
« Reply #1 on: Apr 01, 2009, 12:24 PM »
It's probably caused by carbon buildup across the switch contact area.

If you are able to take it apart, you can try cleaning it with WD-40 as you vigorously turn the knob back and forth. If you are unable to do that, then vigorously work the knob back and forth anyway for as long as you can tolerate doing it. That will clean off some of the carbon and should resolve the problem - at least temporarily.
Antec Performance TX640B Case | WinXP Pro SP3 & Win7 64-bit | Gigabyte GA-EP45-UD3R | Intel Core 2 Duo E8500 Wolfdale LGA 775 3.16GHz Dual-Core | 8GB (4x2GB) PC6400 G-Skill RAM | eVGA 7600GT 256MB PCI-E | 74GB WD Raptor SATA 16MB Cache | 74GB WD Raptor SATA 8MB Cache | 320GB Seagate Barracuda SATA 16MB Cache | External 640GB WD Caviar SATA 32MB Cache | Sony DRU-V200S DVD/RW | PC Power & Cooling Silencer 500W | Samsung SyncMaster 2494 (24") LCD Monitor | LG Flatron W2361V (23") LCD Monitor

Offline scuzzy

  • Forum Cop
  • Administrator
  • xTreme Poaster
  • *****
  • Posts: 4584
  • Caveat Empty: Beware of jesters
Re: Hi-fi volume knob
« Reply #2 on: Apr 01, 2009, 01:23 PM »
I learned to use WD-40 as a communications officer in the Army. It worked great and has never caused a problem for me.

However, JA is right - it is petroleum based. So a specialized product is probably best.
Antec Performance TX640B Case | WinXP Pro SP3 & Win7 64-bit | Gigabyte GA-EP45-UD3R | Intel Core 2 Duo E8500 Wolfdale LGA 775 3.16GHz Dual-Core | 8GB (4x2GB) PC6400 G-Skill RAM | eVGA 7600GT 256MB PCI-E | 74GB WD Raptor SATA 16MB Cache | 74GB WD Raptor SATA 8MB Cache | 320GB Seagate Barracuda SATA 16MB Cache | External 640GB WD Caviar SATA 32MB Cache | Sony DRU-V200S DVD/RW | PC Power & Cooling Silencer 500W | Samsung SyncMaster 2494 (24") LCD Monitor | LG Flatron W2361V (23") LCD Monitor