AMPEG Micro VR head_ No sound after removing its cooler

You'd have been better off disconnecting the fan itself instead of its switch. Doesn't it just attach to the PC board with a molex plug? I have one but the fan noise never bothers me so I never checked it out, but I thought that's usually how they do it.

 

Another perfectly good amp damaged by an ill-advised modification?

Sounds like the amp needs to see a qualified service technician.

 

Why oh why do folks without any electronics training try to ‘Improve’ their amplifier that is working perfectly? If the amp has a fan don’t you think that perhaps, just perhaps it’s there for a reason? Any warranty that you had is now void so the repair will come right out of your pocket!

 

The headphone out is before the power amp. Since that is working, it appears that the problem is in the next stage which is the power amp.

Look for any obvious signs of damage and show that to your tech. Unfortunately, there isn’t a simple solution.

 

Unplugging the fan is modifying the amp. The manufacturer put a fan in there for a reason, perhaps you discovered that very reason?

Some fan circuits detect the fan load and/or RPM and will not operate with the fan disconnected, a form of protection against what might happen in the field.

 

Poor idea. You never know what it a “must have” part for an electronic device unless you designed it. I guess now you know the fan is important.

I had a Fender Frontman 100 guitar amp a few years back that I’d decided to change the power indicator LED on. Well, turns out on a Frontman 100 the damn power LED indicator is a vital part for signal flow, put in the new LED and there was nothing but dead silence. Put the old one back in and I got lucky; it worked.

You don’t know what you don’t know, but you can rule out courses of action based on not knowing certain things. I don’t work on cars because I don’t understand how they work. At all. I’ve refinished a couple, because paint is something I understand, but I’m not going to replace a water pump because I have no idea of what it looks like and a minimal idea of what it does. Similarly, I wouldn’t go yanking a fan out on an electronic device because, aside from “keeping something cool” I don’t know what it does.

 

Believe me, wherever you are in the world, if you walk into an Authorized Ampeg Service shop (and this is a business authorized by Ampeg and/or your distributor to do warranty work in your country), and tell them what you did, unless they are being very charitable in what they will cover, you have, indeed, 'modified your amp' and it won't be repaired under warranty.

I'm sorry this went wrong for you, but I can think of no manufacturer of most any product that will cover something that was working as intended . . . . . until you 'fixed' it and the product failed.

 

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