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Version Comparison: Tube Troubleshooting and Replacement

Comparing: Revision 3 » Revision 4


 
 
Color Key: Addition Deletion Change
Revision 3   By Line6Andy at 4 years, 3 weeks ago Revision 4   By Line6Andy at 3 years, 7 months ago

Q: Is Biasing covered under warranty?

A: Typically not.  It should be considered as part of the routine maintenance in keeping your amplifier at its peak performance.   However, if re-biasing is required as part of other warranty service, it will be covered under the warranty policy.

 

Q: My tubes are not working (i.e. not lighting up, no output, etc).

A: Check the following:

 

  • Make sure the tube is firmly seated in the tube socket

 

Other tube situations:

  • My tubes make a popping sound accompanied by intermittent light from tubes - the tube is failing and needs to be replaced.

  • The appearance of “white frost” inside the tube – the tube has cracked and it must be replaced.

 

General Guideline for Replacing Tubes·     Always replace power amp tubes with matched set(s) every 12-24 months depending on the amount of use, and have the bias checked and/ or adjusted by an Authorized Line 6 Service Center.

 

  • Preamp tubes (such as the two 12AX7s) only need to be replaced when they are microphonic (ringing sound from tubes when tapped), noisy, or damaged.

Q: Is Biasing covered under warranty?

A: Typically not.  It should be considered as part of the routine maintenance in keeping your amplifier at its peak performance.   However, if re-biasing is required as part of other warranty service, it will be covered under the warranty policy.

 

Q: My tubes are not working (i.e. not lighting up, no output, etc).

A: Check the following:

 

  • Make sure the tube is firmly seated in the tube socket

 

Other tube situations:

  • My tubes make a popping sound accompanied by intermittent light from tubes - the tube is failing and needs to be replaced.

  • The appearance of “white frost” inside the tube – the tube has cracked and it must be replaced.

 

General Guideline for Replacing Tubes·     Always ·     Always replace power amp tubes with matched set(s) every 12-24 months depending on the amount of use, and have the bias checked and/ or adjusted by an Authorized Line 6 Service Center.

 

  • Preamp tubes (such as the two 12AX7s) only need to be replaced when they are microphonic (ringing sound from tubes when tapped), noisy, or damaged.