Jump to content
Sign in to follow this  

Tube Troubleshooting and Replacement

  • https://line6.com/media/ips/uploads/

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.

Sign in to follow this  

User Feedback

Recommended Comments

There are no comments to display.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now