PWM Alarm on Screen: How to Troubleshoot and Fix It
Step-by-step guide to diagnosing and resolving the PWM alarm on Thunder Laser machines by checking fan board and TL Timer connections.
Quick answer: The PWM alarm means the controller's power signal to the fan board (and laser tube) is interrupted. Check that the K-OK/L-ON, K-ON, and shutter connectors on the fan board and TL Timer board are fully seated.
Applies to: All Thunder Laser machines | You'll need: Access to the back of the machine (fan board) and left-side door (TL Timer)
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