The "fixed" manual is 34 pages, not 22. If your copy is shorter, you have the incomplete version.

Hold SETUP while powering on. Display shows A2 Vx.x .

: Users have reported high noise floors or distortion readings that can sometimes be traced to power supply ripple. A common "fix" involves checking the 400Hz high-pass filter; if noise drops significantly when active, it often indicates a faulty PSU capacitor.

By using this guide, you can: