(WP-4540/4530/4520/4510 series only) 13 1.3.1 Basic Specifications 13 1.4 Control Panel 14 1.4.1 Operation Buttons LEDs 14 1.4.2 LEDs and LCD Indications 17 1.5 Various Settings 22 1.5.1 Panel Operation 22 Setup Menu Configuration (WP-4540/4530/4520/4510 series only) 22 Panel Operation ...