INF-35SECTION 1 SERVICE INFORMATION < RZ31K/RS30K>4. 4. Security password4.4.1. Control device passwordTake the procedure below to restore the factory default password (AAAA).1. Press the [AUTO SETUP] button on the remote control or on the control panel of projector for more than 2 seconds whilethe control device password input request menu is displayed on the screen.2. Press the [▼] button for more than 2 seconds.The password will be initialized.4.4.2. Initial security passwordInitial password : Press [p u q t p u q t] button sequentially and press [ENTER] button.If the initial password has been changed, ask user to have it.Chapter 6 Maintenance — Maintenance/replacement202 - ENGLISHResetting the filter counter1) Turn on the power of the projector.2) Press the f The [MAIN MENU] screen is displayed.3) Press as to select [PROJECTOR SETUP].4) Press the button.f The [PROJECTOR SETUP] screen is displayed.5) Press as to select [FILTER SETTING].6) Press the button.f The [FILTER SETTING] screen is displayed.7) Press as to select [FILTER COUNTER RESET], and press the button.8) When the confirmation screen is displayed, press qw to select [OK], and press the button.f The [PROJECTOR SETUP] menu → [STATUS] → [FILTER COUNTER] is displayed as “0”.Notef When the projector is used without resetting the filter counter, the actual filter runtime (counter numeric value) will not be able to beconfirmed.Replacing the unitFilterIf dirt does not come off even after the air filter unit is maintained, it is time for the unit to be replaced.The Replacement Filter Unit (Model No.: ET-EMF330) is an optional accessory. To purchase the product, consultyour dealer.Attentionf Make sure to turn off the power before replacing the filter. (x pages 58, 68)f Make sure that the projector is stable, and perform the maintenance in a safe place even if the filter falls accidentally.Notef The replacement cycle of the air filter unit varies greatly depending on the usage environment.For the air filter unitThe section describes the replacement procedure of the standard air filter unit attached to the projector.This air filter unit is the same as the Replacement Filter Unit (Model No.: ET-EMF330) (accessory/optionalaccessory).1) Remove the air filter unit.f Refer to “Removing the air filter unit” (x page 197) of the standard air filter unit.2) Attach the Replacement Filter Unit (Model No.: ET-EMF330) (accessory/optional accessory) to theprojector.f Refer to “Attaching the air filter unit” (x page 198) of the standard air filter unit.3) Reset the filter counter.f Refer to “Resetting the filter counter” (x page 199) of the standard air filter unit.Attentionf When switching on the projector, make sure that the air filter unit is attached. If it is not attached, the projector will suck in dirt and dustcausing a malfunction.f When the projector is used without the air filter unit attached, the filter indicator lights up in red.f When the projector is used without resetting the filter counter, the actual filter runtime (counter numeric value) will not be able to beconfirmed.