HP Color LaserJet MFP M577, MFP M578, MFP E57540 - Removal and replacement: Keyboard (M577/M578/E57540 flow models)

Follow these steps to remove the control-panel cover (MFP).

1. Open the document feeder (callout 1).

   Note:

   If the control panel is not fully tilted forward, tilt it forward now until it stops (callout 2).

   Open the document feeder

   

2. Beginning at the right side of the control-panel cover, carefully release five tabs along the top edge of the cover.

   Note:

   The thin, black plastic cover will separate from the white plastic control-panel base.

   Release five tabs

   

3. Continue to lift the top edge of the cover away from the printer, and then remove the cover.

   Remove the cover

   

Follow these steps to remove the keyboard.

1. Open the latch (callout 1) to release the keyboard flat cable.

   CAUTION:

   The latch must be opened to release the cable.

   Disconnect the keyboard flat cable

   

2. Slide the keyboard tray out until it stops.

   Slide the keyboard out

   

3. Push up on the keyboard tray to release two tabs on the bottom of the tray, and then slide the tray toward the front of the printer to disengage the tabs.

   Release two tabs

   

4. Slide the keyboard (callout 1) all of the way out of the printer to remove it.

   Remove the keyboard

   

Follow these steps to unpack the replacement assembly.

1. Dispose of the defective part.

   Note:

   HP recommends responsible disposal of the defective part.

   http://www8.hp.com/us/en/hp-information/environment/product-recycling.html

2. Unpack the replacement part from the packaging.

   CAUTION:

   Some parts are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation or mat. If an ESD workstation or mat is not available, touch the sheet-metal chassis to provide a static ground before touching an ESD-sensitive assembly. Protect the ESD-sensitive assemblies by placing them in ESD pouches when they are out of the printer.

   Important:

   Make sure that all of the shipping materials (for example shipping tape) are removed from the replacement part prior to installation.

   Note:

   If the replacement part is a roller or pad, avoid touching the spongy part of it. Skin oils on the roller or pad can cause paper pickup and/or print-quality problems. HP recommends using disposable gloves when handling rollers or pads or washing your hands before touching rollers or pads.

3. To install an assembly, reverse the removal steps.

   Note:

   When applicable, special installation instructions are provided for an assembly at the end of the removal procedure. Always completely read the removal instructions and follow all special installation instructions.

Follow these steps to install the keyboard.

1. Position the flat cable (callout 1) on the keyboard into the keyboard slot (callout 2).

   Install the flat cable through the slot

   

2. Slide the keyboard tray into the slot.

   Note:

   Only slide the tray halfway into the opening. This makes connecting the cable in the next step easier.

   Slide the keyboard into the slot

   

3. If the flat cable (callout 1) is not in the opening (callout 2) in the control panel base, carefully reach in and thread the flat cable through the opening.

   Check the flat cable

   

4. Position the keyboard flat cable in the connector, and then close the connector latch.

   Important:

   Slightly tug on the cable to make sure that it is fully captured in the connector.

   Note:

   When the connector latch is closed and the cable is correctly installed, the white line on the cable is parallel to the connector latch.

   Install the keyboard

   

Follow these steps to install the control-panel cover (MFP).

1. Position the control-panel cover on the printer.

   Install the cover

   

2. Beginning at the left side of the control-panel cover, carefully push down along the top edge of the cover to engage five tabs.

   Engage five tabs

   

3. Close the document feeder.

   Note:

   Adjust the control panel to the desired angle.

   Close the document feeder