L7580 is a great multifunction printer from HP. Here we will discover what’s inside the printer and remove its sensors and DC motors.

Project Steps

Removing the automatic document feeder.

Remove the three T8 Torx screws from the paper feeder.

Lift the white surface to reveal the two notches.

Push the notches to detach the paper feeder mechanism.

After removing the paper feeder, you will notice the slotted opto switch.

Remove the back cover to demount cable jacks.

Pull and detach the paper feeder mechanism.

Remove the T8 Torx screws from the right cover.

You will see the feeder’s mechanics after removing the cover.

Remove the top cover, and here is the first DC motor and its encoder.

Removing the top cover

Pull the scanner cover up to detach it from the main body. Then, remove the T8 Torx screws around the scanner window.

Remove the control panel by pulling it.

Finally, remove the inner layer of the control panel by forcing the notches.

Remove the flat cable from the control panel.

Remove the T8 Torx screws to see what’s inside the control panel.

Then, we will see the 4 layers of the control panel.

The scanner mechanism

Remove the two T8 screws to detach the scanner cover.

Lift the cover up to reveal the scanner mechanism.

And we have our second DC motor and encoder. Plus, a carrier mechanism.

Scanning head and sensor

Remove the scan head’s top cover by pressing the two notches on the back.

Remove the T8 screws of the circuit board.

Here is the scanner sensor and the objective.

Remove all the screws from the back, including the ones inside the 3 covers.

Remove the two screws from the top of the cartridge-change cover.

Detach the two side covers by pulling them.

Detaching the scanner section

Detach the back cover.

Remove the 4 screws from the both hinges.

The hinges can pop up suddenly, so be careful.

Then, remove the scanner cover to reveal the printing mechanism.

Remove the screws on the cover.

You will notice the speaker below the cover.

Remove the screws holding the cartridge door. There is another slotted opto switch here.

There is an extra weight block on the print mechanism to prevent vibration.

Remove the red marked screw to detach the ink hose.

Remove the green marked screw to detach the ink cartridge slot.

Finally, we have the ink hose and the nozzles.

The mainboard

Remove the screws to detach the mainboard of the printer.

The board has a power input, an Ethernet connector, a USB device port, phone line input and outputs, memory card slots, a USB host port, various internal connectors and a CR2032 RTC battery.

Remove the screws holding the print head’s motor.

And we have a DC motor here.

Rotate the printer right to reach the other DC motor.

Remove the two screws connecting the motor to the body.

We will have another DC Motor.

Remove the screw to get the slotted opto switches.

The L7580 has a lot of DC motors inside. Detach the ink cartridge slots by removing the screws to discover another DC motor.

Ink cartridge mechanism

This is the ink cartridge pumping mechanism. The last DC motor we detached controls this mechanism.

The opto switch reports the mechanism’s position.

Communication between the board and cartridges is being established by serial data line as I guess.

Master print head

Then, we see here the print head cleaning mechanism.

The master print head (which includes two removable heads) has a circuit board inside.

And this is the paper type detector. It has been compacted a bit when comparing to previous versions.

Reaching to the bottom layer, this is the paper feeding mechanism.

By removing the top cover, we discover the sixth and the last DC motor with its encoder.

The air pump

At the final step, we discover an air pump for the print head cleaning mechanism. It’s surprising!