La Marzocco GB5 and FB80 Dosing Touchpad with Tea Button – Slave (E.1.003)

La Marzocco GB5 & FB80 Dosing Touchpad with Tea Button – Slave (E.1.003)

OEM replacement dosing circuit touchpad (slave board) for the La Marzocco GB5 and FB80 commercial espresso machines. Part number E.1.003. This touchpad provides baristas with dose selection buttons, continuous brew, and a dedicated hot water (tea) button in a single panel — the primary user interface for the group’s electronic dosing controls.

Compatible Models

Part Details

• Brand: La Marzocco
• Part Number: E.1.003
• Type: Slave touchpad (dosing circuit)
• Buttons: Dose selection, continuous brew, hot water (tea)
• Weight: 0.2 kg
• Note: Non-returnable — confirm model and touchpad function before ordering

La Marzocco Touchpad Not Responding? A Short Maintenance Guide

A touchpad that won’t respond, sends incorrect doses, or has one or more dead buttons is a common fault on high-use La Marzocco GB5 and FB80 machines. Here’s how to diagnose the issue and determine whether the touchpad is the cause.

What Does the Slave Touchpad Do?

The slave touchpad is the button panel on the group head that the barista interacts with directly. It communicates with the machine’s main control board (master board) via a ribbon cable connection. When a button is pressed, the slave sends a signal to the master, which activates the pump and counts flow pulses to deliver the programmed dose.

Signs the Touchpad Needs Replacing

• One or more buttons not responding — pressing a dose button produces no reaction from the pump or group.
• Incorrect or inconsistent doses — the machine dispenses a different volume each time despite unchanged programming.
• All buttons unresponsive — the machine powers on but the group touchpad is completely dead. Check the ribbon cable connection first before condemning the touchpad.
• Hot water (tea) button not working — specifically relevant to this E.1.003 slave, which includes the dedicated tea button.

Ribbon Cable Check Before Replacing

Before ordering a replacement touchpad, inspect the ribbon cable connecting the slave board to the main control board. A loose, kinked, or corroded ribbon cable is a frequent cause of touchpad faults and is a much cheaper fix. If the cable is intact and seated correctly and the fault persists, the touchpad itself requires replacement.

Installation Note

Touchpad replacement requires access to the machine’s internal wiring and electronic dosing controls. This work is recommended for a qualified technician. The part is non-returnable — confirm your machine model (GB5 or FB80) and that you require the slave touchpad with tea button before ordering.

Frequently Asked Questions

What is the difference between the master and slave touchpad on a La Marzocco GB5?

The master board is the main control board housed inside the machine that manages dosing logic and programming. The slave touchpad is the button panel on the group head that sends input signals to the master. This listing is for the slave touchpad only.

Will this touchpad work on the La Marzocco Linea or Strada?

Part number E.1.003 is confirmed for the GB5 and FB80. Other La Marzocco models use different touchpad configurations. Contact Bear Coffee Machine to confirm compatibility before ordering.

Do you ship Australia-wide?

Yes. Bear Coffee Machine ships to all Australian states and territories with fast dispatch.