TECHNICAL INFORMATION HD7870/80 / HD7870/81 Volume adjustment The PCB circuit board makes it possible to adjust the volume output by means of pushing the one-cup and two- cup user controls. How to adjust the volume output: 1. Make sure the boiler is fi lled properly, otherwise perform fi ll procedure see DFU for instructions.
HD7870/80 / HD7870/81 SCHEMATICS UI PCBA Water level On/Off button sensor 1-cup button 2-cup button Toggle button Communi cation On/Off LED Water 1-cup LED Supply Boiler 2-cup LED System Toggle LED PCBA Fuse Regular LED Strong LED Pump M Memory LED Descale LED Fuse Buzzer...
DISASSEMBLY- AND RE-ASSEMBLY ADVISE HD7870/80 / HD7870/81 To remove the brewhead assembly: • Now use the screwdriver to trace around the edge of the tray panel assembly and base plate until you reach • Remove the back cover. the position of the drip tray. Repeat the process for the •...
HD7870/80 / HD7870/81 REPAIR INSTRUCTION Please note, as the appliance is equipped with a capacitive touch panel as a user interface, special 2-cup button attention is required to be able to enter several service modes. The capacitive buttons need 0,5 seconds to initialize after the mains is connected.
HD7870/80 / HD7870/81 REPAIR INSTRUCTION BOILER RESET: Boiler-reset-step 0 Entry to boiler reset mode: ME/HE selection 1. Connect mains; In this appliance ME (Mid-End) should be selected; 2. After 0.5 second and before 1.5 second operate the Strong LED off. 1-cup button.
HD7870/80 / HD7870/81 REPAIR INSTRUCTION SENSOR AND LED TEST To validate the assembly and electrical correctness of an appliance, especially during testing and debugging phase, a sensor and LED test is very useful. Please keep in mind that it is not an automated test and only intended as indication.
HD7870/80 / HD7870/81 PARTS LIST Service code Description Remark 4222 259 44211 Padholder assy 1 Deep black 4222 259 44221 Padholder assy 2 Deep black 4222 247 67501 Collector Deep black 4222 259 57261 Spout assy complete Chinese Fire 4222 247 67751 Driptray cover Deep black 4222 247 68611...