Replacing Electronic Mainboard (Gran Maestria) - Nespresso Maestria EF 285 Service Manual

Top covers removed.
The bottom cover has
2 cable guides (8).
Other guides are
present on the print cover.
Cables must be correctly
guided to avoid squeezing.
The connectors are
coloured to match the
cable colours.
82
R E P A I R S

7.5.4 Replacing electronic mainboard (Gran Maestria)

Connectors
1) Milk frother connector (4 colours)
2) NTC 1 temperature sensor connector
(red), coffee thermoblock
3) NTC 2 temperature sensor connector
(white), cup heater thermoblock
Flat receptacles
X11 Heat 2, cup heater thermoblock
(gray)
X10 Heat 1, coffee thermoblock (white)
X9 N, On/Off button (light blue)
X1 Aeroccino, milk frother connector
X19 Pump 2, cup heater (red)
X18 Pump 1, coffee pump (white)
X12 shut down, On/Off button (black)
X20 Cup heater (yellow)
For disassembly refer to instructions for Maestria coffee machine (see "Replacing elec-
tronic mainboard (Maestria)" on page 49 and following).
Maestria / Gran Maestria service manual
3 5
1 2 4
X26
X25
X3
X27
X16
X11
X10
8
4) Flow meter connector (white)
5) Lungo push/turn control (red)
6) Milk regulator connector (black)
7) Espresso push/turn control (blue)
X13 Pump 2, switch A, cup heater pump
(gray)
X15 Ph Pump 1+2, both pumps (brown)
X17 Aeroccino, milk frother connector
(brown)
X7 Ph Heat 1, coffee thermoblock (brown)
X8 Ph Heat 2, cup heater thermoblock
(brown)
X6 L(F), On/Off button (brown)
6 7
X22
X14