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

7.4.4 Replacing electronic mainboard (Maestria)

Connectors
1) no wiring
2) NTC 1 temperature sensor connector
(red), coffee thermoblock
3) NTC 2 temperature sensor connector
(white), steam thermoblock
Flat receptacles
X11 Heat 2, steam thermoblock (gray)
X10 Heat 1, coffee thermoblock (white)
X9 N, On/Off button (light blue)
X1 no wiring
X19 Pump 2, steam pump (gray)
X18 Pump 1, coffee pump (white)
X12 shut down, On/Off button (black)
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) Steam valve connector
(3 colours)
7) Espresso push/turn control (white)
X20 no wiring
X13 no wiring
X15 Ph Pump 1+2, both pumps (brown)
X17 no wiring
X7 Ph Heat 1, coffee thermoblock (brown)
X8 Ph Heat 2, steam thermoblock (brown)
X6 L(F), On/Off button (brown)
Maestria / Gran Maestria service manual
R E P A I R S
6 7
X22
X14
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.
49