Douwe Egberts Cafitesse 50, Service Manual

Page: 72 / 106

Functions (Machine control) - 2
Version 1.36
02/2004
7. Unplug the connectors from the control board. (There is no specific order of disconnecting)
8. Loosen the screws (2) of the retaining rails, remove the rails and take the board out.
The settings of the machine are stored in the EEPROM. When you install a new control PCB you
may want to use the EEPROM from the board that was installed in the machine and mount it on
the new control board. Align the notch of the EEPROM / micro-processor with the notch in the
socket of the PCB!
Do not replace the EEPROM without the proper tools or training! Incorrect handling will
cause instant damage to the electrical components.
9. Install the new board back into the machine and connect the various connectors.
10. Reassemble the machine and program the machine if a new board with new EEPROM is installed.
Power supply PCB
CN9
CN14
CN13
CN8
EEPROM
Power check LED
(this indicates that the 5V power is
supplied to the board)
Retaining rail
To machine
left side
Voltage measuring
points
(see page 5)
CN12
CN18: reserved (for measurement purposes only)
CN17: reserved for payment systems
CN 16 (black)
CN 15 (red)
secured to frame
Peltier element
wiring
Ferrite core present in 100V 50/60 Hz
machine version (Japan).