Guide to diagnostics of electronic controls EWM10931
2011 SOE/DT-mdm FCPD-dp Quality-tb
19/75
599 73 77-37
6 CANNOT ACCESS THE DIAGNOSTICS PROGRAMME
6.1 None of the LEDs on the circuit board light up
Are the power supply cable and the connection
on the main board (connector
J1
)
working properly?
No
→
Replace/repair the power supply cable,
check the connection
Yes
↓
Is the communication wiring between the main
board (connector
J4
) and the display board
(connectors
J2
and
J3
) working properly?
(insert and remove)
No
→
Replace/repair wiring
Yes
↓
Does the ON/OFF button function
mechanically?
No
→
Replace/repair the button or
replace the display board
Yes
↓
Change the main circuit board
Is the appliance working correctly?
No
→
Replace display board
Yes
↓
Run the diagnostics programme.
6.2 Some LEDs come on, on the display board
Are the keys unobstructed through the control
panel slots and do they activate the various
buttons correctly?
No
→
Sort out any mechanical problems
(control panel/buttons/pins)
Yes
↓
Change the display board and run the
diagnostics programme
MAIN CIRCUIT
BOARD
DISPLAY BOARD
GENERAL EARTHING
J1