RUN EXCITE-2008: Service & Maintenance Manual - rev. 1.3
Page 6.14
6.4.
THE DISPLAY FAILS TO ILLUMINATE
6.4.1.
LED
MODELS
(500
–
700
–
900)
This error occurs when the power supply voltage does not reach the upper assembly.
Does the main v oltage (110-220
Vac) is at the input of the machine
and the circuit brakers are ok?
Are the 2 LEDs on the
rear side of the display
board on?
Bring the main v oltage
to the inlet socket of
the machine and/or
check the circuit
brakers
THE DISPLAY
FAILS TO
ILLUMINATE
NO
YES
NO
YES
1
2
Are the 2 LEDs of +5 Vdc
and +12Vdc, on the ALE
driver on?
Replace the display
board
Replace the ALE driver
NO
YES
3
5
Is the main voltage to the
input of the ALE driver?
YES
4
Check the cables
TRM 20
TRM 19
NO
Is the main voltage
to the output of
power supply box?
YES
Replace CU180 cable
NO
Replace the power supply
box
7
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