Nordson ProBlue P4 Customer Product Manual page 143

Is LED DS5 on the main board
illuminated?
−
See Figure 6-1.
+
Is the green power LED on the
CPU board illuminated?
−
See Figure 6-1.
+
Is the voltage across TP2 and
TP4 on the CPU board between
−
4.75 and 5.25 VDC?
See Figure 6-1.
+
Is the red CPU warning LED
illuminated?
−
See Figure 6-1.
+
Replace the CPU board.
P/N 1028325.
Isolate the failed control
component.
Refer to DP.1.
Replace the main board
assembly.
P4/P7 − P/N 1028322.
P10 − P/N 1028323.
Contact Nordson for technical
assistance.
Is the ribbon cable between the
main board and the CPU board
−
improperly aligned, loose or
visibly damaged?
See Figure 6-1.
+
Secure or replace the ribbon
cable.
P/N 1018283.
T.1.1
Starting conditions:
Control panel is not illuminated >
Disconnect switch is on >
DS4 is illuminated
Replace the CPU.
P/N 1028325.