6/02
2-86
DC1632/2240
6-355
Prelaunch Training/Review
Status Indicator RAPs
6-355 IPS Fan
IPS Fan failure.
Procedure
Enter dC330 [006-014] and press Start. The IPS FAN energizes.
YN
+24VDC is measured between the IIT/IPS PWB j725-2 (+) and GND (-)
YN
Visually check the F6 Fuse on the IIT/IPS PWB. The Fuse is open.
YN
Turn OFF the power. Disconnect the IIT LVPS j702 and turn the power ON.
+24VDC is measured between the IIT LVPS j702-1 (+) and GND (-)
YN
Check the power (ACH) to the IIT LVPS. If no problems are found,
replace the IIT LVPS (PL 18.4)
Check for a short circuit by referring to Chapter 7 Wiring Data ( IIT+24VDC)
Replace the IIT/IPS PWB (PL 18.3)
Enter dC330 [006-014] and press Start. +24VDC is measured between the IIT/IPS
PWB j722-b8 (+) and GND (-).
YN
Replace the IIT/IPS PWB (PL 18.3)
Turn the power OFF. Check the conductivity of the following. If no problems are found,
replace the IPS FAN (PL 18.4)
Between the IIT/IPS PWB j722-b8 and the IPS FAN j738-1
Between the IIT/IPS PWB j722-b9 and the IPS FAN j738-2
Between the IIT/IPS PWB j722-b10 and the IPS FAN j738-3
Between the IIT/IPS PWB j722-b11 and the IPS FAN j738-4
+5VDC is measured at the IIT/IPS j722-b10
YN
Replace the IIT/IPS PWB (PL 18.3)
Replace the IPS FAN (PL 18.4)
Figure 1 IPS Fan CD
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