Iit Dc Power Rap - Xerox Phaser 790 Service Manual

001-712 IIT DC Power RAP

Initial Actions
Ensure AC power is available at the wall outlet.
Ensure that the AC Power Cord is securely connected to the system.
Procedure
Remove the Rear Cover (REP 6.4) from the IIT. Check the following voltages at P91 (Figure 1)
on the IIT LVPS:
• P91-1 (Orange Wire) for +24 VDC
• P91-2 (Orange Wire) for +24 VDC
• P91-3 (Gray Wire) for +5 VDC
• P91-4 (Gray Wire) for +3.5 VDC
All of the voltage are available.
Y N
All of the voltages are missing.
Y N
Check the pins on connector P/J91. Look for loose or damaged pins. If the connector
is OK, replace the IIT LVPS (PL 16.1).
Check the Fuse (Figure 1) on the IIT LVPS. The Fuse is defective.
Y N
AC line voltage is available between JN1-1 and JN1-2 (Figure 1).
Y N
Replace the AC Switch/Harness (PL 16.6).
Replace the IIT LVPS (PL 16.1).
Replace the Fuse. If the Fuse blows again, replace the IIT LVPS (PL 16.1).
Go to the wirenets to check for any wires that may be open.
Check the IIT LVPS connectors for any loose or damaged pins.
Initial Issue
Phaser 790/DocuColor 2006
10/00
2-27
Status Indicator RAPs
001-712