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Step 1521-13
Check internal drawer cabling from power distribution card to primary I/O backplane.
See "Primary I/O Drawer Internal Cables" on page 483 in Chapter 10.
Replace the following in the primary I/O drawer, one at a time, disconnecting the ac
power cable to each power supply before replacement and reconnecting the ac power
cable to each supply after replacement:
v Primary I/O drawer operator panel
v Power supply (including redundant power supply, if present)
v Primary I/O drawer backplane
Does the Primary I/O Drawer Operator Panel Show the OK Prompt?
NO
YES
Step 1521-14
Is the ac power cable from the rack power distribution unit to the customer's ac
power outlet connected and seated correctly at both ends?
NO
YES
Step 1521-15
Note: Read the Danger and Caution notices under "Safety Notices" on page xi before
Perform the following:
1. Disconnect the mainline ac power cable from the power distribution unit that
supplies power to the primary I/O drawer.
2. Use a multimeter to measure the ac voltage at the power distribution unit end of the
mainline ac power cable.
Is the ac voltage from 200 V ac to 240 V ac?
NO
YES
Contact your next level of support for assistance.
This ends the procedure. Go to "Map 0410: Repair Checkout" in the
Diagnostics Information for Multiple Bus Systems .
Connect the ac power cable correctly at both ends.
This ends the procedure. Go to "Map 0410: Repair Checkout" in the
Diagnostics Information for Multiple Bus Systems .
Go to "Step 1521-15".
continuing with this procedure.
Go to "Step 1521-16" on page 96.
Replace the power distribution unit.
This ends the procedure. Go to "Map 0410: Repair Checkout" in the
Diagnostics Information for Multiple Bus Systems .
Chapter 3. Maintenance Analysis Procedures
95
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