Step 1523-13
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.
Disconnect the ac power cable from each power supply. Then replace the following
components in the secondary I/O drawer, one at a time, in the sequence listed. After
replacing, reconnect the ac power cable to each power supply.
v Secondary I/O drawer operator panel
v Secondary I/O drawer backplane
v Power supply (including redundant power supply, if present)
Does the secondary I/O drawer operator panel turn on the power present LED?
NO Contact your next level of support for assistance.
YES This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostics Information for Multiple Bus Systems
.
Step 1523-14
Is the ac power cable from the secondary rack power distribution unit to the
customer’s ac power outlet connected and seated correctly at both ends?
NO 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
.
YES Go to “Step 1523-15”.
Step 1523-15
Note: Read the Danger and Caution notices under “Safety Notices” on page xi before
continuing with this procedure.
Perform the following:
1. Disconnect the mainline ac power cable from the power distribution unit that
supplies power to the secondary 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 Go to “Step 1523-16” on page 109.
YES Replace the power distribution unit.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostics Information for Multiple Bus Systems
.
108 Service Guide
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