Step 1523-11
Note: Read the Danger and Caution notices under “Safety Notices” on page xi before
continuing with this procedure.
Perform the following:
1. Disconnect the ac power cable(s) 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 socket(s)
where the ac power cable(s), just removed, was (were) attached.
Is the ac voltage from 200 V ac to 240 V ac?
NO Replace the power distribution unit. Reconnect the ac power cable(s) to the
power distribution unit.
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostics Information for Multiple Bus Systems
.
YES Go to “Step 1523-12”.
Step 1523-12
Reconnect the ac power cables(s) to the power distribution unit.
Note: Read the Danger and Caution notices under “Safety Notices” on page xi before
continuing with this procedure.
Perform the following:
1. Disconnect the ac power cable from each power supply of secondary I/O drawer.
2. Use a multimeter to measure the ac voltage at the drawer end of each ac power
cable.
Is the ac voltage from 200 V ac to 240 V ac?
NO Replace the ac power cable(s).
This ends the procedure. Go to ″Map 0410: Repair Checkout″ in the
Diagnostics Information for Multiple Bus Systems
.
YES Go to “Step 1523-13” on page 108.
Chapter 3. Maintenance Analysis Procedures 107
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