IBM T00 Service Manual page 35

Step 1522-7
1. Plug the drawer power cable into another outlet on the power distribution bus.
2. Turn on power to the drawer.
Did the drawer power light come on and stay on?
NO Go to "Step 1522-8."
YES The first outlet is defective. Use the second outlet, or exchange the power distribution bus, and
then go to "Step 1522-10."
Step 1522-8
1. Plug the power cable of another device or drawer into the same outlet.
2. Turn on power to the device or drawer.
The green light near the ac plug on the rear of some drawers indicates only that power is reaching the
drawer and not that the power supply is operating.
Did the drawer power light come on and stay on or are the fans operating?
NO Exchange the power distribution bus, and then go to "Step 1522-10."
YES The problem is probably located in the original drawer. Go to "MAP 1520: DC Power Distribution
Panel - Power MAP" on page 17 in the service guide for the system installed in your rack.
Step 1522-9
1. Plug the CPU drawer power cable into another outlet on the power distribution bus.
2. Set the power button to on (button pushed in).
Did the circuit breaker go to the Off position (pop out)?
NO The first circuit breaker is probably defective. Use the second outlet, or exchange the power
distribution bus, and then go to "Step 1522-10."
YES The drawer is overloading the circuit breaker. Exchange the CPU drawer power cable or power
supply. Then go to "Step 1522-10."
Step 1522-10
1. Connect all drawer power cables to their original power outlets on the power distribution bus.
2. This completes the repair. Go to "MAP 0410: Repair Checkout" in the Diagnostic Information for
Multiple Bus Systems.
Chapter 2. Maintenance Analysis Procedures
23