IBM pSeries 690 Service Manual page 882

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Table of Contents

Unit Emergency Power Off (UEPO) Card Assembly

1 Simplified UEPO Front Panel

2 Simplified UEPO Side Panel

3 Simplified UEPO Rear Panel

4 J00 Connector (Back)

5 J01 Connector (Back)

6 Room EPO Bypass Interlock

Note: If you are replacing this assembly with a new assembly, the manufacturing label with the machine

type, model number, and the serial number for the subsystem must be ordered to apply to the new

part. For information on replacement labels, see Chapter 10, "Parts Information," on page 1027.

1. Locate the system with the faulty UEPO switch.

2. Press the green Start Service button on the UEPO switch.

3. Switch the UEPO bypass switches on both BPCs to the "Bypass" position (to the right).

4. Ensure that the red switch on the EPO panel is in the ON position.

5. Verify that all cables are labeled for plug location and then unplug the cables from the UEPO card

6. Loosen, but do not remove, the two 8-mm M5 mounting screws. Slide the assembly forward and away

from the frame.

Note: If you are replacing this assembly with a new assembly, the manufacturing label with the machine

type, model number, and the serial number for the subsystem must be ordered to apply to the new

part. For information on replacement labels, see Chapter 10, "Parts Information," on page 1027.

1. Place the assembly over the two 8-mm M5 screws, slide it downward, and tighten the screws.

2. Plug all cables to the UEPO card assembly, ensuring that the plug location and the cable label agree.

3. Install the external cable, if required, to connector J02.

a. If the external EPO connection is installed, the internal toggle switch is mechanically forced into the

ROOM EPO ACTV position (to the right).

Eserver pSeries 690 Service Guide

7 J02 Connector (White)

8 Power Switch

9 System Fault LED

10 Start Service Button (Green)

11 Service Complete Button (White)