IBM pSeries 670, Service Manual

Page: 808 / 1032

Unit Emergency Power Off (UEPO) Card Assembly
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1 2
3
5
6
6
7
8
9
10
11
1 Simplified UEPO Front Panel 7 J02 Connector (White)
2 Simplified UEPO Side Panel 8 Power Switch
3 Simplified UEPO Rear Panel 9 System Fault LED
4 J00 Connector (Back) 10 Start Service Button (Green)
5 J01 Connector (Back) 11 Service Complete Button (White)
6 Room EPO Bypass Interlock
Removal
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 941.
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
assembly.
6. Loosen, but do not remove, the two 8-mm M5 mounting screws. Slide the assembly forward and away
from the frame.
Replacement
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 941.
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).
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Eserver
pSeries 670 Service Guide