UEPO Switch
The UEPO (Unit Emergency Power Off) switch is accessible through the external cover. The switch
contains a room emergency power off (EPO) interlock connector and bypass switch, a dual element rack
service amber LED (one element driven per bulk power controller, a service complete button (white) and
start service button (green), an off button and four thermistors for BPC ambient temperature sensing. The
UEPO switch is shown in the following figure.
4
1
2
3
5
6
6
7
8
9
10
11
1
UEPO Front Panel
7
J02 Connector
2
UEPO Side Panel
8
Power Switch
3
UEPO Rear Panel
9
System Fault LED
4
J00 Connector Front BPA (Back)
10
Start Service Button (Green)
5
J01 Connector Rear BPA (Back)
11
Service Complete Button (White)
6
Room EPO Bypass Interlock
The UEPO switch disables 350 V bulk power conversion and isolates all battery power to the battery
compartments, without having to disconnect the heavy power cords under the customer’s raised floor.
At the system level, the UEPO switch is connected to each of the two BPCs through two interface
connectors. The switch can be concurrently replaced by forcing the BPCs into UEPO bypass mode, using
the small slide switches on the face of the BPCs. The switch is mounted in the side pocket area of the
rack and remains stationary when the front cover of the system is opened. The service buttons are used
by service personnel to repair the power subsystem. If the system is off when the service complete button
is pressed, the system will power on. A sliding plastic cover over the red switch prevents it from being
accidentally activated in the customer environment.
Chapter 1. Reference Information
19
Summary of Contents for pSeries 670
Page 1: ...pSeries 670 Service Guide SA38 0615 03 ERserver...
Page 2: ......
Page 3: ...pSeries 670 Service Guide SA38 0615 03 ERserver...
Page 12: ...x Eserver pSeries 670 Service Guide...
Page 16: ...xiv Eserver pSeries 670 Service Guide...
Page 18: ...xvi Eserver pSeries 670 Service Guide...
Page 324: ...Yes Go to Step 154A 14 on page 302 304 Eserver pSeries 670 Service Guide...
Page 718: ...698 Eserver pSeries 670 Service Guide...
Page 848: ...L3 Cache Shorts Test Step 4 828 Eserver pSeries 670 Service Guide...
Page 849: ...L3 Cache Shorts Test Step 5 Chapter 9 Removal and Replacement Procedures 829...
Page 851: ...L3 Cache Shorts Test Step 2 Chapter 9 Removal and Replacement Procedures 831...
Page 853: ...L3 Cache Shorts Test Step 4 Chapter 9 Removal and Replacement Procedures 833...
Page 854: ...L3 Cache Shorts Test Step 5 834 Eserver pSeries 670 Service Guide...
Page 971: ...7040 Model 671 Media Subsystem 1 2 3 4 5 6 7 8 9 10 Chapter 10 Parts Information 951...
Page 973: ...Power and SCSI Cables to the Media Subsystem 1 2 3 5 4 6 Chapter 10 Parts Information 953...
Page 986: ...966 Eserver pSeries 670 Service Guide...
Page 990: ...970 Eserver pSeries 670 Service Guide...
Page 1018: ...998 Eserver pSeries 670 Service Guide...
Page 1020: ...1000 Eserver pSeries 670 Service Guide...
Page 1028: ...1008 Eserver pSeries 670 Service Guide...
Page 1031: ......