Appendix A Components List A-5
Location
Number Component
Location
Number Component
1 Top cover 32 I/O unit (IOU#1)
2 CPU module (CPUM#0) 33 DC-DC Converter Riser (DDCR IOU#1 Not
shown)
3 CPU module (CPUM#1) 34 DC-DC Converter (DDC_B on DDCR on
IOU#0 Not shown)
4 CPU module (CPUM#2) 35 DC-DC Converter (DDC_A#0 IOU#1 Not
shown)
5 CPU module (CPUM#3) 36 PCI cassette (PCI#0 IOU#1)
6 172-mm fan (FAN_A#1) 37 PCI cassette (PCI#1 IOU#1)
7 172-mm fan (FAN_A#0) 38 PCI cassette (PCI#2 IOU#1)
8 172-mm fan (FAN_A#3) 39 PCI cassette (PCI#3 IOU#1)
9 172-mm fan (FAN_A#2) 40 PCI cassette (PCI#4 IOU#1)
10 Backplane unit (BPU_B - includes IOBP,
Power distribution board, bus bar)
41 PCI cassette (PCI#4 IOU#0)
11 172-mm fan backplane (FANBP_C) 42 PCI cassette (PCI#3 IOU#0)
12 CD-RW/DVD-RW backplane (DVDBP_B) 43 PCI cassette (PCI#2 IOU#0)
13 Tape backplane (TAPEBP) 44 PCI cassette (PCI#1 IOU#0)
14 Hard disk drive backplane (HDDBP#1
IOU#1)
45 PCI cassette (PCI#0 IOU#0)
15 Hard disk drive backplane (HDDBP#0
IOU#0)
46 Extended System Control facility unit
(XSCFU)
16 Hard disk drive (HDD#1 IOU#0) 47 DC-DC Converter (DDC_A#0)
17 Hard disk drive (HDD#0 IOU#0) 48 DC-DC Converter (DDC_A#1)
18 Hard disk drive (HDD#3 IOU#1) 49 DC-DC Converter (DDC_A#2)
19 Hard disk drive (HDD#2 IOU#1) 50 DC-DC Converter (DDC_A#3)
20 Tape drive unit (TAPEU) 51 DC-DC Converter (DDC_B#0)
21 CD-RW/DVD-RW Drive Unit (DVDU) 52 DC-DC Converter (DDC_B#1)
22 Front-panel 53 Motherboard unit (MBU_B)
23 Power supply unit (PSU#0) 54 Motherboard carriage
24 Power supply unit (PSU#1) 55 Memory board (MEMB#7)
25 Power supply unit (PSU#2) 56 Memory board (MEMB#6)
26 Power supply unit (PSU#3) 57 Memory board (MEMB#5)
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