System-Board-Assembly Switches - Lenovo ThinkSystem SR645 V3 System Configuration Manual

Table 10. System-board-assembly connectors (continued)
Second MGMT Ethernet connector
10
M.2 signal connector
11
PCIe connector 8 / SATA connector 3
12
7mm/Rear backplane sideband connector
13
OCP 3.0 module connector
14
Riser 1 slot
15
PCIe connector 9 / SATA connector 4
16
CMOS battery (CR2032)
17
Front USB connector
18
7mm backplane signal connector
19
Pump 1 connector
20
Leak detection connector
21
PCIe connector 7 / SATA connector 2
22
Fan 1–8 connectors
23

System-board-assembly switches

The following illustrations show the location of the switches on the server.
Note: If there is a clear protective sticker on the top of the switch blocks, you must remove and discard it to
access the switches.
Important:
1. Before you change any switch settings or move any jumpers, turn off the server; then, disconnect all
power cords and external cables. Review the following information:
•
http://thinksystem.lenovofiles.com/help/topic/safety_documentation/pdf_files.html
• "Installation Guidelines", "Handling static sensitive devices", and "Power off the server " in User
Guide or Hardware Maintenance Guide.
2. Any system-board-assembly switch or jumper block that is not shown in the illustrations in this
document are reserved.
SW5 switch block
The following table describes the functions of the SW5 switch block on the system board (system board
assembly).
Table 11. System-board-assembly SW5 switch block description
Switch-bit
Switch name
number
SW5–1 Force BMC CPU
1
reset
SW5–2 Clear CMOS
2
CFF retimer connector
33
Backplane power connector
34
PCIe connector 1
35
PCIe connector 2
36
PCIe connector 3 / SATA connector 0
37
Power supply 1 connector
38
PCIe connector 4 / SATA connector 1
39
Power supply 2 connector
40
GPU/7mm/Rear backplane power connector
41
PCIe connector 5
42
PCIe connector 6
43
Riser 2 slot
44
RoT connector
45
Intrusion switch connector (reserved)
46
Default position
Off Forces BMC and CPU into reset when changing it to
the ON position.
Off Clears the real-time clock (RTC) registry when
changing it to the ON position.
Description
.
Chapter 2 Server components
23