C H A P T E R 1

Sun Ultra 20 M2 Workstation Hardware Features

This chapter provides an overview of the Sun Ultra 20 M2 Workstation hardware features, and includes the following sections:

1.1 Front Panel

FIGURE 1-1 illustrates the front panel of the Sun Ultra 20 M2 Workstation. TABLE 1-1 lists the components called out in the figure.

FIGURE 1-1 Front Panel Components

Figure showing the front panel of the Sun Ultra 20 M2 Workstation. The following table describes the front panel components, numbered left to right.

TABLE 1-1 Front Panel Components
Label	Button/LED/Port	Label	Button/LED/port
1	Power button	4	Two USB 2.0 ports
2	Power LED	5	Microphone-in jack
3	Two 1394 ports	6	Headphone-out jack

FIGURE 1-2 depicts the back panel of the Sun Ultra 20 M2 Workstation. TABLE 1-2 lists the components called out in the figure.

FIGURE 1-2 Back Panel Components

Figure showing the back panel of the Sun Ultra 20 M2 Workstation. The following table describes the back panel components, numbered top to bottom.

TABLE 1-2 Back Panel Components
Label	Connector/Slot	Label	Connector/Slot
1	Power connector	8	Four USB 2.0 connectors
2	Power switch	9	PCI Express x16 graphics slot
3	Onboard DB15 VGA graphics connector (for ES 1000 graphics controller)	10	PCI Express x1 slot
4	Line-in jack	11	PCI Express x16 mechanical slot (x8 electrical)
5	Line-out jack	12	Three PCI 33-MHz 32-bit slots
6	Microphone jack	13	Cover plate, no slot
7	Two Ethernet connectors

FIGURE 1-3 shows the location for major system components and connectors. TABLE 1-3 lists the components called out in the figure.

FIGURE 1-3 Internal System Components

Figure showing the inside components, numbered and labelled as in the table below.

TABLE 1-3 Internal System Components
Label	Component	Label	Component
1	Power supply	6	DVD release lever
2	Memory (DIMMs)	7	I/O board release thumbscrew
3	System fan	8	Heatsink release lever
4	PCI Express slots (3) numbered PCI-E slot 0 (top) to PCI-E slot 2	9	System serial number
5	PCI slots (3) numbered PCI slot 0 (top) to PCI slot 2	10	Hard disk drive(s)

FIGURE 1-4 shows the cable connections on the motherboard. TABLE 1-4 lists the components called out in the figure.

FIGURE 1-4 Power Supply and Component Cable Connections to Motherboard

Figure shows motherboard cables described counterclockwise in table below starting at motherboard top right.

TABLE 1-4 Power Supply and Component Cable Connections to Motherboard
Label	Cable Connection	Label	Cable Connection
1	Power supply 3 to DVD drive	8	DVD drive to motherboard IDE
2	DVD drive analog to motherboard J8	9	I/O board J5 to motherboard USB 3
3	I/O board J1 to motherboard J7	10	Storage backplane HDD2 to motherboard SATA 2
4	Power supply P2 to motherboard PWR2	11	Storage backplane HDD1 to motherboard SATA 1
5	Power supply P1 to motherboard PWR1	12	I/O board J12 to motherboard FPB
6	System fan to motherboard SYS_FAN	13	I/O board J8 to motherboard 1394-1 and 1394-2
7	Power supply P4 to storage backplane J3	14	CPU fan to motherboard CPU_FAN