Sun Microsystems Ultra 5, Service Manual

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C-26 Sun Ultra 5 Service Manual • February 2000
C.1.7 Power and Standby Switching
The system has one power switch and two standby switches. These switches include
the power switch, the front panel standby switch, and the Type-5 keyboard Standby
key (or the Sun I/O Type-6 keyboard Power key).
C.1.7.1 Power Switch
The power switch is located on the system rear, on the power supply. When set to
off, the system is completely off with no power.
C.1.7.2 Front Panel Standby Switch
The front panel standby switch turns on the system if the power supply on/off
switch is set to on and the system has been previously placed in the standby mode.
The front panel standby switch can also be used to halt the operating system and
place the system in standby mode.
C.1.7.3 Keyboard Standby/Power Key
The keyboard Standby/Power key turns on the system if the power switch is set to
on and the system has been previously placed in the standby mode.
The keyboard Standby/Power key can also be used to suspend the operating system
and place the system in the standby mode if the Energy Star power management
software (
dtpower
) has been installed.
Output voltage at headphone out that results from a
full scale digital signal (ATTN= 10.5 dB) 1.55 1.67 1.91 V (p-p)
Headphone output impedance 15 16 1.0K ohm
Line-out output impedance 207 220 233 ohm
TABLE C-8
Audio Output Electrical Specification (Continued)
Parameter OLB= 1 (Rec=50, Mon, Play=100) Min Nom Max Unit