System Control (Sc) Board Replacement; System Control Board Leds; Table 6-1 System Control Board Components; Table 6-2 System Control Board Valid Led Status - Sun Microsystems Sun Fire E25K Service Manual

6.1

System Control (SC) Board Replacement

6.1.1

System Control Board LEDs

System Control (SC) board components and LEDs are listed in
TABLE 6-2
TABLE 6-1
Total Number of System Control
TABLE 6-2
LEDs After Insertion
or Initial System Power On
Active Service Remove Active Service Remove Active Service Remove Active Service Remove
on
The SC CPU slot and SC 6U/3U spare slot on the SC board do not have unique bits,
referred to as presence bits. Failure of the service LED to transition from ON to OFF
within 60 seconds after insertion indicates a power-status control fault.
TABLE 6-3
TABLE 6-3
Indicator Functions
Alarm
Ready
Reset button
Abort button
6-2 Sun Fire E25K/E20K Systems Service Manual • April 2004
.
System Control Board Components
Boards Per System
2
System Control Board Valid LED Status
LEDs After Presence
is Detected
on off on
describes the SC CPU board indicator functions.
System Control CPU Board Indicator Function Descriptions
Total Number of System Control
Boards Per side
1
Component Powered On
off off on off
Description
Not used
Component ON and board is READY
Global reset to the SC CPU and PCI reset to the SC
Resets the CPU
and
TABLE 6-1
Number of LEDs Per System
Control Board
9
Component Powered Off
off off off on